/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 10:36:43,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 10:36:43,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 10:36:43,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 10:36:43,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 10:36:43,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 10:36:43,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 10:36:43,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 10:36:43,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 10:36:43,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 10:36:43,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 10:36:43,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 10:36:43,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 10:36:43,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 10:36:43,219 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 10:36:43,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 10:36:43,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 10:36:43,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 10:36:43,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 10:36:43,237 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 10:36:43,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 10:36:43,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 10:36:43,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 10:36:43,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 10:36:43,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 10:36:43,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 10:36:43,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 10:36:43,258 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 10:36:43,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 10:36:43,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 10:36:43,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 10:36:43,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 10:36:43,266 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 10:36:43,267 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 10:36:43,268 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 10:36:43,268 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 10:36:43,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 10:36:43,269 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 10:36:43,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 10:36:43,270 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 10:36:43,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 10:36:43,278 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 10:36:43,336 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 10:36:43,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 10:36:43,341 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 10:36:43,342 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 10:36:43,342 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 10:36:43,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 10:36:43,342 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 10:36:43,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 10:36:43,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 10:36:43,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 10:36:43,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 10:36:43,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 10:36:43,345 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 10:36:43,345 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 10:36:43,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 10:36:43,345 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 10:36:43,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 10:36:43,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 10:36:43,346 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 10:36:43,346 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 10:36:43,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 10:36:43,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:36:43,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 10:36:43,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 10:36:43,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 10:36:43,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 10:36:43,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 10:36:43,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 10:36:43,348 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 10:36:43,348 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 10:36:43,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 10:36:43,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 10:36:43,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 10:36:43,794 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 10:36:43,795 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 10:36:43,796 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label54.c [2020-10-28 10:36:43,881 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b0bddead7/7304af01087846e8aaab4085638cf322/FLAG6bab2463b [2020-10-28 10:36:44,876 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 10:36:44,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem04_label54.c [2020-10-28 10:36:44,923 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b0bddead7/7304af01087846e8aaab4085638cf322/FLAG6bab2463b [2020-10-28 10:36:45,287 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b0bddead7/7304af01087846e8aaab4085638cf322 [2020-10-28 10:36:45,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 10:36:45,300 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 10:36:45,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 10:36:45,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 10:36:45,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 10:36:45,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:36:45" (1/1) ... [2020-10-28 10:36:45,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7570d9ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:36:45, skipping insertion in model container [2020-10-28 10:36:45,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:36:45" (1/1) ... [2020-10-28 10:36:45,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 10:36:45,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 10:36:46,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:36:46,898 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 10:36:47,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:36:47,627 INFO L208 MainTranslator]: Completed translation [2020-10-28 10:36:47,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:36:47 WrapperNode [2020-10-28 10:36:47,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 10:36:47,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 10:36:47,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 10:36:47,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 10:36:47,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:36:47" (1/1) ... [2020-10-28 10:36:47,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:36:47" (1/1) ... [2020-10-28 10:36:47,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:36:47" (1/1) ... [2020-10-28 10:36:47,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:36:47" (1/1) ... [2020-10-28 10:36:47,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:36:47" (1/1) ... [2020-10-28 10:36:47,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:36:47" (1/1) ... [2020-10-28 10:36:47,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:36:47" (1/1) ... [2020-10-28 10:36:47,934 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 10:36:47,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 10:36:47,935 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 10:36:47,935 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 10:36:47,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:36:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:36:48,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 10:36:48,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 10:36:48,021 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 10:36:48,021 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 10:36:48,021 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 10:36:48,021 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 10:36:48,021 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 10:36:48,022 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 10:36:48,022 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 10:36:48,022 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 10:36:48,022 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 10:36:48,022 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 10:36:48,022 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 10:36:48,023 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 10:36:48,023 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 10:36:48,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 10:36:48,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 10:36:48,023 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 10:36:48,023 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 10:36:48,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 10:36:48,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 10:36:48,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 10:36:48,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 10:36:48,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 10:36:48,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 10:36:53,262 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 10:36:53,263 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 10:36:53,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:36:53 BoogieIcfgContainer [2020-10-28 10:36:53,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 