/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/Problem15_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:19:52,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:19:52,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:19:52,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:19:52,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:19:52,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:19:52,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:19:52,157 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:19:52,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:19:52,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:19:52,162 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:19:52,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:19:52,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:19:52,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:19:52,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:19:52,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:19:52,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:19:52,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:19:52,177 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:19:52,197 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:19:52,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:19:52,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:19:52,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:19:52,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:19:52,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:19:52,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:19:52,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:19:52,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:19:52,228 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:19:52,229 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:19:52,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:19:52,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:19:52,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:19:52,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:19:52,236 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:19:52,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:19:52,237 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:19:52,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:19:52,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:19:52,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:19:52,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:19:52,242 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 18:19:52,308 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:19:52,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:19:52,310 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:19:52,312 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:19:52,312 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:19:52,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:19:52,313 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:19:52,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:19:52,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:19:52,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:19:52,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:19:52,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:19:52,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:19:52,316 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:19:52,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:19:52,316 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:19:52,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:19:52,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:19:52,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:19:52,317 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:19:52,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:19:52,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:19:52,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:19:52,318 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:19:52,318 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:19:52,318 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:19:52,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:19:52,319 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:19:52,319 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:19:52,319 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:19:52,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:19:52,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:19:52,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:19:52,757 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:19:52,758 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:19:52,759 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label06.c [2020-10-27 18:19:52,832 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97fd1f5ba/6d1c5e7fecd54c0892474c58c594439c/FLAG20e7c3b5d [2020-10-27 18:19:53,896 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:19:53,897 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label06.c [2020-10-27 18:19:53,922 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97fd1f5ba/6d1c5e7fecd54c0892474c58c594439c/FLAG20e7c3b5d [2020-10-27 18:19:53,953 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97fd1f5ba/6d1c5e7fecd54c0892474c58c594439c [2020-10-27 18:19:53,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:19:53,963 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:19:53,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:19:53,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:19:53,970 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:19:53,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:19:53" (1/1) ... [2020-10-27 18:19:53,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dd4eaec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:19:53, skipping insertion in model container [2020-10-27 18:19:53,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:19:53" (1/1) ... [2020-10-27 18:19:53,984 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:19:54,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:19:54,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:19:54,944 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:19:55,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:19:55,314 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:19:55,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:19:55 WrapperNode [2020-10-27 18:19:55,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:19:55,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:19:55,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:19:55,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:19:55,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:19:55" (1/1) ... [2020-10-27 18:19:55,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:19:55" (1/1) ... [2020-10-27 18:19:55,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:19:55" (1/1) ... [2020-10-27 18:19:55,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:19:55" (1/1) ... [2020-10-27 18:19:55,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:19:55" (1/1) ... [2020-10-27 18:19:55,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:19:55" (1/1) ... [2020-10-27 18:19:55,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:19:55" (1/1) ... [2020-10-27 18:19:55,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:19:55,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:19:55,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:19:55,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:19:55,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:19:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:19:55,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:19:55,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:19:55,673 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:19:55,673 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:19:55,673 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:19:55,673 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:19:55,674 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:19:55,674 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:19:55,674 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:19:55,674 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:19:55,674 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:19:55,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:19:55,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:19:55,675 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:19:55,675 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:19:55,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:19:55,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:19:55,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:19:55,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:19:55,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:19:55,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:19:59,071 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:19:59,071 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:19:59,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:19:59 BoogieIcfgContainer [2020-10-27 18:19:59,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:19:59,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:19:59,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:19:59,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:19:59,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:19:53" (1/3) ... [2020-10-27 18:19:59,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a897e72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:19:59, skipping insertion in model container [2020-10-27 18:19:59,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:19:55" (2/3) ... [2020-10-27 18:19:59,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a897e72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:19:59, skipping insertion in model container [2020-10-27 18:19:59,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:19:59" (3/3) ... [2020-10-27 18:19:59,088 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label06.c [2020-10-27 18:19:59,102 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:19:59,109 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:19:59,124 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:19:59,173 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:19:59,173 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:19:59,173 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:19:59,173 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:19:59,174 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:19:59,174 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:19:59,174 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:19:59,174 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:19:59,219 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-27 