/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-properties/simple-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:00:30,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:00:30,212 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:00:30,265 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:00:30,266 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:00:30,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:00:30,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:00:30,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:00:30,285 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:00:30,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:00:30,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:00:30,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:00:30,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:00:30,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:00:30,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:00:30,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:00:30,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:00:30,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:00:30,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:00:30,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:00:30,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:00:30,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:00:30,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:00:30,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:00:30,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:00:30,338 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:00:30,339 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:00:30,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:00:30,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:00:30,343 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:00:30,343 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:00:30,344 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:00:30,346 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:00:30,347 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:00:30,348 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:00:30,348 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:00:30,349 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:00:30,349 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:00:30,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:00:30,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:00:30,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:00:30,352 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 20:00:30,405 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:00:30,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:00:30,410 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:00:30,410 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:00:30,410 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:00:30,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:00:30,411 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:00:30,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:00:30,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:00:30,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:00:30,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:00:30,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:00:30,413 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:00:30,413 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:00:30,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:00:30,413 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:00:30,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:00:30,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:00:30,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:00:30,414 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:00:30,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:00:30,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:00:30,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:00:30,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:00:30,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:00:30,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:00:30,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:00:30,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:00:30,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:00:30,416 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:00:30,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:00:30,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:00:30,909 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:00:30,911 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:00:30,911 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:00:30,912 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/simple-2.i [2020-10-27 20:00:31,005 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a071874b/6efa773c4ea049ea93baf6739089d5c7/FLAG82628182e [2020-10-27 20:00:31,776 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:00:31,777 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/simple-2.i [2020-10-27 20:00:31,801 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a071874b/6efa773c4ea049ea93baf6739089d5c7/FLAG82628182e [2020-10-27 20:00:32,068 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a071874b/6efa773c4ea049ea93baf6739089d5c7 [2020-10-27 20:00:32,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:00:32,082 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:00:32,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:00:32,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:00:32,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:00:32,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:00:32" (1/1) ... [2020-10-27 20:00:32,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49856691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:32, skipping insertion in model container [2020-10-27 20:00:32,098 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:00:32" (1/1) ... [2020-10-27 20:00:32,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:00:32,175 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:00:32,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:00:32,492 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:00:32,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:00:32,647 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:00:32,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:32 WrapperNode [2020-10-27 20:00:32,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:00:32,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:00:32,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:00:32,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:00:32,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:32" (1/1) ... [2020-10-27 20:00:32,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:32" (1/1) ... [2020-10-27 20:00:32,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:32" (1/1) ... [2020-10-27 20:00:32,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:32" (1/1) ... [2020-10-27 20:00:32,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:32" (1/1) ... [2020-10-27 20:00:32,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:32" (1/1) ... [2020-10-27 20:00:32,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:32" (1/1) ... [2020-10-27 20:00:32,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:00:32,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:00:32,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:00:32,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:00:32,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:32" (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 20:00:32,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:00:32,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:00:32,963 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:00:32,964 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 20:00:32,964 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 20:00:32,964 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-27 20:00:32,964 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-27 20:00:32,964 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-27 20:00:32,965 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-27 20:00:32,965 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:00:32,966 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:00:32,967 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:00:32,967 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 20:00:32,967 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 20:00:32,967 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:00:32,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:00:32,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 20:00:32,969 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 20:00:32,969 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 20:00:32,969 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 20:00:32,969 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 20:00:32,969 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 20:00:32,970 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 20:00:32,970 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 20:00:32,970 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 20:00:32,970 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 20:00:32,970 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 20:00:32,970 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 20:00:32,971 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 20:00:32,971 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 20:00:32,971 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 20:00:32,971 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 20:00:32,971 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 20:00:32,971 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 20:00:32,972 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 20:00:32,972 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-27 20:00:32,972 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-27 20:00:32,972 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-27 20:00:32,972 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 20:00:32,972 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 20:00:32,973 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 20:00:32,973 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 20:00:32,973 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 20:00:32,973 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 20:00:32,973 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 20:00:32,974 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 20:00:32,974 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 20:00:32,974 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 20:00:32,974 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 20:00:32,974 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 20:00:32,974 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 20:00:32,975 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 20:00:32,975 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 20:00:32,976 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 20:00:32,976 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 20:00:32,977 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 20:00:32,977 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 20:00:32,978 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 20:00:32,978 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 20:00:32,978 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 20:00:32,978 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 20:00:32,978 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 20:00:32,979 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 20:00:32,979 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 20:00:32,979 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 20:00:32,979 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 20:00:32,980 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 20:00:32,980 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 20:00:32,980 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 20:00:32,980 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 20:00:32,981 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 20:00:32,981 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 20:00:32,983 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 20:00:32,983 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 20:00:32,984 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 20:00:32,984 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 20:00:32,984 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 20:00:32,984 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 20:00:32,985 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 20:00:32,985 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 20:00:32,985 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 20:00:32,985 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 20:00:32,986 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 20:00:32,986 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 20:00:32,987 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 20:00:32,987 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 20:00:32,987 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 20:00:32,987 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 20:00:32,987 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 20:00:32,987 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 20:00:32,988 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 20:00:32,988 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 20:00:32,988 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 20:00:32,988 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 20:00:32,988 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 20:00:32,989 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 20:00:32,989 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 20:00:32,989 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 20:00:32,989 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 20:00:32,989 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 20:00:32,989 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 20:00:32,990 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 20:00:32,990 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 20:00:32,990 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 20:00:32,990 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 20:00:32,990 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 20:00:32,991 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 20:00:32,991 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 20:00:32,991 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 20:00:32,991 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 20:00:32,991 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 20:00:32,992 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 20:00:32,992 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 20:00:32,992 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 20:00:32,992 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 20:00:32,992 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 20:00:32,994 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 20:00:32,995 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 20:00:32,995 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 20:00:32,995 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 20:00:32,995 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 20:00:32,995 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 20:00:32,995 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 20:00:32,996 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-27 20:00:32,996 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:00:32,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 20:00:32,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:00:32,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 20:00:32,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 20:00:32,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:00:32,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:00:32,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:00:33,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:00:33,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:00:33,615 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-27 20:00:33,735 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:00:33,735 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 20:00:33,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:00:33 BoogieIcfgContainer [2020-10-27 20:00:33,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:00:33,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:00:33,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:00:33,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:00:33,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:00:32" (1/3) ... [2020-10-27 20:00:33,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140999c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:00:33, skipping insertion in model container [2020-10-27 20:00:33,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:32" (2/3) ... [2020-10-27 20:00:33,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140999c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:00:33, skipping insertion in model container [2020-10-27 20:00:33,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:00:33" (3/3) ... [2020-10-27 20:00:33,751 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2020-10-27 20:00:33,764 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:00:33,770 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:00:33,785 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:00:33,830 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:00:33,830 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:00:33,830 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:00:33,831 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:00:33,831 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:00:33,831 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:00:33,831 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:00:33,831 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:00:33,856 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-27 20:00:33,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 20:00:33,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:33,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:33,864 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:33,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:33,873 INFO L82 PathProgramCache]: Analyzing trace with hash 8074775, now seen corresponding path program 1 times [2020-10-27 20:00:33,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:33,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593150401] [2020-10-27 20:00:33,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:34,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:34,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:34,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:34,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:00:34,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:00:34,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 465 [2020-10-27 20:00:34,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:34,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:34,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:00:34,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:34,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:00:34,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:34,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:34,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:34,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:34,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:34,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:00:34,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:34,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:34,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:34,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:34,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:34,597 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 20:00:34,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593150401] [2020-10-27 20:00:34,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:00:34,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:00:34,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051548515] [2020-10-27 20:00:34,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:00:34,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:34,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:00:34,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:00:34,625 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-27 20:00:34,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:34,727 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2020-10-27 20:00:34,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:00:34,729 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-27 20:00:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:34,738 INFO L225 Difference]: With dead ends: 45 [2020-10-27 20:00:34,738 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 20:00:34,741 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 20:00:34,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 20:00:34,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-27 20:00:34,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 20:00:34,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-27 20:00:34,782 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-10-27 20:00:34,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:34,783 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-27 20:00:34,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:00:34,783 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-27 20:00:34,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:00:34,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:34,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:34,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:00:34,785 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:34,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:34,786 INFO L82 PathProgramCache]: Analyzing trace with hash 76749922, now seen corresponding path program 1 times [2020-10-27 20:00:34,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:34,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406849280] [2020-10-27 20:00:34,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:34,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:34,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:34,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:00:34,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:34,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-27 