10:36:53,271 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 10:36:53,271 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 10:36:53,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 10:36:53,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:36:45" (1/3) ... [2020-10-28 10:36:53,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3b18f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:36:53, skipping insertion in model container [2020-10-28 10:36:53,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:36:47" (2/3) ... [2020-10-28 10:36:53,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3b18f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:36:53, skipping insertion in model container [2020-10-28 10:36:53,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:36:53" (3/3) ... [2020-10-28 10:36:53,278 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label54.c [2020-10-28 10:36:53,291 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 10:36:53,297 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 10:36:53,310 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 10:36:53,360 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 10:36:53,360 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 10:36:53,361 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 10:36:53,361 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 10:36:53,361 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 10:36:53,361 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 10:36:53,361 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 10:36:53,361 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 10:36:53,402 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-10-28 10:36:53,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 818 [2020-10-28 10:36:53,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:36:53,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:36:53,465 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:36:53,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:36:53,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1720178832, now seen corresponding path program 1 times [2020-10-28 10:36:53,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:36:53,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248919989] [2020-10-28 10:36:53,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:36:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:36:54,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:36:55,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:36:59,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:36:59,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 833 [2020-10-28 10:36:59,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:36:59,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 10:36:59,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:36:59,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:36:59,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 10:36:59,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:36:59,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 824 [2020-10-28 10:36:59,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 10:37:00,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:37:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:37:00,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:00,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:37:00,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:37:00,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:37:00,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 10:37:00,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:37:00,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:37:00,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:37:00,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:37:00,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:37:00,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:37:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:37:01,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248919989] [2020-10-28 10:37:01,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:37:01,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 10:37:01,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814091422] [2020-10-28 10:37:01,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:37:01,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:37:01,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:37:01,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:37:01,875 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 5 states. [2020-10-28 10:37:12,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:37:12,439 INFO L93 Difference]: Finished difference Result 2677 states and 5143 transitions. [2020-10-28 10:37:12,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:37:12,442 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 817 [2020-10-28 10:37:12,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:37:12,485 INFO L225 Difference]: With dead ends: 2677 [2020-10-28 10:37:12,485 INFO L226 Difference]: Without dead ends: 1703 [2020-10-28 10:37:12,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:37:12,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2020-10-28 10:37:12,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1690. [2020-10-28 10:37:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2020-10-28 10:37:12,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 3006 transitions. [2020-10-28 10:37:12,684 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 3006 transitions. Word has length 817 [2020-10-28 10:37:12,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:37:12,687 INFO L481 AbstractCegarLoop]: Abstraction has 1690 states and 3006 transitions. [2020-10-28 10:37:12,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:37:12,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 3006 transitions. [2020-10-28 10:37:12,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2020-10-28 10:37:12,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:37:12,723 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:37:12,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 10:37:12,724 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:37:12,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:37:12,725 INFO L82 PathProgramCache]: Analyzing trace with hash -894901010, now seen corresponding path program 1 times [2020-10-28 10:37:12,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:37:12,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243326869] [2020-10-28 10:37:12,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:37:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:37:12,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:14,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:17,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:17,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:37:17,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 843 [2020-10-28 10:37:17,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:37:17,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 10:37:17,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:37:17,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:37:17,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:37:17,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:37:17,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 10:37:17,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 10:37:18,313 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 10:37:18,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:37:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:37:18,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:18,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:37:18,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:37:18,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:37:18,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 10:37:18,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:37:18,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:37:18,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:37:18,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:37:18,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:37:18,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:37:18,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:37:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:37:18,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:18,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:37:18,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 10:37:18,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:37:18,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 10:37:18,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:37:18,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:37:18,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:37:18,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:37:18,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 10:37:18,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:37:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:37:18,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243326869] [2020-10-28 10:37:18,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:37:18,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 10:37:18,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105933836] [2020-10-28 10:37:18,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:37:18,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:37:18,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:37:18,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:37:18,972 INFO L87 Difference]: Start difference. First operand 1690 states and 3006 transitions. Second