/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/sll-simple-white-blue-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:33:23,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:33:23,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:33:23,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:33:23,944 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:33:23,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:33:23,953 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:33:23,957 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:33:23,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:33:23,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:33:23,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:33:23,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:33:23,969 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:33:23,970 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:33:23,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:33:23,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:33:23,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:33:23,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:33:23,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:33:23,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:33:23,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:33:23,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:33:23,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:33:23,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:33:23,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:33:23,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:33:23,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:33:23,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:33:23,990 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:33:23,991 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:33:23,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:33:23,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:33:23,993 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:33:23,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:33:23,995 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:33:23,996 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:33:23,996 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:33:23,997 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:33:23,997 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:33:23,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:33:23,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:33:24,000 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:33:24,042 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:33:24,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:33:24,045 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:33:24,045 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:33:24,045 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:33:24,046 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:33:24,046 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:33:24,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:33:24,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:33:24,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:33:24,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:33:24,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:33:24,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:33:24,048 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:33:24,048 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:33:24,048 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:33:24,048 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:33:24,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:33:24,049 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:33:24,049 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:33:24,049 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:33:24,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:33:24,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:33:24,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:33:24,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:33:24,050 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:33:24,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:33:24,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:33:24,051 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:33:24,051 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:33:24,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:33:24,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:33:24,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:33:24,472 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:33:24,473 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:33:24,474 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-simple-white-blue-1.i [2020-10-28 14:33:24,551 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f418fcc1/dcc39c7a91414ee2b2f49ff9d25f0569/FLAGd1e417715 [2020-10-28 14:33:25,248 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:33:25,249 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-simple-white-blue-1.i [2020-10-28 14:33:25,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f418fcc1/dcc39c7a91414ee2b2f49ff9d25f0569/FLAGd1e417715 [2020-10-28 14:33:25,521 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f418fcc1/dcc39c7a91414ee2b2f49ff9d25f0569 [2020-10-28 14:33:25,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:33:25,534 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:33:25,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:33:25,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:33:25,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:33:25,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:33:25" (1/1) ... [2020-10-28 14:33:25,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25f9cb36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:25, skipping insertion in model container [2020-10-28 14:33:25,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:33:25" (1/1) ... [2020-10-28 14:33:25,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:33:25,632 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:33:26,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:33:26,048 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:33:26,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:33:26,191 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:33:26,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:26 WrapperNode [2020-10-28 14:33:26,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:33:26,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:33:26,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:33:26,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:33:26,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:26" (1/1) ... [2020-10-28 14:33:26,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:26" (1/1) ... [2020-10-28 14:33:26,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:26" (1/1) ... [2020-10-28 14:33:26,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:26" (1/1) ... [2020-10-28 14:33:26,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:26" (1/1) ... [2020-10-28 14:33:26,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:26" (1/1) ... [2020-10-28 14:33:26,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:26" (1/1) ... [2020-10-28 14:33:26,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:33:26,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:33:26,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:33:26,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:33:26,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:26" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:33:26,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:33:26,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:33:26,410 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:33:26,410 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:33:26,410 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:33:26,411 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:33:26,411 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:33:26,411 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:33:26,411 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:33:26,411 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:33:26,411 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:33:26,412 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:33:26,412 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:33:26,412 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:33:26,412 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:33:26,412 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:33:26,412 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:33:26,413 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:33:26,413 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:33:26,413 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:33:26,413 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:33:26,413 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:33:26,413 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:33:26,414 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:33:26,414 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:33:26,414 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:33:26,414 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:33:26,414 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:33:26,414 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:33:26,415 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:33:26,415 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:33:26,415 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:33:26,415 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:33:26,415 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:33:26,415 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:33:26,416 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:33:26,416 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:33:26,416 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:33:26,416 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:33:26,416 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:33:26,416 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:33:26,416 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:33:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:33:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:33:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:33:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:33:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:33:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:33:26,418 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:33:26,418 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:33:26,418 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:33:26,418 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:33:26,418 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:33:26,418 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:33:26,419 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:33:26,419 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:33:26,419 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:33:26,419 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:33:26,419 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:33:26,419 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:33:26,420 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:33:26,420 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:33:26,420 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:33:26,420 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:33:26,420 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:33:26,420 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:33:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:33:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:33:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:33:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:33:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:33:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:33:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:33:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:33:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:33:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:33:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:33:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:33:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:33:26,423 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:33:26,423 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:33:26,423 