18:19:59,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 18:19:59,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:19:59,235 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] [2020-10-27 18:19:59,235 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:19:59,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:19:59,245 INFO L82 PathProgramCache]: Analyzing trace with hash 239263079, now seen corresponding path program 1 times [2020-10-27 18:19:59,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:19:59,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756044723] [2020-10-27 18:19:59,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:19:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:19:59,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:00,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:00,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 18:20:00,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:20:00,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 777 [2020-10-27 18:20:00,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:00,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:20:00,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:20:00,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 18:20:00,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 18:20:00,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:20:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:00,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:00,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:00,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:20:00,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:20:00,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-27 18:20:00,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:00,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:20:00,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:20:00,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:20:00,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:20:00,598 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 18:20:00,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756044723] [2020-10-27 18:20:00,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:20:00,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:20:00,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161487823] [2020-10-27 18:20:00,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:20:00,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:20:00,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:20:00,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:20:00,634 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-27 18:20:09,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:20:09,487 INFO L93 Difference]: Finished difference Result 1208 states and 2172 transitions. [2020-10-27 18:20:09,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:20:09,489 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-10-27 18:20:09,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:20:09,512 INFO L225 Difference]: With dead ends: 1208 [2020-10-27 18:20:09,512 INFO L226 Difference]: Without dead ends: 703 [2020-10-27 18:20:09,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:20:09,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2020-10-27 18:20:09,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 697. [2020-10-27 18:20:09,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-10-27 18:20:09,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1016 transitions. [2020-10-27 18:20:09,650 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1016 transitions. Word has length 63 [2020-10-27 18:20:09,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:20:09,651 INFO L481 AbstractCegarLoop]: Abstraction has 697 states and 1016 transitions. [2020-10-27 18:20:09,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:20:09,652 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1016 transitions. [2020-10-27 18:20:09,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-27 18:20:09,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:20:09,660 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:09,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:20:09,660 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:20:09,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:20:09,661 INFO L82 PathProgramCache]: Analyzing trace with hash 804207052, now seen corresponding path program 1 times [2020-10-27 18:20:09,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:20:09,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834717850] [2020-10-27 18:20:09,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:20:09,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:09,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:10,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:10,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:11,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:11,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-27 18:20:11,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:20:11,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1678 [2020-10-27 18:20:11,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:11,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:20:11,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 18:20:11,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 18:20:11,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:20:11,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:20:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:11,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:11,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:11,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:20:11,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:20:11,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:20:11,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:11,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:20:11,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:20:11,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:20:11,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:20:11,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:20:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:11,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:11,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:11,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 18:20:11,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:20:11,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-27 18:20:11,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:11,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:20:11,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:20:11,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 18:20:11,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:20:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:20:11,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834717850] [2020-10-27 18:20:11,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:20:11,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:20:11,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336118981] [2020-10-27 18:20:11,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:20:11,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:20:11,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:20:11,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:20:11,829 INFO L87 Difference]: Start difference. First operand 697 states and 1016 transitions. Second operand 5 states. [2020-10-27 18:20:19,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:20:19,612 INFO L93 Difference]: Finished difference Result 1714 states and 2604 transitions. [2020-10-27 18:20:19,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:20:19,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2020-10-27 18:20:19,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:20:19,622 INFO L225 Difference]: With dead ends: 1714 [2020-10-27 18:20:19,623 INFO L226 Difference]: Without dead ends: 1023 [2020-10-27 18:20:19,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:20:19,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2020-10-27 18:20:19,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1019. [2020-10-27 18:20:19,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1019 states. [2020-10-27 18:20:19,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1397 transitions. [2020-10-27 18:20:19,705 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1397 transitions. Word has length 142 [2020-10-27 18:20:19,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:20:19,711 INFO L481 AbstractCegarLoop]: Abstraction has 1019 states and 1397 transitions. [2020-10-27 18:20:19,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:20:19,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1397 transitions. [2020-10-27 18:20:19,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-27 18:20:19,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:20:19,727 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:19,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:20:19,728 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:20:19,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:20:19,731 INFO L82 PathProgramCache]: Analyzing trace with hash 340881682, now seen corresponding path program 1 times [2020-10-27 18:20:19,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:20:19,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176782109] [2020-10-27 18:20:19,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:20:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:19,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:20,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:21,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:21,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-27 18:20:21,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:20:21,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1447 [2020-10-27 18:20:21,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:21,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:20:21,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-27 18:20:21,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 18:20:21,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:20:21,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:20:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:21,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:21,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:21,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:20:21,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:20:21,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:20:21,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:21,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:20:21,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:20:21,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:20:21,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:20:21,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:20:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:21,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:21,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:21,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 