operand 8 states. [2020-10-28 10:37:19,114 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-28 10:37:26,443 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-28 10:37:33,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:37:33,355 INFO L93 Difference]: Finished difference Result 5178 states and 9251 transitions. [2020-10-28 10:37:33,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:37:33,356 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 825 [2020-10-28 10:37:33,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:37:33,382 INFO L225 Difference]: With dead ends: 5178 [2020-10-28 10:37:33,382 INFO L226 Difference]: Without dead ends: 3494 [2020-10-28 10:37:33,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-28 10:37:33,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3494 states. [2020-10-28 10:37:33,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3494 to 3438. [2020-10-28 10:37:33,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3438 states. [2020-10-28 10:37:33,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 5380 transitions. [2020-10-28 10:37:33,545 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 5380 transitions. Word has length 825 [2020-10-28 10:37:33,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:37:33,546 INFO L481 AbstractCegarLoop]: Abstraction has 3438 states and 5380 transitions. [2020-10-28 10:37:33,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 10:37:33,546 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 5380 transitions. [2020-10-28 10:37:33,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2020-10-28 10:37:33,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:37:33,563 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:37:33,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 10:37:33,563 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:37:33,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:37:33,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1830396499, now seen corresponding path program 1 times [2020-10-28 10:37:33,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:37:33,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626663731] [2020-10-28 10:37:33,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:37:33,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:37:33,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:34,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:37,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:38,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:37:38,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 848 [2020-10-28 10:37:38,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:37:38,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 10:37:38,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:37:38,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:37:38,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:37:38,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:37:38,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 10:37:38,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 10:37:38,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:37:38,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:37:38,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:38,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:37:38,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:37:38,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:37:38,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 10:37:38,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:37:38,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:37:38,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:37:38,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:37:38,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:37:38,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:37:38,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:37:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:37:38,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:39,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:37:39,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 10:37:39,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:37:39,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 10:37:39,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:37:39,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:37:39,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:37:39,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:37:39,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 10:37:39,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:37:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:37:39,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626663731] [2020-10-28 10:37:39,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:37:39,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:37:39,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933189504] [2020-10-28 10:37:39,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:37:39,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:37:39,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:37:39,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:37:39,431 INFO L87 Difference]: Start difference. First operand 3438 states and 5380 transitions. Second operand 7 states. [2020-10-28 10:37:39,569 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:37:52,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:37:52,803 INFO L93 Difference]: Finished difference Result 10599 states and 16930 transitions. [2020-10-28 10:37:52,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:37:52,804 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 830 [2020-10-28 10:37:52,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:37:52,848 INFO L225 Difference]: With dead ends: 10599 [2020-10-28 10:37:52,852 INFO L226 Difference]: Without dead ends: 7167 [2020-10-28 10:37:52,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:37:52,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7167 states. [2020-10-28 10:37:53,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7167 to 6995. [2020-10-28 10:37:53,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6995 states. [2020-10-28 10:37:53,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6995 states to 6995 states and 9959 transitions. [2020-10-28 10:37:53,166 INFO L78 Accepts]: Start accepts. Automaton has 6995 states and 9959 transitions. Word has length 830 [2020-10-28 10:37:53,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:37:53,166 INFO L481 AbstractCegarLoop]: Abstraction has 6995 states and 9959 transitions. [2020-10-28 10:37:53,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:37:53,167 INFO L276 IsEmpty]: Start isEmpty. Operand 6995 states and 9959 transitions. [2020-10-28 10:37:53,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 835 [2020-10-28 10:37:53,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:37:53,197 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:37:53,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 10:37:53,198 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:37:53,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:37:53,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1831030299, now seen corresponding path program 1 times [2020-10-28 10:37:53,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:37:53,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590289220] [2020-10-28 10:37:53,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:37:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:37:53,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:54,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:57,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:58,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:37:58,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 852 [2020-10-28 10:37:58,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:37:58,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-28 10:37:58,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:37:58,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:37:58,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:37:58,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:37:58,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 10:37:58,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:37:58,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:37:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:37:58,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:58,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:37:58,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:37:58,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:37:58,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 10:37:58,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:37:58,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:37:58,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:37:58,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:37:58,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:37:58,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 10:37:58,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:37:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:37:58,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:37:58,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:37:58,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 10:37:58,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:37:58,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 10:37:58,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:37:58,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:37:58,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:37:58,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:37:58,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 