/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-ext2-properties/simple_search_value-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:56:33,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:56:33,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:56:33,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:56:33,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:56:33,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:56:33,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:56:33,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:56:33,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:56:33,213 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:56:33,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:56:33,216 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:56:33,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:56:33,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:56:33,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:56:33,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:56:33,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:56:33,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:56:33,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:56:33,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:56:33,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:56:33,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:56:33,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:56:33,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:56:33,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:56:33,259 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:56:33,266 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:56:33,268 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:56:33,269 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:56:33,270 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:56:33,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:56:33,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:56:33,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:56:33,274 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:56:33,275 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:56:33,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:56:33,276 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:56:33,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:56:33,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:56:33,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:56:33,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:56:33,279 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 19:56:33,305 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:56:33,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:56:33,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:56:33,307 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:56:33,307 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:56:33,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:56:33,307 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:56:33,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:56:33,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:56:33,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:56:33,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:56:33,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:56:33,308 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:56:33,309 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:56:33,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:56:33,309 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:56:33,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:56:33,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:56:33,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:56:33,310 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:56:33,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:56:33,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:56:33,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:56:33,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:56:33,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:56:33,311 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:56:33,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:56:33,311 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:56:33,312 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:56:33,312 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:56:33,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:56:33,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:56:33,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:56:33,704 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:56:33,705 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:56:33,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/simple_search_value-2.i [2020-10-27 19:56:33,794 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f27583bb8/26a0db26d8224ef49692d53971523f52/FLAG15d46189c [2020-10-27 19:56:34,601 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:56:34,602 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/simple_search_value-2.i [2020-10-27 19:56:34,628 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f27583bb8/26a0db26d8224ef49692d53971523f52/FLAG15d46189c [2020-10-27 19:56:34,851 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f27583bb8/26a0db26d8224ef49692d53971523f52 [2020-10-27 19:56:34,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:56:34,868 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:56:34,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:56:34,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:56:34,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:56:34,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:56:34" (1/1) ... [2020-10-27 19:56:34,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fb269c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:34, skipping insertion in model container [2020-10-27 19:56:34,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:56:34" (1/1) ... [2020-10-27 19:56:34,896 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:56:34,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:56:35,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:56:35,306 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:56:35,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:56:35,454 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:56:35,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:35 WrapperNode [2020-10-27 19:56:35,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:56:35,457 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:56:35,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:56:35,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:56:35,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:35" (1/1) ... [2020-10-27 19:56:35,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:35" (1/1) ... [2020-10-27 19:56:35,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:35" (1/1) ... [2020-10-27 19:56:35,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:35" (1/1) ... [2020-10-27 19:56:35,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:35" (1/1) ... [2020-10-27 19:56:35,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:35" (1/1) ... [2020-10-27 19:56:35,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:35" (1/1) ... [2020-10-27 19:56:35,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:56:35,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:56:35,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:56:35,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:56:35,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:56:35,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:56:35,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:56:35,706 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:56:35,706 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 19:56:35,706 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 19:56:35,707 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-27 19:56:35,707 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:56:35,708 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:56:35,708 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:56:35,708 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 19:56:35,709 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 19:56:35,710 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:56:35,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:56:35,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:56:35,710 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 19:56:35,711 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 19:56:35,711 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 19:56:35,711 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 19:56:35,711 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 19:56:35,712 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 19:56:35,712 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 19:56:35,712 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 19:56:35,712 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 19:56:35,712 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 19:56:35,712 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 19:56:35,712 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 19:56:35,713 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 19:56:35,713 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 19:56:35,713 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 19:56:35,713 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 19:56:35,713 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 19:56:35,713 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 19:56:35,713 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 19:56:35,714 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 19:56:35,714 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 19:56:35,714 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 19:56:35,714 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 19:56:35,715 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 19:56:35,715 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 19:56:35,715 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 19:56:35,715 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 19:56:35,715 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 19:56:35,715 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 19:56:35,715 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 19:56:35,715 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 19:56:35,716 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 19:56:35,716 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 19:56:35,716 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 19:56:35,716 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 19:56:35,716 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 19:56:35,716 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 19:56:35,716 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 19:56:35,717 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 19:56:35,717 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 19:56:35,718 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 19:56:35,719 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 19:56:35,719 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 19:56:35,719 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 19:56:35,719 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 19:56:35,719 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 19:56:35,720 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 19:56:35,720 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 19:56:35,720 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 19:56:35,720 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 19:56:35,720 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 19:56:35,720 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 19:56:35,720 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 19:56:35,720 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 19:56:35,721 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 19:56:35,721 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 19:56:35,721 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 19:56:35,721 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 19:56:35,723 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 19:56:35,723 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 19:56:35,724 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 19:56:35,724 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 19:56:35,724 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 19:56:35,724 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 19:56:35,724 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:56:35,724 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 19:56:35,725 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 19:56:35,725 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 19:56:35,726 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 19:56:35,726 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 19:56:35,726 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 19:56:35,726 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 19:56:35,726 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 19:56:35,726 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 19:56:35,727 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 19:56:35,727 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 19:56:35,727 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 19:56:35,727 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 19:56:35,727 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 19:56:35,727 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 19:56:35,727 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 19:56:35,727 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 19:56:35,728 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 19:56:35,728 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 19:56:35,728 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 