18:20:21,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:20:21,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-27 18:20:21,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:21,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:20:21,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:20:21,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-27 18:20:21,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:20:21,738 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:20:21,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176782109] [2020-10-27 18:20:21,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:20:21,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:20:21,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723157180] [2020-10-27 18:20:21,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:20:21,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:20:21,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:20:21,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:20:21,744 INFO L87 Difference]: Start difference. First operand 1019 states and 1397 transitions. Second operand 5 states. [2020-10-27 18:20:31,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:20:31,764 INFO L93 Difference]: Finished difference Result 2658 states and 3734 transitions. [2020-10-27 18:20:31,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:20:31,765 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 179 [2020-10-27 18:20:31,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:20:31,777 INFO L225 Difference]: With dead ends: 2658 [2020-10-27 18:20:31,777 INFO L226 Difference]: Without dead ends: 1645 [2020-10-27 18:20:31,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:20:31,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2020-10-27 18:20:31,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1641. [2020-10-27 18:20:31,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1641 states. [2020-10-27 18:20:31,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2188 transitions. [2020-10-27 18:20:31,873 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2188 transitions. Word has length 179 [2020-10-27 18:20:31,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:20:31,874 INFO L481 AbstractCegarLoop]: Abstraction has 1641 states and 2188 transitions. [2020-10-27 18:20:31,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:20:31,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2188 transitions. [2020-10-27 18:20:31,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-27 18:20:31,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:20:31,878 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:31,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:20:31,879 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:20:31,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:20:31,880 INFO L82 PathProgramCache]: Analyzing trace with hash 855876633, now seen corresponding path program 1 times [2020-10-27 18:20:31,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:20:31,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627110419] [2020-10-27 18:20:31,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:20:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:31,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:32,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:32,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:32,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:33,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:33,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-27 18:20:33,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:20:33,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1652 [2020-10-27 18:20:33,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:33,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:20:33,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 132 [2020-10-27 18:20:33,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 18:20:33,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:20:33,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:20:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:33,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:33,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:33,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:20:33,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:20:33,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:20:33,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:33,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:20:33,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:20:33,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:20:33,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:20:33,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:20:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:33,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:33,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:33,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 18:20:33,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:20:33,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-27 18:20:33,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:33,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:20:33,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:20:33,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-27 18:20:33,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:20:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:20:34,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627110419] [2020-10-27 18:20:34,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:20:34,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:20:34,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888598531] [2020-10-27 18:20:34,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:20:34,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:20:34,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:20:34,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:20:34,111 INFO L87 Difference]: Start difference. First operand 1641 states and 2188 transitions. Second operand 5 states. [2020-10-27 18:20:43,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:20:43,860 INFO L93 Difference]: Finished difference Result 4526 states and 6166 transitions. [2020-10-27 18:20:43,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:20:43,862 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 186 [2020-10-27 18:20:43,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:20:43,888 INFO L225 Difference]: With dead ends: 4526 [2020-10-27 18:20:43,889 INFO L226 Difference]: Without dead ends: 2891 [2020-10-27 18:20:43,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:20:43,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2891 states. [2020-10-27 18:20:43,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2891 to 2578. [2020-10-27 18:20:43,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2578 states. [2020-10-27 18:20:44,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 3458 transitions. [2020-10-27 18:20:44,003 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 3458 transitions. Word has length 186 [2020-10-27 18:20:44,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:20:44,004 INFO L481 AbstractCegarLoop]: Abstraction has 2578 states and 3458 transitions. [2020-10-27 18:20:44,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:20:44,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 3458 transitions. [2020-10-27 18:20:44,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-27 18:20:44,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:20:44,010 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:44,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:20:44,010 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:20:44,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:20:44,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1388359104, now seen corresponding path program 1 times [2020-10-27 18:20:44,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:20:44,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705287375] [2020-10-27 18:20:44,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:20:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:44,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:44,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:45,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:46,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:46,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-27 18:20:46,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:20:46,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2734 [2020-10-27 18:20:46,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:46,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:20:46,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 160 [2020-10-27 18:20:46,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 18:20:46,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:20:46,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:20:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:46,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:46,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:46,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:20:46,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:20:46,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:20:46,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:46,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:20:46,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:20:46,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:20:46,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:20:46,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:20:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:47,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:47,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:47,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-27 18:20:47,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:20:47,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-27 18:20:47,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:47,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:20:47,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:20:47,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 145 [2020-10-27 18:20:47,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:20:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:20:47,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705287375] [2020-10-27 