10:37:58,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:37:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:37:59,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590289220] [2020-10-28 10:37:59,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:37:59,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:37:59,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796955540] [2020-10-28 10:37:59,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:37:59,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:37:59,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:37:59,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:37:59,027 INFO L87 Difference]: Start difference. First operand 6995 states and 9959 transitions. Second operand 7 states. [2020-10-28 10:37:59,164 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-28 10:38:12,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:38:12,191 INFO L93 Difference]: Finished difference Result 17727 states and 25488 transitions. [2020-10-28 10:38:12,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:38:12,192 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 834 [2020-10-28 10:38:12,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:38:12,243 INFO L225 Difference]: With dead ends: 17727 [2020-10-28 10:38:12,244 INFO L226 Difference]: Without dead ends: 10738 [2020-10-28 10:38:12,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:38:12,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10738 states. [2020-10-28 10:38:12,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10738 to 10634. [2020-10-28 10:38:12,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10634 states. [2020-10-28 10:38:12,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10634 states to 10634 states and 14419 transitions. [2020-10-28 10:38:12,566 INFO L78 Accepts]: Start accepts. Automaton has 10634 states and 14419 transitions. Word has length 834 [2020-10-28 10:38:12,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:38:12,566 INFO L481 AbstractCegarLoop]: Abstraction has 10634 states and 14419 transitions. [2020-10-28 10:38:12,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:38:12,566 INFO L276 IsEmpty]: Start isEmpty. Operand 10634 states and 14419 transitions. [2020-10-28 10:38:12,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2020-10-28 10:38:12,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:38:12,604 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:38:12,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 10:38:12,604 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:38:12,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:38:12,605 INFO L82 PathProgramCache]: Analyzing trace with hash 109969680, now seen corresponding path program 1 times [2020-10-28 10:38:12,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:38:12,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999818358] [2020-10-28 10:38:12,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:38:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:12,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:13,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:15,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:18,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:18,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:18,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 871 [2020-10-28 10:38:18,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:38:18,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5373 [2020-10-28 10:38:18,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:18,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:18,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:38:18,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 10:38:18,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 10:38:18,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:18,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:38:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:18,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:18,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:18,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:38:18,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:18,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:38:18,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:18,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:18,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:38:18,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:38:18,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:38:18,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:18,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:38:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:18,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:18,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:18,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 10:38:18,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:18,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 10:38:18,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:18,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:18,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:38:18,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:38:18,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 10:38:18,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:18,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 10:38:18,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:18,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:18,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:18,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 10:38:18,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:18,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 10:38:18,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:18,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:18,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:38:18,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:38:18,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 10:38:18,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 10:38:18,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999818358] [2020-10-28 10:38:18,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:38:18,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:38:18,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309611723] [2020-10-28 10:38:18,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:38:18,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:38:18,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:38:18,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:38:18,894 INFO L87 Difference]: Start difference. First operand 10634 states and 14419 transitions. Second operand 7 states. [2020-10-28 10:38:19,036 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-28 10:38:21,971 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-28 10:38:31,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:38:31,738 INFO L93 Difference]: Finished difference Result 25721 states and 34813 transitions. [2020-10-28 10:38:31,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 10:38:31,739 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 851 [2020-10-28 10:38:31,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:38:31,812 INFO L225 Difference]: With dead ends: 25721 [2020-10-28 10:38:31,812 INFO L226 Difference]: Without dead ends: 15093 [2020-10-28 10:38:31,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-28 10:38:31,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15093 states. [2020-10-28 10:38:32,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15093 to 14928. [2020-10-28 10:38:32,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14928 states. [2020-10-28 10:38:32,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14928 states to 14928 states and 19396 transitions. [2020-10-28 10:38:32,259 INFO L78 Accepts]: Start accepts. Automaton has 14928 states and 19396 transitions. Word has length 851 [2020-10-28 10:38:32,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:38:32,259 INFO L481 AbstractCegarLoop]: Abstraction has 14928 states and 19396 transitions. [2020-10-28 10:38:32,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:38:32,260 INFO L276 IsEmpty]: Start isEmpty. Operand 14928 states and 19396 transitions. [2020-10-28 10:38:32,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 854 [2020-10-28 10:38:32,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:38:32,311 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:38:32,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 10:38:32,311 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:38:32,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:38:32,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1785522828, now seen corresponding path program 1 times [2020-10-28 10:38:32,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:38:32,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099722283] [2020-10-28 10:38:32,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:38:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:32,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:35,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:36,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:36,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 873 [2020-10-28 10:38:36,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:38:36,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3710 [2020-10-28 10:38:36,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:36,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:36,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 10:38:36,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 