20:00:34,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:34,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:00:34,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:00:34,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:00:34,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:35,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:35,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:35,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:35,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:35,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:35,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:00:35,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:35,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:35,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:35,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:35,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:35,096 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 20:00:35,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406849280] [2020-10-27 20:00:35,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:00:35,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 20:00:35,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802157737] [2020-10-27 20:00:35,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:00:35,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:35,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:00:35,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:00:35,101 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-27 20:00:35,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:35,235 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-10-27 20:00:35,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:00:35,236 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-27 20:00:35,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:35,238 INFO L225 Difference]: With dead ends: 36 [2020-10-27 20:00:35,239 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 20:00:35,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:00:35,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 20:00:35,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2020-10-27 20:00:35,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 20:00:35,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-27 20:00:35,249 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 16 [2020-10-27 20:00:35,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:35,250 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-27 20:00:35,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:00:35,250 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-27 20:00:35,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:00:35,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:35,251 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:35,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:00:35,252 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:35,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:35,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1244663435, now seen corresponding path program 1 times [2020-10-27 20:00:35,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:35,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163892138] [2020-10-27 20:00:35,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:35,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:35,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:35,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:00:35,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:35,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-27 20:00:35,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:35,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:00:35,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:00:35,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:00:35,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:35,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:35,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:35,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:35,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:35,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:35,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:00:35,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:35,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:35,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:35,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:35,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:00:35,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163892138] [2020-10-27 20:00:35,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:00:35,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:00:35,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796783502] [2020-10-27 20:00:35,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:00:35,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:35,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:00:35,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:00:35,547 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-10-27 20:00:35,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:35,671 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-27 20:00:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:00:35,671 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-27 20:00:35,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:35,673 INFO L225 Difference]: With dead ends: 40 [2020-10-27 20:00:35,673 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 20:00:35,674 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 20:00:35,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 20:00:35,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2020-10-27 20:00:35,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 20:00:35,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-27 20:00:35,679 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-10-27 20:00:35,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:35,680 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-27 20:00:35,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:00:35,680 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-27 20:00:35,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 20:00:35,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:35,681 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:35,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:00:35,681 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:35,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:35,682 INFO L82 PathProgramCache]: Analyzing trace with hash 927183817, now seen corresponding path program 1 times [2020-10-27 20:00:35,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:35,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491550791] [2020-10-27 20:00:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:35,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:35,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:35,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:35,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:00:35,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:35,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-27 20:00:35,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:35,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:00:35,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:00:35,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:00:35,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:36,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:36,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:36,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:36,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:36,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:36,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:00:36,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:36,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:36,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:36,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:36,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:00:36,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491550791] [2020-10-27 20:00:36,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:00:36,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:00:36,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338043716] [2020-10-27 20:00:36,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:00:36,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:36,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:00:36,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:00:36,230 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2020-10-27 20:00:36,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:36,610 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-27 20:00:36,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:00:36,611 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-27 20:00:36,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:36,612 INFO L225 Difference]: With dead ends: 40 [2020-10-27 20:00:36,612 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 20:00:36,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:00:36,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 20:00:36,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2020-10-27 20:00:36,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 20:00:36,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-27 20:00:36,620 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 20 [2020-10-27 20:00:36,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:36,621 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-27 20:00:36,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:00:36,621 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-27 20:00:36,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:00:36,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:36,622 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:36,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:00:36,622 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:36,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:36,623 INFO L82 PathProgramCache]: Analyzing trace with hash 508750276, now seen corresponding path program 1 times [2020-10-27 20:00:36,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:36,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994935836] [2020-10-27 20:00:36,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:36,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:36,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:37,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:37,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:00:37,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:37,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 370 [2020-10-27 20:00:37,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:37,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:00:37,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:00:37,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:00:37,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:37,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:37,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:37,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:37,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:37,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:37,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:00:37,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:37,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:37,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:37,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:37,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:00:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:00:37,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994935836] [2020-10-27 20:00:37,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:00:37,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:00:37,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637087943] [2020-10-27 20:00:37,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:00:37,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:37,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:00:37,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:00:37,316 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 10 states. [2020-10-27 20:00:37,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:37,672 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-10-27 20:00:37,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:00:37,673 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-27 20:00:37,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:37,677 INFO L225 Difference]: With dead ends: 43 [2020-10-27 20:00:37,677 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 20:00:37,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:00:37,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 20:00:37,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-10-27 20:00:37,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 20:00:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-27 20:00:37,687 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2020-10-27 20:00:37,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:37,688 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-27 20:00:37,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:00:37,688 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-27 20:00:37,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:00:37,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:37,689 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:37,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:00:37,689 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:37,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:37,690 INFO L82 PathProgramCache]: Analyzing trace with hash -411287632, now seen corresponding path program 2 times [2020-10-27 20:00:37,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:37,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639354070] [2020-10-27 20:00:37,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:37,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:37,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:37,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:37,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:00:37,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:37,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-27 20:00:37,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:37,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:00:37,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:00:37,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:00:37,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:38,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:38,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:38,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:38,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:38,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:38,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:00:38,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:38,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:38,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:38,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:38,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:00:38,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639354070] [2020-10-27 20:00:38,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:00:38,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:00:38,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036522482] [2020-10-27 20:00:38,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:00:38,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:38,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:00:38,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:00:38,106 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-10-27 20:00:38,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:38,571 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-10-27 20:00:38,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:00:38,572 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-10-27 20:00:38,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:38,575 INFO L225 Difference]: With dead ends: 50 [2020-10-27 20:00:38,575 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 20:00:38,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:00:38,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 20:00:38,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2020-10-27 20:00:38,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 20:00:38,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-27 20:00:38,592 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 24 [2020-10-27 20:00:38,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:38,592 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-27 20:00:38,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:00:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-27 20:00:38,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:00:38,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:38,593 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:38,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:00:38,594 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:38,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:38,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1049776663, now seen corresponding path program 2 times [2020-10-27 20:00:38,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:38,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856199553] [2020-10-27 20:00:38,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:38,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:38,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:38,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:00:38,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:38,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-27 20:00:38,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:38,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:00:38,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:00:38,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:00:38,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:39,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:39,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:39,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:39,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:39,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:39,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:00:39,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:39,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:39,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:39,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:39,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:00:39,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856199553] [2020-10-27 20:00:39,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:00:39,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:00:39,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287993425] [2020-10-27 20:00:39,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:00:39,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:39,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:00:39,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:00:39,114 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 10 states. [2020-10-27 20:00:39,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:39,411 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-10-27 20:00:39,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:00:39,411 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-27 20:00:39,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:39,412 INFO L225 Difference]: With dead ends: 52 [2020-10-27 20:00:39,412 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 20:00:39,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:00:39,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 20:00:39,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-10-27 20:00:39,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 20:00:39,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-27 20:00:39,423 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2020-10-27 20:00:39,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:39,423 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-27 20:00:39,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:00:39,423 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-27 20:00:39,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:00:39,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:39,424 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 20:00:39,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:00:39,425 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:39,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:39,425 INFO L82 PathProgramCache]: Analyzing trace with hash 582189181, now seen corresponding path program 3 times [2020-10-27 20:00:39,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:39,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624275126] [2020-10-27 20:00:39,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:39,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:39,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:39,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:00:39,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:39,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-27 20:00:39,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:39,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:00:39,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:00:39,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:00:39,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:40,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:40,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:40,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:40,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:40,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:40,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:00:40,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:40,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:40,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:40,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:40,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:00:40,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624275126] [2020-10-27 20:00:40,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:00:40,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:00:40,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114405309] [2020-10-27 20:00:40,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:00:40,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:40,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:00:40,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:00:40,155 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 12 states. [2020-10-27 20:00:40,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:40,593 