19:56:35,728 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 19:56:35,728 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 19:56:35,728 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 19:56:35,728 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 19:56:35,729 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 19:56:35,729 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 19:56:35,729 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 19:56:35,729 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 19:56:35,729 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 19:56:35,729 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 19:56:35,729 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 19:56:35,730 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 19:56:35,730 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 19:56:35,730 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 19:56:35,730 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 19:56:35,730 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 19:56:35,730 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 19:56:35,730 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 19:56:35,731 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 19:56:35,731 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-27 19:56:35,731 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:56:35,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 19:56:35,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:56:35,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 19:56:35,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 19:56:35,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:56:35,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:56:35,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:56:35,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:56:35,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:56:36,040 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-27 19:56:36,318 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:56:36,319 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 19:56:36,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:56:36 BoogieIcfgContainer [2020-10-27 19:56:36,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:56:36,329 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:56:36,330 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:56:36,333 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:56:36,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:56:34" (1/3) ... [2020-10-27 19:56:36,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cee09af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:56:36, skipping insertion in model container [2020-10-27 19:56:36,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:35" (2/3) ... [2020-10-27 19:56:36,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cee09af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:56:36, skipping insertion in model container [2020-10-27 19:56:36,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:56:36" (3/3) ... [2020-10-27 19:56:36,340 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_search_value-2.i [2020-10-27 19:56:36,363 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:56:36,371 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:56:36,390 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:56:36,441 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:56:36,442 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:56:36,442 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:56:36,442 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:56:36,442 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:56:36,442 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:56:36,442 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:56:36,442 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:56:36,469 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-27 19:56:36,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 19:56:36,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:36,486 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:36,488 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:36,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:36,498 INFO L82 PathProgramCache]: Analyzing trace with hash -297690078, now seen corresponding path program 1 times [2020-10-27 19:56:36,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:36,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758919477] [2020-10-27 19:56:36,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:36,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:36,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:36,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:37,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:37,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 19:56:37,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:37,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 494 [2020-10-27 19:56:37,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:37,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:37,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 19:56:37,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:37,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:56:37,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:37,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:37,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:37,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:37,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:37,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:37,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:56:37,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:37,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:37,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:37,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:37,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:37,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:37,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758919477] [2020-10-27 19:56:37,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:56:37,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:56:37,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417414372] [2020-10-27 19:56:37,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 19:56:37,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:37,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 19:56:37,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:56:37,365 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-10-27 19:56:37,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:37,473 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2020-10-27 19:56:37,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 19:56:37,475 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-27 19:56:37,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:37,483 INFO L225 Difference]: With dead ends: 52 [2020-10-27 19:56:37,483 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 19:56:37,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:56:37,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 19:56:37,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 19:56:37,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 19:56:37,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-27 19:56:37,529 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2020-10-27 19:56:37,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:37,529 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-27 19:56:37,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 19:56:37,530 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-27 19:56:37,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 19:56:37,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:37,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:37,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:56:37,531 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:37,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:37,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1834434861, now seen corresponding path program 1 times [2020-10-27 19:56:37,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:37,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150234782] [2020-10-27 19:56:37,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:37,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:37,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:37,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:37,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:37,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:38,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:38,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 19:56:38,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:56:38,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-10-27 19:56:38,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:38,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:56:38,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 19:56:38,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:56:38,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:38,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:38,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:38,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:38,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:38,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:38,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:56:38,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:38,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:38,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:38,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:38,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:38,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:38,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150234782] [2020-10-27 19:56:38,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:56:38,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:56:38,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841498652] [2020-10-27 19:56:38,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:56:38,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:38,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:56:38,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:56:38,174 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2020-10-27 19:56:38,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:38,248 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-10-27 19:56:38,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:56:38,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-27 19:56:38,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:38,249 INFO L225 Difference]: With dead ends: 36 [2020-10-27 19:56:38,250 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 19:56:38,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:56:38,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 19:56:38,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 19:56:38,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 19:56:38,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-27 19:56:38,258 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2020-10-27 19:56:38,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:38,259 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-27 19:56:38,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:56:38,259 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-27 19:56:38,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 19:56:38,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:38,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:38,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:56:38,260 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:38,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:38,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1651185809, now seen corresponding path program 1 times [2020-10-27 19:56:38,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:38,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965293789] [2020-10-27 19:56:38,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:38,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:38,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:38,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:38,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:38,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 19:56:38,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:38,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-10-27 19:56:38,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:38,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:56:38,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:56:38,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 19:56:38,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:56:38,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:38,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:38,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:38,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:38,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:38,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 19:56:38,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:38,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:38,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:38,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:38,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:38,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965293789] [2020-10-27 19:56:38,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:56:38,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:56:38,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36420232] [2020-10-27 19:56:38,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:56:38,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:38,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:56:38,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:56:38,764 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-10-27 