10:38:36,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 821 [2020-10-28 10:38:36,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:36,665 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 10:38:36,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:38:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:36,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:36,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:36,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:38:36,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:36,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 10:38:36,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:36,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:36,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:38:36,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:38:36,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:38:36,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:36,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:38:36,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:36,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:36,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:36,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:38:36,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:36,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:38:36,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:36,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:36,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:38:36,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:38:36,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:38:36,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:36,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 10:38:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:36,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:36,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:36,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 10:38:36,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:36,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 10:38:36,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:36,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:36,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:38:36,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:38:36,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 10:38:36,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-28 10:38:37,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099722283] [2020-10-28 10:38:37,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:38:37,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:38:37,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870517440] [2020-10-28 10:38:37,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:38:37,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:38:37,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:38:37,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:38:37,349 INFO L87 Difference]: Start difference. First operand 14928 states and 19396 transitions. Second operand 5 states. [2020-10-28 10:38:37,731 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:38:49,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:38:49,134 INFO L93 Difference]: Finished difference Result 35815 states and 48570 transitions. [2020-10-28 10:38:49,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:38:49,135 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 853 [2020-10-28 10:38:49,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:38:49,210 INFO L225 Difference]: With dead ends: 35815 [2020-10-28 10:38:49,210 INFO L226 Difference]: Without dead ends: 20893 [2020-10-28 10:38:49,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:38:49,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20893 states. [2020-10-28 10:38:49,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20893 to 20863. [2020-10-28 10:38:49,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20863 states. [2020-10-28 10:38:49,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20863 states to 20863 states and 26253 transitions. [2020-10-28 10:38:49,706 INFO L78 Accepts]: Start accepts. Automaton has 20863 states and 26253 transitions. Word has length 853 [2020-10-28 10:38:49,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:38:49,707 INFO L481 AbstractCegarLoop]: Abstraction has 20863 states and 26253 transitions. [2020-10-28 10:38:49,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:38:49,707 INFO L276 IsEmpty]: Start isEmpty. Operand 20863 states and 26253 transitions. [2020-10-28 10:38:49,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 910 [2020-10-28 10:38:49,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:38:49,776 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:38:49,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 10:38:49,776 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:38:49,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:38:49,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1545820036, now seen corresponding path program 1 times [2020-10-28 10:38:49,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:38:49,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854273845] [2020-10-28 10:38:49,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:38:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:50,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:50,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:53,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:54,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:54,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 929 [2020-10-28 10:38:54,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:38:54,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 10:38:55,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:55,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:55,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:38:55,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 10:38:55,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 10:38:55,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:55,269 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 10:38:55,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:38:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:55,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:55,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:55,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:38:55,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:55,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:38:55,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:55,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:55,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:38:55,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:38:55,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:38:55,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:55,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:38:55,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:55,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:55,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:55,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:38:55,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:55,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 10:38:55,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:55,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:55,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:38:55,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:38:55,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 10:38:55,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:55,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 10:38:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:55,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:55,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:55,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 10:38:55,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:55,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-28 10:38:55,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:55,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:55,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:38:55,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:38:55,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 10:38:55,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:38:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 10:38:56,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854273845] [2020-10-28 10:38:56,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:38:56,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:38:56,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271929128] [2020-10-28 10:38:56,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:38:56,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:38:56,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:38:56,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:38:56,055 INFO L87 Difference]: Start difference. First operand 20863 states and 26253 transitions. Second operand 7 states. [2020-10-28 10:38:56,312 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:38:59,778 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-28 10:39:12,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:39:12,630 INFO L93 Difference]: Finished difference Result 59116 states and 79548 transitions. [2020-10-28 10:39:12,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 10:39:12,630 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 909 [2020-10-28 10:39:12,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:39:12,940 INFO L225 Difference]: With dead ends: 59116 [2020-10-28 