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-10-27 20:00:40,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:00:40,594 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-27 20:00:40,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:40,595 INFO L225 Difference]: With dead ends: 47 [2020-10-27 20:00:40,595 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 20:00:40,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:00:40,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 20:00:40,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2020-10-27 20:00:40,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 20:00:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-27 20:00:40,603 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 27 [2020-10-27 20:00:40,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:40,603 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-27 20:00:40,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:00:40,604 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-27 20:00:40,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 20:00:40,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:40,605 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:40,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:00:40,605 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:40,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:40,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1865318423, now seen corresponding path program 3 times [2020-10-27 20:00:40,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:40,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527821423] [2020-10-27 20:00:40,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:40,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:40,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:40,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:40,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:00:40,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:40,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 284 [2020-10-27 20:00:40,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:40,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:00:40,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:00:40,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:00:40,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:41,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:41,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:41,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:41,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:41,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:41,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:00:41,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:41,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:41,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:41,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:41,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:00:41,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527821423] [2020-10-27 20:00:41,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:00:41,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:00:41,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640636091] [2020-10-27 20:00:41,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:00:41,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:41,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:00:41,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:00:41,097 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 12 states. [2020-10-27 20:00:41,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:41,278 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-10-27 20:00:41,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:00:41,278 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-27 20:00:41,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:41,279 INFO L225 Difference]: With dead ends: 43 [2020-10-27 20:00:41,279 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 20:00:41,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:00:41,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 20:00:41,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-10-27 20:00:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 20:00:41,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-27 20:00:41,290 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 28 [2020-10-27 20:00:41,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:41,290 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-27 20:00:41,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:00:41,290 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-27 20:00:41,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:00:41,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:41,293 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:41,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:00:41,294 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:41,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:41,294 INFO L82 PathProgramCache]: Analyzing trace with hash 630288528, now seen corresponding path program 4 times [2020-10-27 20:00:41,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:41,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249197151] [2020-10-27 20:00:41,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:41,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:41,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:41,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:00:41,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:41,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-27 20:00:41,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:41,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:00:41,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:00:41,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 20:00:41,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:42,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:42,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:42,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:42,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:42,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:42,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:00:42,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:42,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:42,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:42,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:42,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:00:42,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249197151] [2020-10-27 20:00:42,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:00:42,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:00:42,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240344054] [2020-10-27 20:00:42,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:00:42,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:42,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:00:42,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:00:42,233 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 13 states. [2020-10-27 20:00:42,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:42,924 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-27 20:00:42,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:00:42,924 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-27 20:00:42,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:42,926 INFO L225 Difference]: With dead ends: 49 [2020-10-27 20:00:42,926 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 20:00:42,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:00:42,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 20:00:42,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2020-10-27 20:00:42,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 20:00:42,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-27 20:00:42,937 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 30 [2020-10-27 20:00:42,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:42,938 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-27 20:00:42,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:00:42,942 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-27 20:00:42,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:00:42,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:42,943 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:42,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:00:42,943 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:42,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:42,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1124602550, now seen corresponding path program 5 times [2020-10-27 20:00:42,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:42,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097988141] [2020-10-27 20:00:42,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:42,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:43,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:43,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:00:43,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:43,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 411 [2020-10-27 20:00:43,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:43,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:00:43,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:00:43,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:00:43,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:43,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:43,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:43,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:43,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:43,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:43,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:00:43,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:43,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:43,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:43,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:43,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:43,953 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:00:43,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097988141] [2020-10-27 20:00:43,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:00:43,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:00:43,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938234014] [2020-10-27 20:00:43,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:00:43,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:43,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:00:43,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:00:43,955 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 14 states. [2020-10-27 20:00:44,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:44,926 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2020-10-27 20:00:44,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:00:44,927 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-27 20:00:44,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:44,928 INFO L225 Difference]: With dead ends: 59 [2020-10-27 20:00:44,928 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 20:00:44,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:00:44,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 20:00:44,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-27 20:00:44,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 20:00:44,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-27 20:00:44,944 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 31 [2020-10-27 20:00:44,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:44,945 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-27 20:00:44,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:00:44,945 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-27 20:00:44,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 20:00:44,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:44,946 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:44,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:00:44,946 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:44,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:44,947 INFO L82 PathProgramCache]: Analyzing trace with hash -961141859, now seen corresponding path program 6 times [2020-10-27 20:00:44,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:44,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317728938] [2020-10-27 20:00:44,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:44,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:45,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:45,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:00:45,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:45,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-27 20:00:45,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:45,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:00:45,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:00:45,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:00:45,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:45,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:45,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:45,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:45,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:45,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:45,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:00:45,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:45,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:45,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:45,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:45,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:45,624 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:00:45,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317728938] [2020-10-27 20:00:45,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:00:45,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:00:45,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689732121] [2020-10-27 20:00:45,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:00:45,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:45,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:00:45,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:00:45,627 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 13 states. [2020-10-27 20:00:46,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:46,140 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2020-10-27 20:00:46,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:00:46,140 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 20:00:46,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:46,141 INFO L225 Difference]: With dead ends: 61 [2020-10-27 20:00:46,142 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 20:00:46,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:00:46,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 20:00:46,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-10-27 20:00:46,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 20:00:46,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-27 20:00:46,150 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2020-10-27 20:00:46,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:46,150 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-27 20:00:46,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:00:46,150 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-27 20:00:46,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 20:00:46,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:46,151 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:46,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:00:46,151 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:46,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:46,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1999996855, now seen corresponding path program 7 times [2020-10-27 20:00:46,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:46,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441049053] [2020-10-27 20:00:46,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:46,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:46,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:46,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 20:00:46,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:46,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 517 [2020-10-27 20:00:46,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:46,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:00:46,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:00:46,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:00:46,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:00:47,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:47,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:47,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:47,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:47,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:47,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:00:47,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:47,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:47,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:47,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:47,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:00:47,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441049053] [2020-10-27 20:00:47,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:00:47,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:00:47,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511672237] [2020-10-27 20:00:47,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:00:47,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:47,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:00:47,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:00:47,497 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 15 states. [2020-10-27 20:00:48,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:48,284 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-27 20:00:48,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:00:48,285 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-27 20:00:48,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:48,286 INFO L225 Difference]: With dead ends: 53 [2020-10-27 20:00:48,286 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 20:00:48,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:00:48,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 20:00:48,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-10-27 20:00:48,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 20:00:48,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-27 20:00:48,296 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 34 [2020-10-27 20:00:48,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:48,296 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-27 20:00:48,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:00:48,296 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-27 20:00:48,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 20:00:48,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:48,297 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:48,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:00:48,297 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:48,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:48,298 INFO L82 PathProgramCache]: Analyzing trace with hash 635887727, now seen corresponding path program 8 times [2020-10-27 20:00:48,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:48,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779128277] [2020-10-27 20:00:48,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:48,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:48,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:48,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:00:48,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:48,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 517 [2020-10-27 20:00:48,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:48,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:00:48,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:00:48,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 20:00:48,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:49,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:49,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:49,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:49,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:49,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:49,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:00:49,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:49,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:49,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:49,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:49,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:49,393 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:00:49,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779128277] [2020-10-27 20:00:49,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:00:49,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:00:49,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486117450] [2020-10-27 20:00:49,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:00:49,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:49,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:00:49,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:00:49,397 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 16 states. [2020-10-27 20:00:50,110 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-27 20:00:50,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:50,434 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-27 20:00:50,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:00:50,434 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-27 20:00:50,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:50,435 INFO L225 Difference]: With dead ends: 53 [2020-10-27 20:00:50,435 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 20:00:50,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:00:50,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 20:00:50,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-10-27 20:00:50,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 20:00:50,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-27 20:00:50,444 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 35 [2020-10-27 20:00:50,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:50,444 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-27 20:00:50,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:00:50,444 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-27 20:00:50,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 20:00:50,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:50,445 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:50,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:00:50,445 