18:20:47,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:20:47,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:20:47,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682239095] [2020-10-27 18:20:47,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:20:47,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:20:47,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:20:47,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:20:47,337 INFO L87 Difference]: Start difference. First operand 2578 states and 3458 transitions. Second operand 5 states. [2020-10-27 18:20:58,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:20:58,120 INFO L93 Difference]: Finished difference Result 6399 states and 8713 transitions. [2020-10-27 18:20:58,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:20:58,121 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 213 [2020-10-27 18:20:58,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:20:58,143 INFO L225 Difference]: With dead ends: 6399 [2020-10-27 18:20:58,144 INFO L226 Difference]: Without dead ends: 3827 [2020-10-27 18:20:58,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:20:58,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2020-10-27 18:20:58,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 3821. [2020-10-27 18:20:58,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3821 states. [2020-10-27 18:20:58,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3821 states to 3821 states and 5103 transitions. [2020-10-27 18:20:58,279 INFO L78 Accepts]: Start accepts. Automaton has 3821 states and 5103 transitions. Word has length 213 [2020-10-27 18:20:58,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:20:58,280 INFO L481 AbstractCegarLoop]: Abstraction has 3821 states and 5103 transitions. [2020-10-27 18:20:58,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:20:58,280 INFO L276 IsEmpty]: Start isEmpty. Operand 3821 states and 5103 transitions. [2020-10-27 18:20:58,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-27 18:20:58,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:20:58,287 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:20:58,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:20:58,287 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:20:58,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:20:58,288 INFO L82 PathProgramCache]: Analyzing trace with hash -224306669, now seen corresponding path program 1 times [2020-10-27 18:20:58,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:20:58,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603764695] [2020-10-27 18:20:58,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:20:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:58,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:58,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:59,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:01,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:01,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-27 18:21:01,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:21:01,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3295 [2020-10-27 18:21:01,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:01,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:21:01,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 176 [2020-10-27 18:21:01,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 18:21:01,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:01,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:21:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:01,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:01,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:01,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:21:01,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:01,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:21:01,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:01,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:21:01,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:01,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:21:01,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:01,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:21:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:01,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:01,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:01,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 18:21:01,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:01,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 18:21:01,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:01,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:21:01,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:01,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:21:01,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:01,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-27 18:21:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:01,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:01,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:01,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 18:21:01,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:01,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-27 18:21:01,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:01,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:21:01,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:01,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 18:21:01,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-27 18:21:02,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603764695] [2020-10-27 18:21:02,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:21:02,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:21:02,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367642706] [2020-10-27 18:21:02,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:21:02,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:21:02,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:21:02,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:21:02,118 INFO L87 Difference]: Start difference. First operand 3821 states and 5103 transitions. Second operand 5 states. [2020-10-27 18:21:10,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:21:10,114 INFO L93 Difference]: Finished difference Result 8882 states and 12029 transitions. [2020-10-27 18:21:10,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:21:10,117 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 227 [2020-10-27 18:21:10,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:21:10,145 INFO L225 Difference]: With dead ends: 8882 [2020-10-27 18:21:10,146 INFO L226 Difference]: Without dead ends: 5067 [2020-10-27 18:21:10,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:21:10,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5067 states. [2020-10-27 18:21:10,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5067 to 5063. [2020-10-27 18:21:10,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5063 states. [2020-10-27 18:21:10,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5063 states to 5063 states and 6777 transitions. [2020-10-27 18:21:10,350 INFO L78 Accepts]: Start accepts. Automaton has 5063 states and 6777 transitions. Word has length 227 [2020-10-27 18:21:10,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:21:10,351 INFO L481 AbstractCegarLoop]: Abstraction has 5063 states and 6777 transitions. [2020-10-27 18:21:10,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:21:10,352 INFO L276 IsEmpty]: Start isEmpty. Operand 5063 states and 6777 transitions. [2020-10-27 18:21:10,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-10-27 18:21:10,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:21:10,360 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:21:10,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:21:10,361 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:21:10,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:21:10,363 INFO L82 PathProgramCache]: Analyzing trace with hash 318354135, now seen corresponding path program 1 times [2020-10-27 18:21:10,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:21:10,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147957751] [2020-10-27 18:21:10,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:21:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:10,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:10,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:10,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:13,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:14,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:15,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:15,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-27 18:21:15,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:21:15,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 18:21:15,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:15,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:21:15,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 191 [2020-10-27 18:21:15,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 18:21:15,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:21:15,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:21:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:15,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:15,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:15,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:21:15,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:15,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 18:21:15,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:15,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:21:15,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:15,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:21:15,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:21:15,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:21:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:15,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:15,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:15,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 18:21:15,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:15,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 18:21:15,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:15,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:21:15,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:15,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:21:15,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:15,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-27 18:21:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:15,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:15,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:15,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 18:21:15,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:15,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-27 