10:39:12,940 INFO L226 Difference]: Without dead ends: 38259 [2020-10-28 10:39:12,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:39:13,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38259 states. [2020-10-28 10:39:13,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38259 to 37164. [2020-10-28 10:39:13,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37164 states. [2020-10-28 10:39:13,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37164 states to 37164 states and 47384 transitions. [2020-10-28 10:39:13,984 INFO L78 Accepts]: Start accepts. Automaton has 37164 states and 47384 transitions. Word has length 909 [2020-10-28 10:39:13,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:39:13,984 INFO L481 AbstractCegarLoop]: Abstraction has 37164 states and 47384 transitions. [2020-10-28 10:39:13,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:39:13,985 INFO L276 IsEmpty]: Start isEmpty. Operand 37164 states and 47384 transitions. [2020-10-28 10:39:14,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 962 [2020-10-28 10:39:14,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:39:14,067 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:39:14,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 10:39:14,067 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:39:14,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:39:14,068 INFO L82 PathProgramCache]: Analyzing trace with hash 512596772, now seen corresponding path program 1 times [2020-10-28 10:39:14,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:39:14,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612843097] [2020-10-28 10:39:14,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:39:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:14,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:16,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:19,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:19,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 981 [2020-10-28 10:39:19,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:39:19,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-28 10:39:19,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:19,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:19,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 10:39:19,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 156 [2020-10-28 10:39:19,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 821 [2020-10-28 10:39:19,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:19,849 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 10:39:19,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:39:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:19,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:19,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:19,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:39:19,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:39:19,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:39:19,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:19,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:19,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:39:19,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:39:19,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:39:19,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:19,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:39:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:19,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:19,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:19,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:39:19,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:39:19,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 10:39:19,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:19,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:19,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:39:19,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:39:19,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:39:19,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:19,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 10:39:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:19,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:20,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:20,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-28 10:39:20,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:39:20,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-28 10:39:20,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:20,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:20,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:39:20,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:39:20,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-28 10:39:20,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 10:39:20,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612843097] [2020-10-28 10:39:20,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:39:20,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:39:20,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680473233] [2020-10-28 10:39:20,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:39:20,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:39:20,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:39:20,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:39:20,844 INFO L87 Difference]: Start difference. First operand 37164 states and 47384 transitions. Second operand 5 states. [2020-10-28 10:39:21,600 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:39:33,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:39:33,892 INFO L93 Difference]: Finished difference Result 88596 states and 116350 transitions. [2020-10-28 10:39:33,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:39:33,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 961 [2020-10-28 10:39:33,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:39:34,106 INFO L225 Difference]: With dead ends: 88596 [2020-10-28 10:39:34,106 INFO L226 Difference]: Without dead ends: 51438 [2020-10-28 10:39:34,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:39:34,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51438 states. [2020-10-28 10:39:35,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51438 to 48922. [2020-10-28 10:39:35,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48922 states. [2020-10-28 10:39:35,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48922 states to 48922 states and 61383 transitions. [2020-10-28 10:39:35,524 INFO L78 Accepts]: Start accepts. Automaton has 48922 states and 61383 transitions. Word has length 961 [2020-10-28 10:39:35,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:39:35,526 INFO L481 AbstractCegarLoop]: Abstraction has 48922 states and 61383 transitions. [2020-10-28 10:39:35,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:39:35,526 INFO L276 IsEmpty]: Start isEmpty. Operand 48922 states and 61383 transitions. [2020-10-28 10:39:35,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 978 [2020-10-28 10:39:35,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:39:35,620 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:39:35,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 10:39:35,621 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:39:35,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:39:35,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1703931998, now seen corresponding path program 1 times [2020-10-28 10:39:35,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:39:35,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634596261] [2020-10-28 10:39:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:39:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:35,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:35,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:35,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:37,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:40,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:40,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 999 [2020-10-28 10:39:40,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:39:40,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-10-28 10:39:40,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:40,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:40,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:39:40,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 10:39:40,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-28 10:39:40,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:40,994 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 10:39:40,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:39:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:40,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:41,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:41,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:39:41,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:39:41,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:39:41,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:41,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:41,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:39:41,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:39:41,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:39:41,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:41,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:39:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:41,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:41,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:41,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 10:39:41,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:39:41,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 