19:56:38,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:38,855 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2020-10-27 19:56:38,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:56:38,856 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-27 19:56:38,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:38,857 INFO L225 Difference]: With dead ends: 47 [2020-10-27 19:56:38,857 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 19:56:38,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:56:38,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 19:56:38,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-10-27 19:56:38,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 19:56:38,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-27 19:56:38,864 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2020-10-27 19:56:38,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:38,865 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-27 19:56:38,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:56:38,865 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-27 19:56:38,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:56:38,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:38,866 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:38,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:56:38,866 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:38,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:38,867 INFO L82 PathProgramCache]: Analyzing trace with hash -747014688, now seen corresponding path program 1 times [2020-10-27 19:56:38,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:38,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198133416] [2020-10-27 19:56:38,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:38,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:38,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:38,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:39,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:39,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 19:56:39,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:39,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 372 [2020-10-27 19:56:39,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:39,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:56:39,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:56:39,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 19:56:39,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:39,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:39,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:39,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:39,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:39,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:39,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:56:39,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:39,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:39,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:39,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:39,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:39,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198133416] [2020-10-27 19:56:39,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:39,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:56:39,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100781802] [2020-10-27 19:56:39,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:56:39,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:39,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:56:39,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:56:39,336 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-10-27 19:56:39,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:39,441 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2020-10-27 19:56:39,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:56:39,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-27 19:56:39,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:39,442 INFO L225 Difference]: With dead ends: 52 [2020-10-27 19:56:39,442 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 19:56:39,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:56:39,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 19:56:39,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-10-27 19:56:39,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 19:56:39,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-27 19:56:39,450 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2020-10-27 19:56:39,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:39,450 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-27 19:56:39,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:56:39,450 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-27 19:56:39,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 19:56:39,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:39,451 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:39,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:56:39,452 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:39,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:39,452 INFO L82 PathProgramCache]: Analyzing trace with hash 346821105, now seen corresponding path program 2 times [2020-10-27 19:56:39,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:39,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105443947] [2020-10-27 19:56:39,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:39,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:39,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:39,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:40,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:40,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:56:40,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:40,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 603 [2020-10-27 19:56:40,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:40,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:56:40,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:56:40,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 19:56:40,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:40,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:40,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:40,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:40,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:40,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:40,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:56:40,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:40,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:40,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:40,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:40,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:40,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105443947] [2020-10-27 19:56:40,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:40,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 19:56:40,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843780537] [2020-10-27 19:56:40,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:56:40,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:40,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:56:40,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:56:40,159 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 7 states. [2020-10-27 19:56:40,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:40,287 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-10-27 19:56:40,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:56:40,287 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-27 19:56:40,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:40,288 INFO L225 Difference]: With dead ends: 57 [2020-10-27 19:56:40,288 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 19:56:40,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:56:40,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 19:56:40,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-27 19:56:40,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 19:56:40,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-27 19:56:40,296 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 27 [2020-10-27 19:56:40,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:40,296 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-27 19:56:40,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:56:40,296 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-27 19:56:40,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 19:56:40,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:40,298 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:40,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:56:40,298 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:40,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:40,299 INFO L82 PathProgramCache]: Analyzing trace with hash 331176064, now seen corresponding path program 3 times [2020-10-27 19:56:40,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:40,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143608679] [2020-10-27 19:56:40,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:40,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:40,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:40,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:40,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:41,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:41,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 19:56:41,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:41,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 695 [2020-10-27 19:56:41,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:41,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:56:41,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:56:41,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 19:56:41,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:41,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:41,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:41,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:41,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:41,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:41,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:56:41,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:41,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:41,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:41,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:41,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:41,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143608679] [2020-10-27 19:56:41,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:41,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:56:41,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355556663] [2020-10-27 19:56:41,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:56:41,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:41,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:56:41,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:56:41,137 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 8 states. [2020-10-27 19:56:41,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:41,301 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-10-27 19:56:41,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:56:41,302 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-27 19:56:41,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:41,303 INFO L225 Difference]: With dead ends: 62 [2020-10-27 19:56:41,303 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 19:56:41,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:56:41,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 19:56:41,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-27 19:56:41,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 19:56:41,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-27 19:56:41,310 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 32 [2020-10-27 19:56:41,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:41,311 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-27 19:56:41,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:56:41,311 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-27 19:56:41,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 19:56:41,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:41,312 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:41,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:56:41,312 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:41,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:41,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1049416529, now seen corresponding path program 4 times [2020-10-27 19:56:41,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:41,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384245219] [2020-10-27 19:56:41,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:41,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:41,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:41,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:42,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:42,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 19:56:42,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:42,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 819 [2020-10-27 19:56:42,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:42,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:56:42,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:56:42,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 19:56:42,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:42,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:42,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:42,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:42,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:42,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:42,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:56:42,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:42,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:42,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:42,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:42,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:42,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384245219] [2020-10-27 