18:21:15,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:15,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:21:15,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:15,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 18:21:15,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:16,112 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-27 18:21:16,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147957751] [2020-10-27 18:21:16,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:21:16,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:21:16,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370880941] [2020-10-27 18:21:16,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:21:16,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:21:16,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:21:16,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:21:16,115 INFO L87 Difference]: Start difference. First operand 5063 states and 6777 transitions. Second operand 5 states. [2020-10-27 18:21:23,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:21:23,454 INFO L93 Difference]: Finished difference Result 10149 states and 13617 transitions. [2020-10-27 18:21:23,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:21:23,456 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 242 [2020-10-27 18:21:23,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:21:23,484 INFO L225 Difference]: With dead ends: 10149 [2020-10-27 18:21:23,485 INFO L226 Difference]: Without dead ends: 5067 [2020-10-27 18:21:23,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:21:23,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5067 states. [2020-10-27 18:21:23,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5067 to 5063. [2020-10-27 18:21:23,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5063 states. [2020-10-27 18:21:23,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5063 states to 5063 states and 6765 transitions. [2020-10-27 18:21:23,693 INFO L78 Accepts]: Start accepts. Automaton has 5063 states and 6765 transitions. Word has length 242 [2020-10-27 18:21:23,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:21:23,694 INFO L481 AbstractCegarLoop]: Abstraction has 5063 states and 6765 transitions. [2020-10-27 18:21:23,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:21:23,694 INFO L276 IsEmpty]: Start isEmpty. Operand 5063 states and 6765 transitions. [2020-10-27 18:21:23,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-10-27 18:21:23,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:21:23,702 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:21:23,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:21:23,703 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:21:23,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:21:23,703 INFO L82 PathProgramCache]: Analyzing trace with hash -155835510, now seen corresponding path program 1 times [2020-10-27 18:21:23,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:21:23,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758228437] [2020-10-27 18:21:23,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:21:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:23,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:23,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:25,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:26,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:26,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 260 [2020-10-27 18:21:26,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:21:26,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2826 [2020-10-27 18:21:26,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:26,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:21:26,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 195 [2020-10-27 18:21:26,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 18:21:26,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:26,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:21:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:26,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:26,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:26,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:21:26,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:26,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:21:26,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:26,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:21:26,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:26,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:21:26,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:26,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:21:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:27,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:27,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:27,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-27 18:21:27,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:27,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-27 18:21:27,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:27,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:21:27,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:27,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 180 [2020-10-27 18:21:27,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:21:27,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758228437] [2020-10-27 18:21:27,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:21:27,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:21:27,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225560524] [2020-10-27 18:21:27,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:21:27,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:21:27,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:21:27,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:21:27,487 INFO L87 Difference]: Start difference. First operand 5063 states and 6765 transitions. Second operand 5 states. [2020-10-27 18:21:29,436 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-27 18:21:35,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:21:35,290 INFO L93 Difference]: Finished difference Result 10133 states and 13574 transitions. [2020-10-27 18:21:35,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:21:35,292 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 248 [2020-10-27 18:21:35,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:21:35,320 INFO L225 Difference]: With dead ends: 10133 [2020-10-27 18:21:35,320 INFO L226 Difference]: Without dead ends: 5067 [2020-10-27 18:21:35,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 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 18:21:35,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5067 states. [2020-10-27 18:21:35,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5067 to 5063. [2020-10-27 18:21:35,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5063 states. [2020-10-27 18:21:35,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5063 states to 5063 states and 6757 transitions. [2020-10-27 18:21:35,497 INFO L78 Accepts]: Start accepts. Automaton has 5063 states and 6757 transitions. Word has length 248 [2020-10-27 18:21:35,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:21:35,498 INFO L481 AbstractCegarLoop]: Abstraction has 5063 states and 6757 transitions. [2020-10-27 18:21:35,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:21:35,498 INFO L276 IsEmpty]: Start isEmpty. Operand 5063 states and 6757 transitions. [2020-10-27 18:21:35,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-10-27 18:21:35,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:21:35,508 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:21:35,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 18:21:35,508 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:21:35,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:21:35,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1722018031, now seen corresponding path program 1 times [2020-10-27 18:21:35,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:21:35,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864556517] [2020-10-27 18:21:35,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:21:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:35,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:35,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:35,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:35,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:37,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:37,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:40,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:40,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:40,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 270 [2020-10-27 18:21:40,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 18:21:40,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-27 18:21:40,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:40,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:21:40,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 204 [2020-10-27 18:21:40,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 18:21:40,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:40,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:21:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:40,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:40,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:40,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:21:40,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:40,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:21:40,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:40,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:21:40,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:40,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:21:40,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:40,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:21:40,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:40,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:40,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:40,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 18:21:40,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:40,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 18:21:40,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:40,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:21:40,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:40,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:21:40,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:40,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-27 18:21:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:40,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:41,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:41,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 