10:39:41,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:41,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:41,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:39:41,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:39:41,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 10:39:41,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:41,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 10:39:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:41,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:41,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:41,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:41,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 10:39:41,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:39:41,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-28 10:39:41,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:41,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:41,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:39:41,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:39:41,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 10:39:41,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:41,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-28 10:39:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:41,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:41,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:41,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 10:39:41,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:39:41,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-28 10:39:41,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:41,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:41,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:39:41,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:39:41,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-28 10:39:41,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 186 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 10:39:42,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634596261] [2020-10-28 10:39:42,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:39:42,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 10:39:42,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576967687] [2020-10-28 10:39:42,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:39:42,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:39:42,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:39:42,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:39:42,261 INFO L87 Difference]: Start difference. First operand 48922 states and 61383 transitions. Second operand 8 states. [2020-10-28 10:39:42,405 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 10:39:47,046 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-28 10:39:58,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:39:58,128 INFO L93 Difference]: Finished difference Result 128218 states and 166538 transitions. [2020-10-28 10:39:58,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 10:39:58,136 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 977 [2020-10-28 10:39:58,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:39:58,433 INFO L225 Difference]: With dead ends: 128218 [2020-10-28 10:39:58,433 INFO L226 Difference]: Without dead ends: 75925 [2020-10-28 10:39:58,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-28 10:39:58,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75925 states. [2020-10-28 10:40:00,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75925 to 69938. [2020-10-28 10:40:00,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69938 states. [2020-10-28 10:40:00,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69938 states to 69938 states and 85763 transitions. [2020-10-28 10:40:00,756 INFO L78 Accepts]: Start accepts. Automaton has 69938 states and 85763 transitions. Word has length 977 [2020-10-28 10:40:00,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:40:00,757 INFO L481 AbstractCegarLoop]: Abstraction has 69938 states and 85763 transitions. [2020-10-28 10:40:00,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 10:40:00,757 INFO L276 IsEmpty]: Start isEmpty. Operand 69938 states and 85763 transitions. [2020-10-28 10:40:00,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 991 [2020-10-28 10:40:00,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:40:00,840 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:40:00,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 10:40:00,841 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:40:00,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:40:00,841 INFO L82 PathProgramCache]: Analyzing trace with hash -369147289, now seen corresponding path program 1 times [2020-10-28 10:40:00,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:40:00,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504835819] [2020-10-28 10:40:00,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:40:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:01,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:01,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:02,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:02,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:06,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:06,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1012 [2020-10-28 10:40:06,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:40:06,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5068 [2020-10-28 10:40:06,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:06,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:06,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:40:06,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 10:40:06,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-10-28 10:40:06,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:06,563 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 10:40:06,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:40:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:06,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:06,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:06,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:40:06,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:40:06,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 10:40:06,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:06,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:06,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:40:06,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:40:06,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:40:06,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:06,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:40:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:06,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:06,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:06,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 10:40:06,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:40:06,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 10:40:06,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:06,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:06,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:40:06,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:40:06,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 10:40:06,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:06,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 10:40:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:06,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:06,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:06,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 10:40:06,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:40:06,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-28 10:40:06,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:06,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:06,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:40:06,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:40:06,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 10:40:06,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:06,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-28 10:40:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:06,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:06,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:06,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 10:40:06,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:40:06,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-28 10:40:06,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:06,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:06,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:40:06,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:40:06,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 10:40:06,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 210 proven. 72 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 10:40:07,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504835819] [2020-10-28 10:40:07,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:40:07,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 10:40:07,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374381822] [2020-10-28 10:40:07,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:40:07,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:40:07,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:40:07,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:40:07,733 INFO L87 Difference]: Start difference. First operand 69938 states and 85763 transitions. Second operand 8 states. [2020-10-28 10:40:08,107 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 93