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:50,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:50,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1830315798, now seen corresponding path program 9 times [2020-10-27 20:00:50,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:50,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507971031] [2020-10-27 20:00:50,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:50,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:50,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:50,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:00:50,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:50,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-27 20:00:50,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:50,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:00:50,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:00:50,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:00:50,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:51,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:51,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:51,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:51,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:51,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:51,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:00:51,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:51,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:51,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:51,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:51,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:00:51,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507971031] [2020-10-27 20:00:51,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:00:51,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:00:51,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988660507] [2020-10-27 20:00:51,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:00:51,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:51,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:00:51,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:00:51,451 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 16 states. [2020-10-27 20:00:51,976 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-27 20:00:52,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:52,511 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-27 20:00:52,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:00:52,512 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-27 20:00:52,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:52,512 INFO L225 Difference]: With dead ends: 58 [2020-10-27 20:00:52,512 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 20:00:52,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:00:52,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 20:00:52,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-27 20:00:52,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 20:00:52,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-27 20:00:52,521 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 37 [2020-10-27 20:00:52,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:52,521 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-27 20:00:52,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:00:52,522 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-27 20:00:52,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 20:00:52,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:52,522 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:52,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:00:52,523 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:52,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:52,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1659128994, now seen corresponding path program 10 times [2020-10-27 20:00:52,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:52,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042498157] [2020-10-27 20:00:52,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:52,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:53,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:53,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 20:00:53,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:53,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 555 [2020-10-27 20:00:53,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:53,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:00:53,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:00:53,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:00:53,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:53,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:53,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:53,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:53,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:53,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:53,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:00:53,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:53,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:53,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:53,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:53,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:00:53,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042498157] [2020-10-27 20:00:53,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:00:53,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:00:53,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881943377] [2020-10-27 20:00:53,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:00:53,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:53,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:00:53,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:00:53,781 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 17 states. [2020-10-27 20:00:54,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:54,503 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-10-27 20:00:54,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:00:54,505 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-27 20:00:54,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:54,506 INFO L225 Difference]: With dead ends: 59 [2020-10-27 20:00:54,506 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 20:00:54,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:00:54,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 20:00:54,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-27 20:00:54,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 20:00:54,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-27 20:00:54,519 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 38 [2020-10-27 20:00:54,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:54,520 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-27 20:00:54,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:00:54,520 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-27 20:00:54,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 20:00:54,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:54,521 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:54,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:00:54,521 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:54,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:54,522 INFO L82 PathProgramCache]: Analyzing trace with hash 2038454103, now seen corresponding path program 11 times [2020-10-27 20:00:54,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:54,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579159348] [2020-10-27 20:00:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:54,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:54,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:55,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:55,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 20:00:55,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:55,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 475 [2020-10-27 20:00:55,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:55,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:00:55,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:00:55,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 20:00:55,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:55,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:55,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:55,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:55,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:55,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:55,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:00:55,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:55,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:55,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:55,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:55,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:55,871 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:00:55,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579159348] [2020-10-27 20:00:55,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:00:55,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:00:55,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831730292] [2020-10-27 20:00:55,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:00:55,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:55,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:00:55,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:00:55,874 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2020-10-27 20:00:56,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:56,596 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-27 20:00:56,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:00:56,597 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-27 20:00:56,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:56,598 INFO L225 Difference]: With dead ends: 65 [2020-10-27 20:00:56,598 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 20:00:56,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:00:56,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 20:00:56,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-27 20:00:56,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 20:00:56,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-27 20:00:56,605 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2020-10-27 20:00:56,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:56,605 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-27 20:00:56,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:00:56,605 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-27 20:00:56,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 20:00:56,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:56,606 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:56,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:00:56,607 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:56,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:56,607 INFO L82 PathProgramCache]: Analyzing trace with hash -917879281, now seen corresponding path program 12 times [2020-10-27 20:00:56,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:56,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456978708] [2020-10-27 20:00:56,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:56,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:57,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:57,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 20:00:57,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:57,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 634 [2020-10-27 20:00:57,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:57,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:00:57,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:00:57,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 20:00:57,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:57,729 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-27 20:00:58,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:58,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:58,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:58,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:58,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:58,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:00:58,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:58,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:58,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:58,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:58,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:00:58,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456978708] [2020-10-27 20:00:58,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:00:58,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:00:58,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766342987] [2020-10-27 20:00:58,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:00:58,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:58,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:00:58,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:00:58,261 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 18 states. [2020-10-27 20:00:59,042 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-10-27 20:00:59,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:59,538 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-27 20:00:59,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:00:59,539 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-10-27 20:00:59,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:59,540 INFO L225 Difference]: With dead ends: 65 [2020-10-27 20:00:59,540 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 20:00:59,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:00:59,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 20:00:59,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-27 20:00:59,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 20:00:59,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-27 20:00:59,548 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 41 [2020-10-27 20:00:59,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:59,548 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-27 20:00:59,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:00:59,549 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-27 20:00:59,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 20:00:59,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:59,549 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:59,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:00:59,550 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:59,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:59,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1225451966, now seen corresponding path program 13 times [2020-10-27 20:00:59,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:59,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12784509] [2020-10-27 20:00:59,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:59,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:00,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:00,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:01:00,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:00,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 743 [2020-10-27 20:01:00,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:00,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:01:00,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:01:00,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 20:01:00,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:01,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:01,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:01,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:01,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:01,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:01,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:01:01,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:01,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:01,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:01,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:01,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:01:01,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12784509] [2020-10-27 20:01:01,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:01,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:01:01,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531515625] [2020-10-27 20:01:01,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:01:01,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:01,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:01:01,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:01:01,188 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 19 states. [2020-10-27 20:01:01,816 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-10-27 20:01:02,158 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2020-10-27 20:01:02,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:02,946 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-27 20:01:02,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:01:02,946 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-27 20:01:02,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:02,947 INFO L225 Difference]: With dead ends: 68 [2020-10-27 20:01:02,947 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 20:01:02,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:01:02,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 20:01:02,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 53. [2020-10-27 20:01:02,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 20:01:02,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-27 20:01:02,957 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 44 [2020-10-27 20:01:02,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:02,957 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-27 20:01:02,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:01:02,957 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-27 20:01:02,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 20:01:02,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:02,958 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:02,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:01:02,958 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:02,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:02,959 INFO L82 PathProgramCache]: Analyzing trace with hash -351141752, now seen corresponding path program 14 times [2020-10-27 20:01:02,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:02,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260478121] [2020-10-27 20:01:02,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:03,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:03,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:03,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 20:01:03,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:03,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 855 [2020-10-27 20:01:03,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:03,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:01:03,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:01:03,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 20:01:03,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:04,306 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-27 20:01:04,500 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-27 20:01:05,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:05,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:05,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:05,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:05,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:05,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:01:05,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:05,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:05,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:05,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:05,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:01:05,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260478121] [2020-10-27 20:01:05,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:05,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:01:05,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520490609] [2020-10-27 20:01:05,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:01:05,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:05,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:01:05,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:01:05,071 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 20 states. [2020-10-27 20:01:05,702 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-27 20:01:05,918 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2020-10-27 20:01:06,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:06,543 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2020-10-27 20:01:06,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:01:06,543 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2020-10-27 20:01:06,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:06,544 INFO L225 Difference]: With dead ends: 82 [2020-10-27 20:01:06,544 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 20:01:06,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:01:06,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 20:01:06,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-27 20:01:06,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 20:01:06,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-27 20:01:06,553 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 45 [2020-10-27 20:01:06,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:06,553 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-27 20:01:06,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:01:06,554 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-27 20:01:06,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 20:01:06,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:06,554 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:06,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:01:06,555 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:06,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:06,555 INFO L82 PathProgramCache]: Analyzing trace with hash -72158289, now seen corresponding path program 15 times [2020-10-27 20:01:06,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:06,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994424120] [2020-10-27 20:01:06,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:06,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:07,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:07,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 20:01:07,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:07,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 693 [2020-10-27 