18:21:41,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:41,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-27 18:21:41,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:41,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:21:41,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:41,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-27 18:21:41,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:21:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-10-27 18:21:41,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864556517] [2020-10-27 18:21:41,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:21:41,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:21:41,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844497194] [2020-10-27 18:21:41,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:21:41,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:21:41,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:21:41,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:21:41,213 INFO L87 Difference]: Start difference. First operand 5063 states and 6757 transitions. Second operand 5 states. [2020-10-27 18:21:51,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:21:51,545 INFO L93 Difference]: Finished difference Result 11060 states and 15218 transitions. [2020-10-27 18:21:51,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:21:51,546 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 256 [2020-10-27 18:21:51,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:21:51,572 INFO L225 Difference]: With dead ends: 11060 [2020-10-27 18:21:51,573 INFO L226 Difference]: Without dead ends: 6003 [2020-10-27 18:21:51,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:21:51,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6003 states. [2020-10-27 18:21:51,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6003 to 5997. [2020-10-27 18:21:51,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5997 states. [2020-10-27 18:21:51,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5997 states to 5997 states and 8174 transitions. [2020-10-27 18:21:51,749 INFO L78 Accepts]: Start accepts. Automaton has 5997 states and 8174 transitions. Word has length 256 [2020-10-27 18:21:51,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:21:51,750 INFO L481 AbstractCegarLoop]: Abstraction has 5997 states and 8174 transitions. [2020-10-27 18:21:51,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:21:51,750 INFO L276 IsEmpty]: Start isEmpty. Operand 5997 states and 8174 transitions. [2020-10-27 18:21:51,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-10-27 18:21:51,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:21:51,763 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 18:21:51,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 18:21:51,763 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:21:51,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:21:51,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1662011401, now seen corresponding path program 1 times [2020-10-27 18:21:51,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:21:51,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746712887] [2020-10-27 18:21:51,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:21:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:51,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:52,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:54,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:54,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 292 [2020-10-27 18:21:54,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:21:54,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2790 [2020-10-27 18:21:54,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:54,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:21:54,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 227 [2020-10-27 18:21:54,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 18:21:54,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:54,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:21:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:54,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:54,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:54,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:21:54,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:54,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:21:54,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:54,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:21:54,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:54,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:21:54,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:21:54,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:21:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:54,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:54,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:54,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 18:21:54,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:54,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 18:21:54,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:54,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:21:54,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:54,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:21:54,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:54,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-27 18:21:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:54,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:55,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:55,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 18:21:55,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:55,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-27 18:21:55,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:55,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:21:55,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:55,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 18:21:55,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-27 18:21:55,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746712887] [2020-10-27 18:21:55,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:21:55,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:21:55,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27543450] [2020-10-27 18:21:55,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:21:55,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:21:55,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:21:55,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:21:55,175 INFO L87 Difference]: Start difference. First operand 5997 states and 8174 transitions. Second operand 5 states. [2020-10-27 18:22:06,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:22:06,445 INFO L93 Difference]: Finished difference Result 17560 states and 24555 transitions. [2020-10-27 18:22:06,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:22:06,450 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 278 [2020-10-27 18:22:06,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:22:06,510 INFO L225 Difference]: With dead ends: 17560 [2020-10-27 18:22:06,510 INFO L226 Difference]: Without dead ends: 11569 [2020-10-27 18:22:06,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:22:06,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11569 states. [2020-10-27 18:22:06,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11569 to 11565. [2020-10-27 18:22:06,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11565 states. [2020-10-27 18:22:06,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11565 states to 11565 states and 15598 transitions. [2020-10-27 18:22:06,903 INFO L78 Accepts]: Start accepts. Automaton has 11565 states and 15598 transitions. Word has length 278 [2020-10-27 18:22:06,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:22:06,904 INFO L481 AbstractCegarLoop]: Abstraction has 11565 states and 15598 transitions. [2020-10-27 18:22:06,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:22:06,904 INFO L276 IsEmpty]: Start isEmpty. Operand 11565 states and 15598 transitions. [2020-10-27 18:22:06,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-10-27 18:22:06,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:22:06,930 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:06,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 18:22:06,931 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:22:06,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:22:06,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1061651377, now seen corresponding path program 1 times [2020-10-27 18:22:06,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:22:06,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323626325] [2020-10-27 18:22:06,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:22:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:07,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:07,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:09,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:10,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:11,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:11,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 346 [2020-10-27 18:22:11,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:22:11,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 18:22:11,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:11,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:22:11,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 281 [2020-10-27 18:22:11,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 18:22:11,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:12,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:22:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:12,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:12,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:12,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:22:12,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:22:12,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 18:22:12,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:12,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:22:12,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:22:12,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:22:12,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:12,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:22:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:12,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:12,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:12,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 18:22:12,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:22:12,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 