19:56:42,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:42,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:56:42,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333349281] [2020-10-27 19:56:42,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:56:42,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:42,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:56:42,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:56:42,280 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 9 states. [2020-10-27 19:56:42,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:42,438 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2020-10-27 19:56:42,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:56:42,439 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-27 19:56:42,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:42,440 INFO L225 Difference]: With dead ends: 67 [2020-10-27 19:56:42,440 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 19:56:42,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:56:42,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 19:56:42,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-27 19:56:42,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 19:56:42,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-27 19:56:42,447 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 37 [2020-10-27 19:56:42,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:42,448 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-27 19:56:42,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:56:42,448 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-27 19:56:42,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 19:56:42,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:42,449 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:42,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:56:42,449 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:42,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:42,450 INFO L82 PathProgramCache]: Analyzing trace with hash 285111072, now seen corresponding path program 5 times [2020-10-27 19:56:42,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:42,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925582851] [2020-10-27 19:56:42,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:42,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:42,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:42,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:43,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:43,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 19:56:43,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:43,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1109 [2020-10-27 19:56:43,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:43,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:56:43,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:56:43,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 19:56:43,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:56:43,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:43,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:43,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:43,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:43,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:43,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:43,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:56:43,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:43,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:43,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:43,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:43,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:56:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 5 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:43,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925582851] [2020-10-27 19:56:43,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:43,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:56:43,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006029446] [2020-10-27 19:56:43,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:56:43,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:43,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:56:43,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:56:43,781 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 10 states. [2020-10-27 19:56:44,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:44,106 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2020-10-27 19:56:44,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:56:44,108 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-27 19:56:44,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:44,110 INFO L225 Difference]: With dead ends: 72 [2020-10-27 19:56:44,110 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 19:56:44,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:56:44,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 19:56:44,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-27 19:56:44,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 19:56:44,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-27 19:56:44,128 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 42 [2020-10-27 19:56:44,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:44,129 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-27 19:56:44,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:56:44,129 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-27 19:56:44,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 19:56:44,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:44,134 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:44,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:56:44,135 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:44,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:44,136 INFO L82 PathProgramCache]: Analyzing trace with hash -789357391, now seen corresponding path program 6 times [2020-10-27 19:56:44,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:44,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487380864] [2020-10-27 19:56:44,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:44,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:44,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:44,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:45,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:45,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 19:56:45,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:45,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1466 [2020-10-27 19:56:45,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:45,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:56:45,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:56:45,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 19:56:45,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:45,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:45,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:45,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:45,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:45,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:45,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:56:45,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:45,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:45,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:45,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:45,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:45,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487380864] [2020-10-27 19:56:45,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:45,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:56:45,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101793992] [2020-10-27 19:56:45,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:56:45,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:45,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:56:45,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:56:45,807 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 11 states. [2020-10-27 19:56:46,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:46,038 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2020-10-27 19:56:46,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:56:46,039 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-27 19:56:46,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:46,040 INFO L225 Difference]: With dead ends: 77 [2020-10-27 19:56:46,041 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 19:56:46,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:56:46,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 19:56:46,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-10-27 19:56:46,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 19:56:46,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-27 19:56:46,052 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 47 [2020-10-27 19:56:46,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:46,053 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-27 19:56:46,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:56:46,053 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-27 19:56:46,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 19:56:46,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:46,058 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:46,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:56:46,059 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:46,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:46,059 INFO L82 PathProgramCache]: Analyzing trace with hash 2048312768, now seen corresponding path program 7 times [2020-10-27 19:56:46,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:46,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406326209] [2020-10-27 19:56:46,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:46,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:46,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:46,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:47,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:47,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 19:56:47,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:47,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1836 [2020-10-27 19:56:47,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:47,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:56:47,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:56:47,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 19:56:47,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:48,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:48,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:48,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:48,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:48,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:48,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:56:48,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:48,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:48,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:48,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:48,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 7 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:48,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406326209] [2020-10-27 19:56:48,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:48,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:56:48,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326463930] [2020-10-27 19:56:48,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:56:48,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:48,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:56:48,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:56:48,113 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 12 states. [2020-10-27 19:56:48,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:48,323 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2020-10-27 19:56:48,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 19:56:48,324 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-10-27 19:56:48,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:48,325 INFO L225 Difference]: With dead ends: 82 [2020-10-27 19:56:48,325 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 19:56:48,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:56:48,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 19:56:48,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-10-27 19:56:48,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 19:56:48,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-27 19:56:48,343 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 52 [2020-10-27 19:56:48,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:48,343 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-27 19:56:48,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:56:48,343 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-27 19:56:48,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 19:56:48,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:48,346 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:48,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:56:48,346 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:48,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:48,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1430629905, now seen corresponding path program 8 times [2020-10-27 19:56:48,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:48,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46767906] [2020-10-27 19:56:48,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:48,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:48,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:48,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:48,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:50,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:50,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 