20:01:07,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:07,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:01:07,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:01:07,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 20:01:07,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:07,636 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-27 20:01:08,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:08,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:08,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:08,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:08,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:08,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:01:08,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:08,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:08,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:08,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:08,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:01:08,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994424120] [2020-10-27 20:01:08,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:08,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:01:08,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649037697] [2020-10-27 20:01:08,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:01:08,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:08,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:01:08,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:01:08,578 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 19 states. [2020-10-27 20:01:09,111 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-27 20:01:09,396 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-10-27 20:01:10,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:10,058 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2020-10-27 20:01:10,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:01:10,059 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-27 20:01:10,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:10,060 INFO L225 Difference]: With dead ends: 81 [2020-10-27 20:01:10,060 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 20:01:10,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:01:10,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 20:01:10,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-10-27 20:01:10,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 20:01:10,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-27 20:01:10,069 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 47 [2020-10-27 20:01:10,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:10,069 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-27 20:01:10,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:01:10,069 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-27 20:01:10,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 20:01:10,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:10,070 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:10,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:01:10,070 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:10,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1386737829, now seen corresponding path program 16 times [2020-10-27 20:01:10,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:10,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016451786] [2020-10-27 20:01:10,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:10,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:10,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:11,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:11,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 20:01:11,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:11,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-10-27 20:01:11,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:11,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:01:11,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:01:11,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 20:01:11,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:11,539 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-27 20:01:11,956 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-27 20:01:12,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:12,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:12,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:12,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:12,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:12,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:01:12,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:12,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:12,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:12,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:12,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:12,550 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:01:12,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016451786] [2020-10-27 20:01:12,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:12,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:01:12,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166822433] [2020-10-27 20:01:12,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:01:12,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:12,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:01:12,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:01:12,552 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 21 states. [2020-10-27 20:01:13,073 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-27 20:01:13,358 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 70 [2020-10-27 20:01:13,759 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2020-10-27 20:01:14,020 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-27 20:01:14,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:14,560 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-27 20:01:14,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:01:14,565 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-27 20:01:14,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:14,566 INFO L225 Difference]: With dead ends: 72 [2020-10-27 20:01:14,566 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 20:01:14,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:01:14,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 20:01:14,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-27 20:01:14,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 20:01:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-27 20:01:14,574 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 48 [2020-10-27 20:01:14,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:14,574 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-27 20:01:14,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:01:14,574 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-27 20:01:14,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 20:01:14,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:14,575 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:14,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:01:14,575 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:14,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:14,576 INFO L82 PathProgramCache]: Analyzing trace with hash 353752705, now seen corresponding path program 17 times [2020-10-27 20:01:14,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:14,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658888190] [2020-10-27 20:01:14,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:14,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:15,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:15,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 20:01:15,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:15,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 935 [2020-10-27 20:01:15,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:15,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:01:15,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:01:15,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 20:01:15,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:16,000 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-27 20:01:16,192 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-27 20:01:16,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:16,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:16,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:16,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:16,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:16,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:16,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:01:16,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:16,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:16,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:16,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:16,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:01:16,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658888190] [2020-10-27 20:01:16,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:16,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:01:16,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054091614] [2020-10-27 20:01:16,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:01:16,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:16,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:01:16,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:01:16,871 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 22 states. [2020-10-27 20:01:17,576 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2020-10-27 20:01:18,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:18,080 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-27 20:01:18,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:01:18,081 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2020-10-27 20:01:18,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:18,082 INFO L225 Difference]: With dead ends: 73 [2020-10-27 20:01:18,082 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 20:01:18,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:01:18,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 20:01:18,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2020-10-27 20:01:18,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 20:01:18,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-27 20:01:18,092 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 49 [2020-10-27 20:01:18,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:18,092 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-27 20:01:18,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:01:18,092 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-27 20:01:18,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 20:01:18,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:18,093 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:18,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:01:18,093 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:18,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:18,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1273417880, now seen corresponding path program 18 times [2020-10-27 20:01:18,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:18,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291477746] [2020-10-27 20:01:18,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:18,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:19,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:19,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 20:01:19,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:19,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1150 [2020-10-27 20:01:19,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:19,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:01:19,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:01:19,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 20:01:19,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:20,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:20,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:20,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:20,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:20,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:20,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:01:20,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:20,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:20,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:20,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:20,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:20,475 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:01:20,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291477746] [2020-10-27 20:01:20,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:20,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:01:20,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245443893] [2020-10-27 20:01:20,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:01:20,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:20,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:01:20,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:01:20,478 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 22 states. [2020-10-27 20:01:21,214 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2020-10-27 20:01:21,697 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 79 [2020-10-27 20:01:22,052 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-27 20:01:22,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:22,753 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-27 20:01:22,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:01:22,754 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-10-27 20:01:22,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:22,755 INFO L225 Difference]: With dead ends: 78 [2020-10-27 20:01:22,755 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 20:01:22,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:01:22,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 20:01:22,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2020-10-27 20:01:22,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 20:01:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-27 20:01:22,764 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 51 [2020-10-27 20:01:22,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:22,764 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-27 20:01:22,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:01:22,764 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-27 20:01:22,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 20:01:22,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:22,765 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:22,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:01:22,765 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:22,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:22,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1492571124, now seen corresponding path program 19 times [2020-10-27 20:01:22,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:22,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820342138] [2020-10-27 20:01:22,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:22,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:23,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:23,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 20:01:23,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:23,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 988 [2020-10-27 20:01:23,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:23,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:01:23,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:01:23,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 20:01:23,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:24,419 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-27 20:01:24,558 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-27 20:01:24,753 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-27 20:01:25,053 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-10-27 20:01:25,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:25,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:25,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:25,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:25,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:25,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:01:25,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:25,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:25,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:25,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:25,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:01:25,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820342138] [2020-10-27 20:01:25,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:25,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:01:25,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393214048] [2020-10-27 20:01:25,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:01:25,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:25,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:01:25,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:01:25,863 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 23 states. [2020-10-27 20:01:26,478 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-27 20:01:26,856 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 20:01:27,242 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-27 20:01:27,541 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 83 [2020-10-27 20:01:28,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:28,203 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-10-27 20:01:28,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:01:28,203 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-27 20:01:28,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:28,205 INFO L225 Difference]: With dead ends: 79 [2020-10-27 20:01:28,205 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 20:01:28,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=136, Invalid=1270, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:01:28,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 20:01:28,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2020-10-27 20:01:28,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 20:01:28,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-27 20:01:28,218 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 52 [2020-10-27 20:01:28,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:28,218 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-27 20:01:28,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:01:28,218 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-27 20:01:28,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 20:01:28,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:28,219 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:28,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:01:28,219 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:28,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:28,220 INFO L82 PathProgramCache]: Analyzing trace with hash 764401093, now seen corresponding path program 20 times [2020-10-27 20:01:28,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:28,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234086913] [2020-10-27 20:01:28,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:28,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:29,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:29,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 20:01:29,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:29,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 898 [2020-10-27 20:01:29,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:29,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:01:29,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:01:29,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 20:01:29,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:29,711 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-27 20:01:29,976 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-27 20:01:30,167 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-27 20:01:30,393 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-27 20:01:30,577 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-27 20:01:31,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:31,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:31,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:31,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:31,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:31,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:01:31,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:31,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:31,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:31,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:31,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 6 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:01:31,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234086913] [2020-10-27 20:01:31,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:31,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:01:31,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94615801] [2020-10-27 20:01:31,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:01:31,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:31,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:01:31,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:01:31,231 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 22 states. [2020-10-27 20:01:31,895 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-27 20:01:32,310 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2020-10-27 20:01:32,517 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-27 20:01:32,800 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 75 [2020-10-27 20:01:33,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:33,758 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-10-27 20:01:33,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:01:33,759 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-10-27 20:01:33,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:33,760 INFO L225 Difference]: With dead ends: 85 [2020-10-27 20:01:33,760 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 20:01:33,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=117, Invalid=1289, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:01:33,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 20:01:33,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-10-27 20:01:33,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 20:01:33,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-27 20:01:33,770 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 54 [2020-10-27 20:01:33,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:33,772 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-27 20:01:33,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:01:33,772 