18:22:12,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:12,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:22:12,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:22:12,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:22:12,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:12,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-27 18:22:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:12,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:12,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:12,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-27 18:22:12,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:22:12,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-27 18:22:12,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:12,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:22:12,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:22:12,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-27 18:22:12,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:12,630 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-10-27 18:22:12,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323626325] [2020-10-27 18:22:12,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:22:12,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:22:12,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283163962] [2020-10-27 18:22:12,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:22:12,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:22:12,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:22:12,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:22:12,633 INFO L87 Difference]: Start difference. First operand 11565 states and 15598 transitions. Second operand 5 states. [2020-10-27 18:22:23,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:22:23,597 INFO L93 Difference]: Finished difference Result 31498 states and 43428 transitions. [2020-10-27 18:22:23,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:22:23,601 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 332 [2020-10-27 18:22:23,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:22:23,715 INFO L225 Difference]: With dead ends: 31498 [2020-10-27 18:22:23,716 INFO L226 Difference]: Without dead ends: 19939 [2020-10-27 18:22:23,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:22:23,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19939 states. [2020-10-27 18:22:24,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19939 to 19918. [2020-10-27 18:22:24,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19918 states. [2020-10-27 18:22:24,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19918 states to 19918 states and 27330 transitions. [2020-10-27 18:22:24,406 INFO L78 Accepts]: Start accepts. Automaton has 19918 states and 27330 transitions. Word has length 332 [2020-10-27 18:22:24,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:22:24,407 INFO L481 AbstractCegarLoop]: Abstraction has 19918 states and 27330 transitions. [2020-10-27 18:22:24,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:22:24,408 INFO L276 IsEmpty]: Start isEmpty. Operand 19918 states and 27330 transitions. [2020-10-27 18:22:24,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-10-27 18:22:24,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:22:24,452 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:24,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 18:22:24,453 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:22:24,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:22:24,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1170437961, now seen corresponding path program 1 times [2020-10-27 18:22:24,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:22:24,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986835048] [2020-10-27 18:22:24,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:22:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:24,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:24,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:24,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:29,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:29,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 406 [2020-10-27 18:22:29,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:22:29,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 18:22:29,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:29,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 18:22:29,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-27 18:22:29,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 18:22:29,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:29,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:22:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:29,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:29,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:29,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:22:29,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:22:29,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 18:22:29,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:29,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:22:29,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:22:29,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:22:29,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:29,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:22:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:29,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:29,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:29,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 18:22:29,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:22:29,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-27 18:22:29,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:29,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:22:29,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:22:29,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 18:22:29,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:29,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-27 18:22:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:29,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:30,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:30,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:30,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-27 18:22:30,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:22:30,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 831 [2020-10-27 18:22:30,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:30,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 18:22:30,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:22:30,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 247 [2020-10-27 18:22:30,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:31,119 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-10-27 18:22:31,295 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-10-27 18:22:31,460 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-10-27 18:22:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:22:32,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986835048] [2020-10-27 18:22:32,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:22:32,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 18:22:32,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727196850] [2020-10-27 18:22:32,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 18:22:32,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:22:32,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 18:22:32,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 18:22:32,383 INFO L87 Difference]: Start difference. First operand 19918 states and 27330 transitions. Second operand 10 states. [2020-10-27 18:22:32,751 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2020-10-27 18:22:33,113 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2020-10-27 18:22:33,772 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2020-10-27 18:22:34,032 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 72 [2020-10-27 18:22:34,722 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-27 18:22:35,156 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2020-10-27 18:22:35,807 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2020-10-27 18:22:37,458 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2020-10-27 18:22:38,867 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-27 18:22:39,173 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-27 18:22:48,087 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2020-10-27 18:22:49,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:22:49,427 INFO L93 Difference]: Finished difference Result 40600 states and 56520 transitions. [2020-10-27 18:22:49,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 18:22:49,429 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 392 [2020-10-27 18:22:49,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:22:49,523 INFO L225 Difference]: With dead ends: 40600 [2020-10-27 18:22:49,523 INFO L226 Difference]: Without dead ends: 20555 [2020-10-27 18:22:49,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2020-10-27 18:22:49,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20555 states. [2020-10-27 18:22:50,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20555 to 19993. [2020-10-27 18:22:50,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19993 states. [2020-10-27 18:22:50,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19993 states to 19993 states and 27853 transitions. [2020-10-27 18:22:50,186 INFO L78 Accepts]: Start accepts. Automaton has 19993 states and 27853 transitions. Word has length 392 [2020-10-27 18:22:50,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:22:50,186 INFO L481 AbstractCegarLoop]: Abstraction has 19993 states and 27853 transitions. [2020-10-27 18:22:50,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 18:22:50,186 INFO L276 IsEmpty]: Start isEmpty. Operand 19993 states and 27853 transitions. [2020-10-27 18:22:50,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-10-27 18:22:50,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:22:50,243 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-27 18:22:50,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 18:22:50,243 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:22:50,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:22:50,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1083818851, now seen corresponding path program 1 times [2020-10-27 18:22:50,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:22:50,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196185637] [2020-10-27 18:22:50,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:22:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:50,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:54,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:55,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:55,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 