19:56:50,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:50,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1766 [2020-10-27 19:56:50,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:50,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:56:50,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:56:50,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 19:56:50,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:50,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:50,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:50,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:50,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:50,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:50,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:56:50,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:50,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:50,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:50,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:50,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 8 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:50,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46767906] [2020-10-27 19:56:50,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:50,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:56:50,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130062672] [2020-10-27 19:56:50,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:56:50,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:50,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:56:50,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:56:50,348 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 13 states. [2020-10-27 19:56:50,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:50,657 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2020-10-27 19:56:50,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 19:56:50,658 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-10-27 19:56:50,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:50,659 INFO L225 Difference]: With dead ends: 87 [2020-10-27 19:56:50,659 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 19:56:50,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:56:50,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 19:56:50,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-10-27 19:56:50,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 19:56:50,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2020-10-27 19:56:50,666 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 57 [2020-10-27 19:56:50,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:50,667 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2020-10-27 19:56:50,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:56:50,667 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2020-10-27 19:56:50,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 19:56:50,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:50,668 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:50,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:56:50,668 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:50,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:50,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1251979168, now seen corresponding path program 9 times [2020-10-27 19:56:50,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:50,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014053265] [2020-10-27 19:56:50,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:50,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:50,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:51,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:52,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:52,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 19:56:52,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:52,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1989 [2020-10-27 19:56:52,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:52,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:56:52,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:56:52,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 19:56:52,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:52,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:52,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:52,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:52,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:52,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:52,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:56:52,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:52,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:52,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:52,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:52,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:52,872 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 9 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:52,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014053265] [2020-10-27 19:56:52,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:52,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:56:52,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439494706] [2020-10-27 19:56:52,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:56:52,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:52,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:56:52,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:56:52,876 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 14 states. [2020-10-27 19:56:53,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:53,189 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2020-10-27 19:56:53,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 19:56:53,190 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-27 19:56:53,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:53,191 INFO L225 Difference]: With dead ends: 92 [2020-10-27 19:56:53,191 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 19:56:53,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:56:53,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 19:56:53,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-10-27 19:56:53,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 19:56:53,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-27 19:56:53,198 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 62 [2020-10-27 19:56:53,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:53,198 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-27 19:56:53,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:56:53,198 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-27 19:56:53,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 19:56:53,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:53,199 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:53,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:56:53,199 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:53,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:53,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1298777969, now seen corresponding path program 10 times [2020-10-27 19:56:53,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:53,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559727091] [2020-10-27 19:56:53,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:53,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:53,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:53,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:53,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 19:56:53,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:56:53,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-27 19:56:53,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:53,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:56:53,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 19:56:53,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 19:56:53,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:53,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:53,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:53,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:53,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:53,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:53,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:56:53,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:53,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:53,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:53,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:53,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:53,656 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2020-10-27 19:56:53,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559727091] [2020-10-27 19:56:53,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:56:53,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:56:53,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807023636] [2020-10-27 19:56:53,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:56:53,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:53,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:56:53,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:56:53,660 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 5 states. [2020-10-27 19:56:53,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:53,766 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-10-27 19:56:53,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:56:53,767 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-10-27 19:56:53,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:53,768 INFO L225 Difference]: With dead ends: 78 [2020-10-27 19:56:53,768 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 19:56:53,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:56:53,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 19:56:53,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-27 19:56:53,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 19:56:53,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-10-27 19:56:53,780 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 67 [2020-10-27 19:56:53,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:53,781 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-10-27 19:56:53,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:56:53,781 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-10-27 19:56:53,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 19:56:53,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:53,782 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:53,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 19:56:53,783 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:53,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:53,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1033830600, now seen corresponding path program 1 times [2020-10-27 19:56:53,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:53,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316624117] [2020-10-27 19:56:53,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:53,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:54,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:56,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:58,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:02,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:02,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 19:57:02,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:57:02,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8181 [2020-10-27 19:57:02,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:02,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:57:02,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-27 19:57:02,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 19:57:02,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:02,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:57:02,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:02,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:02,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:02,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:57:02,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:02,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:57:02,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:02,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:57:02,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:57:02,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:57:02,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2020-10-27 19:57:02,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316624117] [2020-10-27 19:57:02,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:57:02,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:57:02,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693335647] [2020-10-27 19:57:02,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:57:02,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:57:02,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:57:02,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:57:02,109 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 6 states. [2020-10-27 19:57:02,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:57:02,215 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2020-10-27 19:57:02,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:57:02,216 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-27 19:57:02,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:57:02,217 INFO L225 Difference]: With dead ends: 86 [2020-10-27 19:57:02,218 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 19:57:02,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:57:02,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 19:57:02,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-27 19:57:02,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 19:57:02,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-10-27 19:57:02,234 