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-27 20:01:33,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 20:01:33,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:33,773 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:33,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:01:33,773 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:33,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:33,774 INFO L82 PathProgramCache]: Analyzing trace with hash 320399009, now seen corresponding path program 21 times [2020-10-27 20:01:33,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:33,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638968458] [2020-10-27 20:01:33,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:33,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:34,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:34,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 20:01:34,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:34,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1028 [2020-10-27 20:01:34,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:34,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:01:34,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:01:34,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 20:01:34,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:35,511 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-27 20:01:35,811 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-27 20:01:35,963 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-27 20:01:36,194 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 71 [2020-10-27 20:01:36,362 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-27 20:01:36,531 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 20:01:37,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:37,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:37,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:37,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:37,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:37,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:01:37,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:37,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:37,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:37,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:37,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:01:37,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638968458] [2020-10-27 20:01:37,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:37,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:01:37,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825358886] [2020-10-27 20:01:37,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:01:37,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:37,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:01:37,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:01:37,232 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 24 states. [2020-10-27 20:01:37,905 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-27 20:01:38,323 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-27 20:01:38,535 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-27 20:01:38,791 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-27 20:01:39,020 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-27 20:01:39,386 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 104 [2020-10-27 20:01:40,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:40,314 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-10-27 20:01:40,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:01:40,315 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-10-27 20:01:40,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:40,316 INFO L225 Difference]: With dead ends: 85 [2020-10-27 20:01:40,316 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 20:01:40,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:01:40,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 20:01:40,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2020-10-27 20:01:40,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 20:01:40,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-27 20:01:40,327 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 55 [2020-10-27 20:01:40,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:40,327 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-27 20:01:40,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:01:40,327 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-27 20:01:40,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 20:01:40,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:40,328 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:40,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 20:01:40,329 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:40,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:40,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1299884012, now seen corresponding path program 22 times [2020-10-27 20:01:40,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:40,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791206136] [2020-10-27 20:01:40,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:40,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:40,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:41,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:41,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 20:01:41,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:41,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1206 [2020-10-27 20:01:41,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:41,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:01:41,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:01:41,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 20:01:41,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:42,037 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-27 20:01:42,175 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-27 20:01:42,380 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-27 20:01:42,544 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-27 20:01:42,785 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2020-10-27 20:01:43,032 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-27 20:01:43,294 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-10-27 20:01:44,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:44,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:44,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:44,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:44,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:44,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:01:44,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:44,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:44,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:44,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:44,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:01:44,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791206136] [2020-10-27 20:01:44,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:44,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:01:44,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529207482] [2020-10-27 20:01:44,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:01:44,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:44,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:01:44,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:01:44,134 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 25 states. [2020-10-27 20:01:44,777 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-27 20:01:45,141 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 20:01:45,567 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-27 20:01:45,770 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 20:01:46,121 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 92 [2020-10-27 20:01:47,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:47,242 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-27 20:01:47,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:01:47,242 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-27 20:01:47,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:47,244 INFO L225 Difference]: With dead ends: 88 [2020-10-27 20:01:47,244 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 20:01:47,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=162, Invalid=1818, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:01:47,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 20:01:47,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 67. [2020-10-27 20:01:47,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 20:01:47,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-27 20:01:47,255 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 58 [2020-10-27 20:01:47,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:47,255 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-27 20:01:47,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:01:47,255 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-27 20:01:47,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 20:01:47,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:47,256 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:47,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 20:01:47,267 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:47,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:47,267 INFO L82 PathProgramCache]: Analyzing trace with hash -259499686, now seen corresponding path program 23 times [2020-10-27 20:01:47,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:47,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432300818] [2020-10-27 20:01:47,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:47,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:48,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:48,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 20:01:48,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:48,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1491 [2020-10-27 20:01:48,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:48,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:01:48,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:01:48,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 20:01:48,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:01:49,392 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-27 20:01:49,684 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-27 20:01:49,992 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-10-27 20:01:50,242 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-10-27 20:01:50,573 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 78 [2020-10-27 20:01:51,020 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-27 20:01:51,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:51,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:51,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:51,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:51,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:51,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:01:51,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:51,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:51,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:51,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:51,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:51,870 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:01:51,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432300818] [2020-10-27 20:01:51,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:51,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:01:51,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987604030] [2020-10-27 20:01:51,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:01:51,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:51,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:01:51,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:01:51,871 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 26 states. [2020-10-27 20:01:52,444 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-27 20:01:52,724 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 20:01:53,130 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 81 [2020-10-27 20:01:53,384 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-27 20:01:53,763 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 89 [2020-10-27 20:01:53,983 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 20:01:54,329 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 92 [2020-10-27 20:01:55,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:01:55,313 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2020-10-27 20:01:55,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:01:55,314 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-10-27 20:01:55,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:01:55,315 INFO L225 Difference]: With dead ends: 108 [2020-10-27 20:01:55,315 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 20:01:55,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=171, Invalid=1635, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:01:55,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 20:01:55,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2020-10-27 20:01:55,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 20:01:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-10-27 20:01:55,327 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 59 [2020-10-27 20:01:55,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:01:55,327 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-10-27 20:01:55,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:01:55,328 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-10-27 20:01:55,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 20:01:55,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:01:55,328 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:01:55,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 20:01:55,329 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:01:55,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:01:55,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1129799361, now seen corresponding path program 24 times [2020-10-27 20:01:55,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:01:55,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283499298] [2020-10-27 20:01:55,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:01:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:55,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:56,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:56,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 20:01:56,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:56,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1348 [2020-10-27 20:01:56,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:56,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:01:56,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:01:56,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 20:01:56,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:57,359 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-27 20:01:57,594 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-27 20:01:57,949 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-27 20:01:58,117 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-27 20:01:58,394 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-27 20:01:58,589 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-10-27 20:01:58,805 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-10-27 20:01:58,976 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-27 20:01:59,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:01:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:01:59,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:01:59,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:01:59,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:01:59,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:01:59,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:01:59,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:01:59,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:01:59,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:01:59,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:01:59,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:01:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 7 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:01:59,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283499298] [2020-10-27 20:01:59,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:01:59,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:01:59,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652789939] [2020-10-27 20:01:59,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:01:59,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:01:59,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:01:59,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=550, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:01:59,853 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 25 states. [2020-10-27 20:02:00,620 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-27 20:02:01,041 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2020-10-27 20:02:01,534 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 74 [2020-10-27 20:02:02,087 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 83 [2020-10-27 20:02:03,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:02:03,441 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2020-10-27 20:02:03,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:02:03,442 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 61 [2020-10-27 20:02:03,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:02:03,443 INFO L225 Difference]: With dead ends: 101 [2020-10-27 20:02:03,443 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 20:02:03,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=137, Invalid=1755, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 20:02:03,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 20:02:03,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-10-27 20:02:03,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 20:02:03,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-27 20:02:03,457 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 61 [2020-10-27 20:02:03,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:02:03,457 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-27 20:02:03,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:02:03,457 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-27 20:02:03,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 20:02:03,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:02:03,458 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:02:03,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 20:02:03,458 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:02:03,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:02:03,459 INFO L82 PathProgramCache]: Analyzing trace with hash -103674221, now seen corresponding path program 25 times [2020-10-27 20:02:03,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:02:03,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094507869] [2020-10-27 20:02:03,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:02:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:03,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:05,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:05,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 20:02:05,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:05,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1901 [2020-10-27 20:02:05,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:05,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 20:02:05,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:02:05,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 20:02:05,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:05,972 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-10-27 20:02:06,218 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-27 20:02:06,365 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-10-27 20:02:06,622 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-27 20:02:06,800 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-27 20:02:07,095 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2020-10-27 20:02:07,333 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-10-27 20:02:07,767 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2020-10-27 20:02:08,329 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2020-10-27 20:02:09,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:02:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:09,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:09,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:09,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:02:09,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:09,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:02:09,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:09,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:02:09,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:02:09,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:02:09,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:02:09,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094507869] [2020-10-27 20:02:09,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:02:09,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:02:09,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953480738] [2020-10-27 20:02:09,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:02:09,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:02:09,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:02:09,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:02:09,345 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 27 states. [2020-10-27 20:02:10,032 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-27 20:02:10,355 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 20:02:10,720 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-27 20:02:11,215 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 94 [2020-10-27 20:02:11,470 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-27 20:02:11,903 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 99 [2020-10-27 20:02:12,252 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-27 20:02:13,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:02:13,335 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-10-27 20:02:13,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:02:13,336 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-27 20:02:13,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:02:13,337 INFO L225 Difference]: With dead ends: 92 [2020-10-27 20:02:13,338 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 20:02:13,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:02:13,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 20:02:13,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2020-10-27 