466 [2020-10-27 18:22:55,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:22:55,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 18:22:55,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:55,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:22:55,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 401 [2020-10-27 18:22:55,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 18:22:55,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:55,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:22:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:55,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:55,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:55,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:22:55,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:22:55,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:22:55,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:55,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:22:55,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:22:55,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:22:55,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:55,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:22:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:55,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:55,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:55,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 18:22:55,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:22:55,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 18:22:55,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:55,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:22:55,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:22:55,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:22:55,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:55,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-27 18:22:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:55,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:55,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:55,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 18:22:55,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:22:55,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 18:22:55,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:55,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:22:55,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:22:55,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:22:55,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:55,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-10-27 18:22:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:55,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:56,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:56,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 18:22:56,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:22:56,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-27 18:22:56,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:56,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:22:56,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:22:56,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 167 [2020-10-27 18:22:56,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 168 proven. 3 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2020-10-27 18:22:56,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196185637] [2020-10-27 18:22:56,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:22:56,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:22:56,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245139282] [2020-10-27 18:22:56,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:22:56,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:22:56,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:22:56,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:22:56,240 INFO L87 Difference]: Start difference. First operand 19993 states and 27853 transitions. Second operand 5 states. [2020-10-27 18:23:06,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:23:06,704 INFO L93 Difference]: Finished difference Result 48365 states and 68378 transitions. [2020-10-27 18:23:06,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:23:06,706 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 450 [2020-10-27 18:23:06,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:23:06,836 INFO L225 Difference]: With dead ends: 48365 [2020-10-27 18:23:06,836 INFO L226 Difference]: Without dead ends: 28378 [2020-10-27 18:23:06,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:23:06,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28378 states. [2020-10-27 18:23:07,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28378 to 28352. [2020-10-27 18:23:07,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28352 states. [2020-10-27 18:23:07,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28352 states to 28352 states and 39929 transitions. [2020-10-27 18:23:07,812 INFO L78 Accepts]: Start accepts. Automaton has 28352 states and 39929 transitions. Word has length 450 [2020-10-27 18:23:07,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:23:07,813 INFO L481 AbstractCegarLoop]: Abstraction has 28352 states and 39929 transitions. [2020-10-27 18:23:07,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:23:07,813 INFO L276 IsEmpty]: Start isEmpty. Operand 28352 states and 39929 transitions. [2020-10-27 18:23:07,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-10-27 18:23:07,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:23:07,875 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-27 18:23:07,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 18:23:07,875 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:23:07,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:23:07,876 INFO L82 PathProgramCache]: Analyzing trace with hash -994496973, now seen corresponding path program 1 times [2020-10-27 18:23:07,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:23:07,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798920193] [2020-10-27 18:23:07,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:23:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:23:07,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:23:08,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:23:08,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:23:08,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:23:09,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:23:12,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:23:12,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 481 [2020-10-27 18:23:12,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:23:12,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 18:23:12,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:23:12,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:23:12,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 168 [2020-10-27 18:23:12,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 18:23:12,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:23:13,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:23:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:23:13,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:23:13,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:23:13,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:23:13,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:23:13,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:23:13,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:23:13,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:23:13,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:23:13,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:23:13,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:23:13,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:23:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:23:13,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:23:13,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:23:13,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 18:23:13,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:23:13,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 18:23:13,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:23:13,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:23:13,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:23:13,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:23:13,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:23:13,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-27 18:23:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:23:13,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:23:13,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:23:13,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 18:23:13,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:23:13,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-27 18:23:13,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:23:13,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:23:13,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:23:13,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 18:23:13,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:23:13,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-10-27 18:23:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:23:13,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:23:13,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:23:13,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:23:13,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-27 18:23:13,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:23:13,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 420 [2020-10-27 18:23:13,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:23:13,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:23:13,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:23:13,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 247 [2020-10-27 18:23:13,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:23:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 320 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-27 18:23:14,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798920193] [2020-10-27 18:23:14,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:23:14,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:23:14,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554369656] [2020-10-27 18:23:14,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:23:14,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:23:14,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:23:14,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:23:14,181 INFO L87 Difference]: Start difference. First operand 28352 states and 39929 transitions. Second operand 7 states. [2020-10-27 18:23:16,622 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 73