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 72 [2020-10-27 19:57:02,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:57:02,234 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-10-27 19:57:02,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:57:02,234 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-10-27 19:57:02,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 19:57:02,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:57:02,235 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:57:02,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 19:57:02,235 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:57:02,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:57:02,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1486129334, now seen corresponding path program 1 times [2020-10-27 19:57:02,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:57:02,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381480654] [2020-10-27 19:57:02,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:57:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:02,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:03,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:04,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:07,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:07,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 19:57:07,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:57:07,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 19:57:07,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:07,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 19:57:07,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:57:07,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 19:57:07,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:09,902 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2020-10-27 19:57:10,233 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 50 [2020-10-27 19:57:10,746 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 41 [2020-10-27 19:57:11,370 WARN L193 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 62 [2020-10-27 19:57:12,126 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 59 [2020-10-27 19:57:13,285 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 187 DAG size of output: 65 [2020-10-27 19:57:13,704 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 38 [2020-10-27 19:57:14,403 WARN L193 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 55 [2020-10-27 19:57:14,782 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 40 [2020-10-27 19:57:15,703 WARN L193 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 73 [2020-10-27 19:57:16,409 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 54 [2020-10-27 19:57:17,450 WARN L193 SmtUtils]: Spent 931.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 74 [2020-10-27 19:57:17,944 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 56 [2020-10-27 19:57:18,871 WARN L193 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 66 [2020-10-27 19:57:19,393 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 57 [2020-10-27 19:57:20,061 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 68 [2020-10-27 19:57:20,697 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2020-10-27 19:57:21,203 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2020-10-27 19:57:21,442 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-10-27 19:57:21,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:57:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:21,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:21,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:21,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:57:21,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:21,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:57:21,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:21,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:57:21,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:57:21,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:57:21,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 6 proven. 250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:57:21,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381480654] [2020-10-27 19:57:21,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:57:21,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 19:57:21,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554965204] [2020-10-27 19:57:21,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 19:57:21,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:57:21,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 19:57:21,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=695, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:57:21,980 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 28 states. [2020-10-27 19:57:22,666 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-10-27 19:57:23,549 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 87 [2020-10-27 19:57:24,215 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-10-27 19:57:24,465 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2020-10-27 19:57:25,158 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 77 [2020-10-27 19:57:25,443 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2020-10-27 19:57:26,107 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 75 [2020-10-27 19:57:26,446 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 47 [2020-10-27 19:57:27,377 WARN L193 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 78 [2020-10-27 19:57:27,859 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2020-10-27 19:57:29,055 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 201 DAG size of output: 83 [2020-10-27 19:57:29,619 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 60 [2020-10-27 19:57:30,916 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 212 DAG size of output: 90 [2020-10-27 19:57:31,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:57:31,480 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2020-10-27 19:57:31,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 19:57:31,481 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 72 [2020-10-27 19:57:31,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:57:31,482 INFO L225 Difference]: With dead ends: 97 [2020-10-27 19:57:31,482 INFO L226 Difference]: Without dead ends: 92 [2020-10-27 19:57:31,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=213, Invalid=1593, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 19:57:31,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-27 19:57:31,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2020-10-27 19:57:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 19:57:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2020-10-27 19:57:31,492 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 72 [2020-10-27 19:57:31,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:57:31,492 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2020-10-27 19:57:31,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 19:57:31,492 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2020-10-27 19:57:31,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 19:57:31,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:57:31,493 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:57:31,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 19:57:31,494 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:57:31,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:57:31,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1713888970, now seen corresponding path program 1 times [2020-10-27 19:57:31,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:57:31,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573115518] [2020-10-27 19:57:31,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:57:31,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:31,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:32,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:35,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:36,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:36,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 19:57:36,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:57:36,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4775 [2020-10-27 19:57:36,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:36,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 19:57:36,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:57:36,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 19:57:36,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:38,277 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 55 [2020-10-27 19:57:38,675 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 64 [2020-10-27 19:57:39,192 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 65 [2020-10-27 19:57:40,127 WARN L193 SmtUtils]: Spent 878.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 90 [2020-10-27 19:57:40,960 WARN L193 SmtUtils]: Spent 773.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 70 [2020-10-27 19:57:42,198 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 151 DAG size of output: 93 [2020-10-27 19:57:42,873 WARN L193 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 64 [2020-10-27 19:57:43,834 WARN L193 SmtUtils]: Spent 882.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 89 [2020-10-27 19:57:44,542 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 57 [2020-10-27 19:57:45,515 WARN L193 SmtUtils]: Spent 885.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 75 [2020-10-27 19:57:46,139 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 63 [2020-10-27 19:57:46,909 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 76 [2020-10-27 19:57:47,565 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 58 [2020-10-27 19:57:48,535 WARN L193 SmtUtils]: Spent 839.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 86 [2020-10-27 19:57:49,006 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 66 [2020-10-27 19:57:49,850 WARN L193 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 84 [2020-10-27 19:57:50,452 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 70 [2020-10-27 19:57:50,987 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 70 [2020-10-27 19:57:51,251 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 47 [2020-10-27 19:57:51,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:57:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:51,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:51,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:51,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:57:51,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:51,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:57:51,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:51,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:57:51,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:57:51,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:57:51,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:57:51,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573115518] [2020-10-27 19:57:51,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:57:51,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 19:57:51,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460301499] [2020-10-27 19:57:51,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 19:57:51,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:57:51,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 19:57:51,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:57:51,894 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand 28 states. [2020-10-27 19:57:52,387 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2020-10-27 19:57:53,037 WARN L193 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 81 [2020-10-27 19:57:53,442 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 73 [2020-10-27 19:57:54,109 WARN L193 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 94 [2020-10-27 19:57:54,676 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 77 [2020-10-27 19:57:55,437 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 102 [2020-10-27 19:57:55,823 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2020-10-27 19:57:56,963 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 179 DAG size of output: 99 [2020-10-27 19:57:57,523 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2020-10-27 19:57:58,187 WARN L193 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 86 [2020-10-27 19:57:58,538 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2020-10-27 19:57:59,007 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 75 [2020-10-27 19:57:59,646 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 103 [2020-10-27 19:58:00,490 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 97 [2020-10-27 19:58:01,067 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 103 [2020-10-27 19:58:01,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:58:01,684 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2020-10-27 19:58:01,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 19:58:01,685 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 72 [2020-10-27 19:58:01,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:58:01,687 INFO L225 Difference]: With dead ends: 111 [2020-10-27 19:58:01,687 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 19:58:01,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=306, Invalid=1586, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 19:58:01,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 19:58:01,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 91. [2020-10-27 19:58:01,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 19:58:01,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2020-10-27 19:58:01,697 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 72 [2020-10-27 19:58:01,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:58:01,697 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2020-10-27 19:58:01,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 19:58:01,698 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2020-10-27 