20:02:13,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 20:02:13,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-27 20:02:13,351 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 62 [2020-10-27 20:02:13,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:02:13,352 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-27 20:02:13,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:02:13,352 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-27 20:02:13,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 20:02:13,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:02:13,352 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:02:13,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 20:02:13,353 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:02:13,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:02:13,353 INFO L82 PathProgramCache]: Analyzing trace with hash -820131949, now seen corresponding path program 26 times [2020-10-27 20:02:13,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:02:13,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743535124] [2020-10-27 20:02:13,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:02:13,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:13,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:15,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:15,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 20:02:15,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:15,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1727 [2020-10-27 20:02:15,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:15,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:02:15,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:02:15,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 20:02:15,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:15,697 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-27 20:02:15,966 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-27 20:02:16,124 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-27 20:02:16,377 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-10-27 20:02:16,725 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2020-10-27 20:02:16,972 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-27 20:02:17,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:02:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:17,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:17,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:17,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:02:17,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:17,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:02:17,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:17,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:02:17,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:02:17,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:02:17,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:02:17,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743535124] [2020-10-27 20:02:17,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:02:17,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:02:17,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805092427] [2020-10-27 20:02:17,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:02:17,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:02:17,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:02:17,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:02:17,973 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 28 states. [2020-10-27 20:02:19,091 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 77 [2020-10-27 20:02:19,314 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 20:02:19,577 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-27 20:02:19,975 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 97 [2020-10-27 20:02:20,442 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 102 [2020-10-27 20:02:21,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:02:21,426 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-10-27 20:02:21,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:02:21,427 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-27 20:02:21,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:02:21,429 INFO L225 Difference]: With dead ends: 93 [2020-10-27 20:02:21,429 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 20:02:21,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=171, Invalid=1721, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 20:02:21,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 20:02:21,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2020-10-27 20:02:21,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 20:02:21,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-27 20:02:21,445 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 63 [2020-10-27 20:02:21,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:02:21,445 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-27 20:02:21,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:02:21,445 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-27 20:02:21,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 20:02:21,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:02:21,446 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:02:21,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 20:02:21,446 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:02:21,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:02:21,447 INFO L82 PathProgramCache]: Analyzing trace with hash -766893382, now seen corresponding path program 27 times [2020-10-27 20:02:21,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:02:21,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286205393] [2020-10-27 20:02:21,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:02:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:21,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:23,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:23,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 20:02:23,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:23,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2242 [2020-10-27 20:02:23,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:23,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:02:23,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:02:23,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 20:02:23,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:24,468 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-27 20:02:24,752 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-10-27 20:02:24,907 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-10-27 20:02:25,151 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2020-10-27 20:02:25,311 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-27 20:02:25,549 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2020-10-27 20:02:26,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:02:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:26,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:26,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:26,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:02:26,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:26,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:02:26,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:26,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:02:26,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:02:26,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:02:26,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:26,791 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:02:26,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286205393] [2020-10-27 20:02:26,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:02:26,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:02:26,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596936925] [2020-10-27 20:02:26,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:02:26,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:02:26,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:02:26,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:02:26,793 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 28 states. [2020-10-27 20:02:27,663 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2020-10-27 20:02:28,138 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-27 20:02:28,381 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 20:02:28,667 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-10-27 20:02:28,909 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-27 20:02:29,357 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 113 [2020-10-27 20:02:30,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:02:30,751 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-27 20:02:30,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:02:30,752 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 65 [2020-10-27 20:02:30,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:02:30,753 INFO L225 Difference]: With dead ends: 98 [2020-10-27 20:02:30,753 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 20:02:30,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=179, Invalid=2173, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:02:30,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 20:02:30,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2020-10-27 20:02:30,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 20:02:30,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-27 20:02:30,767 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 65 [2020-10-27 20:02:30,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:02:30,767 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-27 20:02:30,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:02:30,767 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-27 20:02:30,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 20:02:30,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:02:30,768 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:02:30,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 20:02:30,768 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:02:30,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:02:30,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1228392890, now seen corresponding path program 28 times [2020-10-27 20:02:30,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:02:30,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600282709] [2020-10-27 20:02:30,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:02:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:30,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:32,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:32,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 20:02:32,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:32,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1905 [2020-10-27 20:02:32,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:32,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 20:02:32,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:02:32,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 20:02:32,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:33,406 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-27 20:02:33,690 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-27 20:02:33,826 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-27 20:02:34,088 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-10-27 20:02:34,267 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-27 20:02:34,539 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-10-27 20:02:34,745 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-10-27 20:02:35,073 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 87 [2020-10-27 20:02:35,322 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2020-10-27 20:02:35,706 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 93 [2020-10-27 20:02:35,975 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-10-27 20:02:36,234 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-10-27 20:02:36,453 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-10-27 20:02:37,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:02:37,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:37,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:37,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:37,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:02:37,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:37,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:02:37,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:37,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:02:37,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:02:37,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:02:37,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:02:37,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600282709] [2020-10-27 20:02:37,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:02:37,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 20:02:37,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145646451] [2020-10-27 20:02:37,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 20:02:37,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:02:37,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 20:02:37,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:02:37,310 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 29 states. [2020-10-27 20:02:38,226 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 69 [2020-10-27 20:02:38,462 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-27 20:02:38,775 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-10-27 20:02:39,050 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-10-27 20:02:39,417 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2020-10-27 20:02:39,754 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-10-27 20:02:40,125 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2020-10-27 20:02:40,459 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-10-27 20:02:41,013 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 119 [2020-10-27 20:02:41,741 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 108 [2020-10-27 20:02:42,398 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 111 [2020-10-27 20:02:43,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:02:43,283 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2020-10-27 20:02:43,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 20:02:43,284 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-27 20:02:43,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:02:43,285 INFO L225 Difference]: With dead ends: 101 [2020-10-27 20:02:43,285 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 20:02:43,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=197, Invalid=2353, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:02:43,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 20:02:43,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-27 20:02:43,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 20:02:43,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-27 20:02:43,303 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 66 [2020-10-27 20:02:43,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:02:43,303 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-27 20:02:43,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:02:43,303 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-27 20:02:43,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 20:02:43,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:02:43,304 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:02:43,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 20:02:43,304 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:02:43,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:02:43,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1879357133, now seen corresponding path program 29 times [2020-10-27 20:02:43,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:02:43,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611596248] [2020-10-27 20:02:43,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:02:43,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:43,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:46,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:46,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 20:02:46,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:46,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2616 [2020-10-27 20:02:46,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:46,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:02:46,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:02:46,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 20:02:46,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:46,637 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-27 20:02:46,899 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-27 20:02:47,056 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-27 20:02:47,298 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-10-27 20:02:47,466 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-27 20:02:47,854 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 84 [2020-10-27 20:02:48,083 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2020-10-27 20:02:48,320 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-27 20:02:48,496 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-27 20:02:49,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:02:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:49,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:49,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:49,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:02:49,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:49,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:02:49,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:49,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:02:49,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:02:49,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:02:49,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:49,533 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 8 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:02:49,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611596248] [2020-10-27 20:02:49,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:02:49,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:02:49,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877678191] [2020-10-27 20:02:49,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:02:49,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:02:49,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:02:49,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:02:49,535 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 28 states. [2020-10-27 20:02:50,217 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2020-10-27 20:02:50,683 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-27 20:02:50,918 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 20:02:51,246 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-27 20:02:51,533 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-27 20:02:51,980 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 100 [2020-10-27 20:02:53,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:02:53,396 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2020-10-27 20:02:53,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:02:53,397 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 68 [2020-10-27 20:02:53,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:02:53,398 INFO L225 Difference]: With dead ends: 105 [2020-10-27 20:02:53,398 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 20:02:53,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=141, Invalid=1839, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:02:53,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 20:02:53,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-10-27 20:02:53,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 20:02:53,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-10-27 20:02:53,413 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2020-10-27 20:02:53,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:02:53,413 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-10-27 20:02:53,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:02:53,413 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-10-27 20:02:53,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 20:02:53,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:02:53,413 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:02:53,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 20:02:53,414 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:02:53,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:02:53,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1641562675, now seen corresponding path program 30 times [2020-10-27 20:02:53,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:02:53,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627871750] [2020-10-27 20:02:53,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:02:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:53,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:55,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:55,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 20:02:55,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:55,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2057 [2020-10-27 20:02:55,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:55,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 20:02:55,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:02:55,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 20:02:55,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:56,084 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-10-27 20:02:56,312 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-27 20:02:56,571 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-27 20:02:57,178 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-27 20:02:57,634 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 86 [2020-10-27 20:02:57,792 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-27 20:02:58,153 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-27 20:02:58,443 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 74 [2020-10-27 20:02:59,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:02:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:02:59,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:02:59,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:02:59,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:02:59,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:02:59,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:02:59,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:02:59,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:02:59,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:02:59,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:02:59,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:02:59,430 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:02:59,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627871750] [2020-10-27 20:02:59,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:02:59,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 20:02:59,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056730763] [2020-10-27 20:02:59,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 20:02:59,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:02:59,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 20:02:59,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:02:59,431 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 30 states. [2020-10-27 20:03:00,743 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-27 20:03:01,059 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-27 20:03:01,744 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 112 [2020-10-27 20:03:02,014 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-27 20:03:02,280 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-10-27 20:03:03,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:03:03,455 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2020-10-27 20:03:03,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:03:03,456 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2020-10-27 20:03:03,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:03:03,457 INFO L225 Difference]: With dead ends: 105 [2020-10-27 20:03:03,457 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 20:03:03,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=186, Invalid=2166, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:03:03,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 20:03:03,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-27 20:03:03,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 20:03:03,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-27 20:03:03,473 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 69 [2020-10-27 20:03:03,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:03:03,473 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-27 20:03:03,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 20:03:03,473 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-27 20:03:03,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 20:03:03,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:03:03,473 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:03:03,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 20:03:03,474 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:03:03,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:03:03,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1006357274, now seen corresponding path program 31 times [2020-10-27 20:03:03,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:03:03,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125675262] [2020-10-27 20:03:03,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:03:03,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:03,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:06,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:06,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 20:03:06,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:03:06,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2832 [2020-10-27 20:03:06,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:06,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 20:03:06,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:03:06,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 20:03:06,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:06,941 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-27 20:03:07,121 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-27 20:03:07,391 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-27 20:03:07,564 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-27 20:03:07,857 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2020-10-27 20:03:08,126 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-27 20:03:09,081 WARN L193 SmtUtils]: Spent 859.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 111 [2020-10-27 20:03:09,647 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 118 [2020-10-27 20:03:10,877 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 141 DAG size of output: 135 [2020-10-27 20:03:11,617 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 141 [2020-10-27 20:03:12,648 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 119 [2020-10-27 20:03:12,942 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2020-10-27 20:03:14,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:03:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:14,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:14,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:14,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:03:14,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:03:14,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:03:14,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:14,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:03:14,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:03:14,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:03:14,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:03:14,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125675262] [2020-10-27 20:03:14,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:03:14,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 20:03:14,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658010355] [2020-10-27 20:03:14,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 20:03:14,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:03:14,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 20:03:14,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=856, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:03:14,212 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 31 states. [2020-10-27 20:03:15,388 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-27 20:03:15,748 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-27 20:03:16,056 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-27 20:03:17,653 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 188 DAG size of output: 145 [2020-10-27 20:03:18,353 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 120 [2020-10-27 20:03:21,974 WARN L193 SmtUtils]: Spent 3.38 s on a formula simplification. DAG size of input: 245 DAG size of output: 188 [2020-10-27 20:03:22,992 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 143 [2020-10-27 20:03:26,358 WARN L193 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 254 DAG size of output: 216 [2020-10-27 20:03:28,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:03:28,906 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-10-27 20:03:28,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 20:03:28,907 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 72 [2020-10-27 20:03:28,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:03:28,908 INFO L225 Difference]: With dead ends: 108 [2020-10-27 20:03:28,908 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 20:03:28,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=197, Invalid=2665, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 20:03:28,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 20:03:28,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-27 20:03:28,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 20:03:28,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-27 20:03:28,929 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 72 [2020-10-27 20:03:28,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:03:28,929 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-27 20:03:28,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 20:03:28,930 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-27 20:03:28,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 20:03:28,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:03:28,930 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:03:28,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 20:03:28,931 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:03:28,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:03:28,931 INFO L82 PathProgramCache]: Analyzing trace with hash 904396076, now seen corresponding path program 32 times [2020-10-27 20:03:28,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:03:28,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919071144] [2020-10-27 20:03:28,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:03:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:29,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:31,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:31,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 20:03:31,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:03:31,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2310 [2020-10-27 20:03:31,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:31,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 20:03:31,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:03:31,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 20:03:31,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:32,131 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-27 20:03:32,297 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-27 20:03:32,545 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-10-27 20:03:32,691 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-27 20:03:32,920 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-27 20:03:33,099 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-27 20:03:33,391 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-10-27 20:03:33,876 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-10-27 20:03:34,037 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-10-27 20:03:34,516 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 101 [2020-10-27 20:03:34,845 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2020-10-27 20:03:35,155 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2020-10-27 20:03:35,412 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-10-27 20:03:35,801 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-27 20:03:36,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:03:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:36,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:36,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:36,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:03:36,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:03:36,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:03:36,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:36,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:03:36,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:03:36,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:03:36,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:03:36,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919071144] [2020-10-27 20:03:36,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:03:36,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 20:03:36,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692963932] [2020-10-27 20:03:36,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 20:03:36,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:03:36,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 20:03:36,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:03:36,789 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 32 states. [2020-10-27 20:03:38,453 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-27 20:03:39,113 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 99 [2020-10-27 20:03:39,493 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-27 20:03:39,974 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2020-10-27 20:03:40,371 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-10-27 20:03:41,017 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 135 [2020-10-27 20:03:43,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:03:43,041 INFO L93 Difference]: Finished difference Result 134 states and 137 transitions. [2020-10-27 20:03:43,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 20:03:43,053 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 73 [2020-10-27 20:03:43,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:03:43,054 INFO L225 Difference]: With dead ends: 134 [2020-10-27 20:03:43,054 INFO L226 Difference]: Without dead ends: 130 [2020-10-27 20:03:43,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=203, Invalid=2659, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 20:03:43,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-27 20:03:43,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 86. [2020-10-27 20:03:43,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 20:03:43,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2020-10-27 20:03:43,074 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 73 [2020-10-27 20:03:43,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:03:43,074 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2020-10-27 20:03:43,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 20:03:43,074 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2020-10-27 20:03:43,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 20:03:43,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:03:43,075 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:03:43,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 20:03:43,075 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:03:43,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:03:43,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1228162259, now seen corresponding path program 33 times [2020-10-27 20:03:43,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:03:43,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872608882] [2020-10-27 20:03:43,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:03:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:43,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:45,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:45,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 20:03:45,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:03:45,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2390 [2020-10-27 20:03:45,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:45,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 20:03:45,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:03:45,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 20:03:45,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:46,293 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-27 20:03:46,415 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-27 20:03:46,645 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-10-27 20:03:47,132 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-27 20:03:47,307 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-27 20:03:47,826 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2020-10-27 20:03:48,067 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-27 20:03:48,665 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 123 [2020-10-27 20:03:48,988 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 20:03:49,306 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-27 20:03:50,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:03:50,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:50,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:50,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:50,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:03:50,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:03:50,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:03:50,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:50,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:03:50,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:03:50,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:03:50,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 9 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:03:50,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872608882] [2020-10-27 20:03:50,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:03:50,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 20:03:50,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118719077] [2020-10-27 20:03:50,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 20:03:50,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:03:50,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 20:03:50,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:03:50,759 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 31 states. [2020-10-27 20:03:51,489 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-27 20:03:51,785 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-10-27 20:03:52,104 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-27 20:03:52,491 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-27 20:03:53,155 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 109 [2020-10-27 20:03:53,703 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-10-27 20:03:54,800 WARN L193 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 142 [2020-10-27 20:03:55,470 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2020-10-27 20:03:57,301 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 218 DAG size of output: 176 [2020-10-27 20:03:58,129 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 130 [2020-10-27 20:04:00,293 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 225 DAG size of output: 205 [2020-10-27 20:04:02,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:02,913 INFO L93 Difference]: Finished difference Result 121 states and 124 transitions. [2020-10-27 20:04:02,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:04:02,915 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 75 [2020-10-27 20:04:02,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:02,915 INFO L225 Difference]: With dead ends: 121 [2020-10-27 20:04:02,915 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 20:04:02,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=167, Invalid=2589, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:04:02,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 20:04:02,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-10-27 20:04:02,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 20:04:02,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-27 20:04:02,933 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 75 [2020-10-27 20:04:02,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:02,934 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-27 20:04:02,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 20:04:02,934 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-27 20:04:02,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 20:04:02,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:02,934 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:04:02,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 20:04:02,935 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:02,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:02,935 INFO L82 PathProgramCache]: Analyzing trace with hash 243990913, now seen corresponding path program 34 times [2020-10-27 20:04:02,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:02,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788749960] [2020-10-27 20:04:02,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:03,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:05,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:05,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 20:04:05,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:05,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2834 [2020-10-27 20:04:05,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:05,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 20:04:05,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:04:05,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 20:04:05,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:06,646 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2020-10-27 20:04:06,830 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-10-27 20:04:07,049 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-27 20:04:07,389 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-27 20:04:07,817 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-27 20:04:08,361 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2020-10-27 20:04:08,785 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2020-10-27 20:04:09,443 WARN L193 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 101 [2020-10-27 20:04:09,821 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 91 [2020-10-27 20:04:10,611 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 104 [2020-10-27 20:04:11,045 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 97 [2020-10-27 20:04:11,477 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-10-27 20:04:11,899 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2020-10-27 20:04:12,165 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-27 20:04:12,404 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-27 20:04:12,631 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-27 20:04:12,890 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-27 20:04:13,108 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-10-27 20:04:13,353 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-10-27 20:04:13,579 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2020-10-27 20:04:14,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:14,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:14,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:14,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:14,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:14,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:04:14,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:14,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:14,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:14,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:14,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:14,262 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 20:04:14,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788749960] [2020-10-27 20:04:14,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:04:14,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 20:04:14,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976491216] [2020-10-27 20:04:14,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 20:04:14,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:14,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 20:04:14,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:04:14,264 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 33 states. [2020-10-27 20:04:14,929 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-10-27 20:04:15,324 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-27 20:04:15,809 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 72 [2020-10-27 20:04:16,102 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58