19:58:01,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 19:58:01,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:58:01,698 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:58:01,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 19:58:01,699 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:58:01,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:58:01,699 INFO L82 PathProgramCache]: Analyzing trace with hash -806070964, now seen corresponding path program 1 times [2020-10-27 19:58:01,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:58:01,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854594164] [2020-10-27 19:58:01,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:58:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:58:01,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:03,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:58:03,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 19:58:03,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:58:03,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1677 [2020-10-27 19:58:03,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:58:03,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 19:58:03,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:58:03,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 19:58:03,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:58:03,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:58:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:58:03,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:03,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:58:03,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:58:03,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:58:03,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:58:03,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:58:03,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:58:03,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:58:03,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:58:03,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:58:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 8 proven. 180 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-27 19:58:04,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854594164] [2020-10-27 19:58:04,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:58:04,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 19:58:04,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722424678] [2020-10-27 19:58:04,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 19:58:04,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:58:04,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 19:58:04,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:58:04,011 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 17 states. [2020-10-27 19:58:04,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:58:04,563 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2020-10-27 19:58:04,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:58:04,564 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-10-27 19:58:04,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:58:04,565 INFO L225 Difference]: With dead ends: 106 [2020-10-27 19:58:04,565 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 19:58:04,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:58:04,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 19:58:04,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 82. [2020-10-27 19:58:04,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 19:58:04,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2020-10-27 19:58:04,579 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 72 [2020-10-27 19:58:04,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:58:04,579 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2020-10-27 19:58:04,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 19:58:04,579 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2020-10-27 19:58:04,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 19:58:04,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:58:04,580 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:58:04,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 19:58:04,580 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:58:04,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:58:04,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2020263697, now seen corresponding path program 2 times [2020-10-27 19:58:04,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:58:04,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705813851] [2020-10-27 19:58:04,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:58:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:58:04,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:05,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:07,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:08,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:09,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:58:09,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 19:58:09,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:58:09,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 19:58:09,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:58:09,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 19:58:09,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:58:09,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 19:58:09,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:58:14,079 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-27 19:58:14,595 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2020-10-27 19:58:15,405 WARN L193 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 72 [2020-10-27 19:58:16,930 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 139 DAG size of output: 100 [2020-10-27 19:58:18,053 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 131 DAG size of output: 90 [2020-10-27 19:58:19,801 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 177 DAG size of output: 113 [2020-10-27 19:58:20,647 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 75 [2020-10-27 19:58:22,087 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 189 DAG size of output: 98 [2020-10-27 19:58:23,736 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 184 DAG size of output: 80 [2020-10-27 19:58:25,771 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 222 DAG size of output: 98 [2020-10-27 19:58:26,920 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 188 DAG size of output: 78 [2020-10-27 19:58:28,394 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 218 DAG size of output: 98 [2020-10-27 19:58:29,507 WARN L193 SmtUtils]: Spent 971.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 86 [2020-10-27 19:58:30,876 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 218 DAG size of output: 108 [2020-10-27 19:58:31,773 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 75 [2020-10-27 19:58:33,461 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 197 DAG size of output: 97 [2020-10-27 19:58:34,682 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 178 DAG size of output: 82 [2020-10-27 19:58:35,798 WARN L193 SmtUtils]: Spent 927.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 88 [2020-10-27 19:58:36,369 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 64 [2020-10-27 19:58:37,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:58:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:58:37,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:37,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:58:37,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:58:37,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:58:37,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:58:37,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:58:37,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:58:37,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:58:37,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:58:37,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:58:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 6 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:58:37,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705813851] [2020-10-27 19:58:37,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:58:37,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 19:58:37,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137978305] [2020-10-27 19:58:37,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 19:58:37,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:58:37,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 19:58:37,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2020-10-27 19:58:37,301 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand 29 states. [2020-10-27 19:58:38,140 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 86 [2020-10-27 19:58:39,318 WARN L193 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 109 [2020-10-27 19:58:40,459 WARN L193 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 132 [2020-10-27 19:58:41,427 WARN L193 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 118 [2020-10-27 19:58:42,613 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 146 [2020-10-27 19:58:43,472 WARN L193 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 138 [2020-10-27 19:58:44,781 WARN L193 SmtUtils]: Spent 964.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 128 [2020-10-27 19:58:45,818 WARN L193 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 120 [2020-10-27 19:58:46,741 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 142 [2020-10-27 19:58:48,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:58:48,071 INFO L93 Difference]: Finished difference Result 117 states and 131 transitions. [2020-10-27 19:58:48,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 19:58:48,074 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 77 [2020-10-27 19:58:48,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:58:48,075 INFO L225 Difference]: With dead ends: 117 [2020-10-27 19:58:48,075 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 19:58:48,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=167, Invalid=1555, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 19:58:48,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 19:58:48,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2020-10-27 19:58:48,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 19:58:48,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2020-10-27 19:58:48,093 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 77 [2020-10-27 19:58:48,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:58:48,094 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2020-10-27 19:58:48,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 19:58:48,094 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2020-10-27 19:58:48,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 19:58:48,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:58:48,095 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:58:48,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 19:58:48,095 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:58:48,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:58:48,096 INFO L82 PathProgramCache]: Analyzing trace with hash 925314705, now seen corresponding path program 1 times [2020-10-27 19:58:48,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:58:48,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291627245] [2020-10-27 19:58:48,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:58:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:58:48,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:48,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:50,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:51,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:53,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:58:53,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 19:58:53,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:58:53,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 19:58:53,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:58:53,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:58:53,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 19:58:53,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:58:53,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:58:53,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:58:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:58:53,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:53,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:58:53,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:58:53,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:58:53,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:58:53,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:58:53,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:58:53,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:58:53,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:58:53,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:58:53,227 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2020-10-27 19:58:53,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291627245] [2020-10-27 19:58:53,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:58:53,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:58:53,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570166552] [2020-10-27 19:58:53,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:58:53,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:58:53,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:58:53,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:58:53,248 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 5 states. [2020-10-27 19:58:53,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:58:53,352 INFO L93 Difference]: Finished difference Result 117 states and 131 transitions. [2020-10-27 19:58:53,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:58:53,353 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-10-27 19:58:53,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:58:53,355 INFO L225 Difference]: With dead ends: 117 [2020-10-27 19:58:53,355 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 19:58:53,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:58:53,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 19:58:53,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2020-10-27 19:58:53,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 19:58:53,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2020-10-27 19:58:53,377 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 77 [2020-10-27 19:58:53,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:58:53,377 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2020-10-27 19:58:53,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:58:53,377 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2020-10-27 19:58:53,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 19:58:53,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:58:53,378 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:58:53,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 19:58:53,379 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:58:53,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:58:53,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1594645229, now seen corresponding path program 1 times [2020-10-27 19:58:53,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:58:53,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213846974] [2020-10-27 19:58:53,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:58:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:58:53,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:54,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:56,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:58,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:58:58,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 19:58:58,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:58:58,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4801 [2020-10-27 19:58:58,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:58:58,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 19:58:58,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:58:58,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 19:58:58,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:59:00,752 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 22 [2020-10-27 19:59:01,365 WARN L193 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 54 [2020-10-27 19:59:02,491 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 131 DAG size of output: 72 [2020-10-27 19:59:03,211 WARN L193 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 84 [2020-10-27 19:59:04,260 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 154 DAG size of output: 97 [2020-10-27 19:59:05,547 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 164 DAG size of output: 98 [2020-10-27 19:59:07,976 WARN L193 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 216 DAG size of output: 120 [2020-10-27 19:59:09,605 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 174 DAG size of output: 104 [2020-10-27 19:59:11,255 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 186 DAG size of output: 114 [2020-10-27 19:59:12,880 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 189 DAG size of output: 106 [2020-10-27 19:59:15,839 WARN L193 SmtUtils]: Spent 2.83 s on a formula simplification. DAG size of input: 204 DAG size of output: 114 [2020-10-27 19:59:17,264 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 171 DAG size of output: 109 [2020-10-27 19:59:19,276 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 228 DAG size of output: 119 [2020-10-27 19:59:20,362 WARN L193 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 110 [2020-10-27 19:59:21,886 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 206 DAG size of output: 132 [2020-10-27 19:59:22,822 WARN L193 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 103 [2020-10-27 19:59:24,064 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 183 DAG size of output: 128 [2020-10-27 19:59:24,681 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 106 [2020-10-27 19:59:25,395 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 91 [2020-10-27 19:59:25,822 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 61 [2020-10-27 19:59:26,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:59:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:59:26,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:59:26,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:59:26,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:59:26,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:59:26,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:59:26,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:59:26,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:59:26,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:59:26,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:59:26,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:59:26,756 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:59:26,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213846974] [2020-10-27 19:59:26,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:59:26,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 19:59:26,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777406796] [2020-10-27 19:59:26,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 19:59:26,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:59:26,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 19:59:26,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=748, Unknown=0, NotChecked=0, Total=812 [2020-10-27 19:59:26,759 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand 29 states. [2020-10-27 19:59:27,609 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2020-10-27 19:59:28,636 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 124 [2020-10-27 19:59:30,068 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 171 DAG size of output: 150 [2020-10-27 19:59:30,944 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 108 [2020-10-27 19:59:32,482 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 213 DAG size of output: 165 [2020-10-27 19:59:34,419 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 206 DAG size of output: 144 [2020-10-27 19:59:35,075 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 104 [2020-10-27 19:59:36,992 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 245 DAG size of output: 173 [2020-10-27 19:59:37,781 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 96 [2020-10-27 19:59:39,468 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 252 DAG size of output: 169 [2020-10-27 19:59:40,080 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 107 [2020-10-27 19:59:41,869 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 244 DAG size of output: 189 [2020-10-27 19:59:42,402 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 93 [2020-10-27 19:59:43,787 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 189 DAG size of output: 144 [2020-10-27 19:59:44,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:59:44,607 INFO L93 Difference]: Finished difference Result 120 states and 133 transitions. [2020-10-27 19:59:44,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 19:59:44,608 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 77 [2020-10-27 19:59:44,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:59:44,610 INFO L225 Difference]: With dead ends: 120 [2020-10-27 19:59:44,610 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 19:59:44,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 40.8s TimeCoverageRelationStatistics Valid=157, Invalid=1735, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 19:59:44,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 19:59:44,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 101. [2020-10-27 19:59:44,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 19:59:44,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2020-10-27 19:59:44,624 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 77 [2020-10-27 19:59:44,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:59:44,624 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2020-10-27 19:59:44,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 19:59:44,625 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2020-10-27 19:59:44,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 19:59:44,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:59:44,626 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:59:44,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 19:59:44,626 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:59:44,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:59:44,626 INFO L82 PathProgramCache]: Analyzing trace with hash 750981009, now seen corresponding path program 2 times [2020-10-27 19:59:44,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:59:44,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820102929] [2020-10-27 19:59:44,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:59:44,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:59:44,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:59:44,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:59:45,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:59:46,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:59:49,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:59:50,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:59:50,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 19:59:50,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:59:50,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5953 [2020-10-27 19:59:50,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:59:50,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:59:50,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-27 19:59:50,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 19:59:50,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:59:50,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:59:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:59:50,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:59:50,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:59:50,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:59:50,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:59:50,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:59:50,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:59:50,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:59:50,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:59:50,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:59:50,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:59:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2020-10-27 19:59:50,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820102929] [2020-10-27 19:59:50,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:59:50,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:59:50,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958077578] [2020-10-27 19:59:50,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:59:50,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:59:50,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:59:50,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:59:50,695 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand 5 states. [2020-10-27 19:59:50,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:59:50,802 INFO L93 Difference]: Finished difference Result 120 states and 135 transitions. [2020-10-27 19:59:50,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:59:50,802 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-10-27 19:59:50,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:59:50,804 INFO L225 Difference]: With dead ends: 120 [2020-10-27 19:59:50,804 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 19:59:50,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:59:50,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 19:59:50,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2020-10-27 19:59:50,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 19:59:50,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 121 transitions. [2020-10-27 19:59:50,818 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 121 transitions. Word has length 77 [2020-10-27 19:59:50,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:59:50,818 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 121 transitions. [2020-10-27 19:59:50,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:59:50,818 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 121 transitions. [2020-10-27 19:59:50,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 19:59:50,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:59:50,819 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:59:50,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 19:59:50,819 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:59:50,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:59:50,820 INFO L82 PathProgramCache]: Analyzing trace with hash -343967983, now seen corresponding path program 2 times [2020-10-27 19:59:50,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:59:50,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770085314] [2020-10-27 19:59:50,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:59:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:59:50,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:59:51,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:59:52,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:59:54,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:59:55,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:59:55,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 19:59:55,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:59:55,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 19:59:55,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:59:55,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 19:59:55,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:59:55,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 19:59:55,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0