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:33:26,423 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:33:26,423 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:33:26,423 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:33:26,424 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:33:26,424 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:33:26,424 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:33:26,424 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:33:26,424 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:33:26,424 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:33:26,425 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:33:26,425 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:33:26,425 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:33:26,425 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:33:26,425 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:33:26,425 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:33:26,426 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:33:26,426 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:33:26,426 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:33:26,426 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:33:26,426 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:33:26,426 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:33:26,426 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:33:26,427 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:33:26,427 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:33:26,427 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:33:26,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:33:26,427 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:33:26,427 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:33:26,428 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:33:26,428 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:33:26,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:33:26,428 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:33:26,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:33:26,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:33:26,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:33:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:33:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:33:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:33:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:33:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:33:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:33:27,128 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:33:27,128 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-28 14:33:27,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:33:27 BoogieIcfgContainer [2020-10-28 14:33:27,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:33:27,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:33:27,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:33:27,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:33:27,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:33:25" (1/3) ... [2020-10-28 14:33:27,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c64665a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:33:27, skipping insertion in model container [2020-10-28 14:33:27,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:26" (2/3) ... [2020-10-28 14:33:27,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c64665a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:33:27, skipping insertion in model container [2020-10-28 14:33:27,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:33:27" (3/3) ... [2020-10-28 14:33:27,140 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-simple-white-blue-1.i [2020-10-28 14:33:27,152 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:33:27,158 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:33:27,173 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:33:27,202 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:33:27,202 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:33:27,202 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:33:27,202 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:33:27,202 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:33:27,203 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:33:27,203 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:33:27,203 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:33:27,223 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-28 14:33:27,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 14:33:27,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:27,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:27,231 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:27,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:27,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1531111669, now seen corresponding path program 1 times [2020-10-28 14:33:27,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:27,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007948721] [2020-10-28 14:33:27,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:27,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:27,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:27,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:27,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:28,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:28,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 14:33:28,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:33:28,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 852 [2020-10-28 14:33:28,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:28,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:28,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:28,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:33:28,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:28,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:33:28,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:28,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:28,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:28,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:28,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:28,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:33:28,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:28,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:28,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:28,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:28,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:28,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:28,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007948721] [2020-10-28 14:33:28,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:28,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:33:28,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794737617] [2020-10-28 14:33:28,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:33:28,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:28,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:33:28,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:33:28,373 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-10-28 14:33:28,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:28,536 INFO L93 Difference]: Finished difference Result 60 states and 90 transitions. [2020-10-28 14:33:28,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:33:28,539 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-28 14:33:28,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:28,548 INFO L225 Difference]: With dead ends: 60 [2020-10-28 14:33:28,549 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 14:33:28,553 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 [2020-10-28 14:33:28,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 14:33:28,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-28 14:33:28,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 14:33:28,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-10-28 14:33:28,598 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 17 [2020-10-28 14:33:28,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:28,598 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-10-28 14:33:28,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:33:28,599 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-10-28 14:33:28,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:33:28,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:28,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:28,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:33:28,600 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:28,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:28,602 INFO L82 PathProgramCache]: Analyzing trace with hash 978349685, now seen corresponding path program 1 times [2020-10-28 14:33:28,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:28,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975951417] [2020-10-28 14:33:28,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:28,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:28,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:28,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:28,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:33:28,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:28,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-28 14:33:28,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:28,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:28,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:33:28,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:28,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:33:28,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:29,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:29,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:29,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:29,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:29,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:29,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:33:29,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:29,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:29,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:29,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:29,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:29,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:29,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975951417] [2020-10-28 14:33:29,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:29,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 14:33:29,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047576649] [2020-10-28 14:33:29,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:33:29,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:29,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:33:29,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:33:29,050 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 8 states. [2020-10-28 14:33:29,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:29,468 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-10-28 14:33:29,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:33:29,468 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-28 14:33:29,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:29,472 INFO L225 Difference]: With dead ends: 58 [2020-10-28 14:33:29,472 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 14:33:29,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:33:29,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 14:33:29,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2020-10-28 14:33:29,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 14:33:29,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2020-10-28 14:33:29,488 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 19 [2020-10-28 14:33:29,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:29,489 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2020-10-28 14:33:29,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:33:29,489 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2020-10-28 14:33:29,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:33:29,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:29,490 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:29,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:33:29,496 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:29,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:29,496 INFO L82 PathProgramCache]: Analyzing trace with hash 959444282, now seen corresponding path program 1 times [2020-10-28 14:33:29,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:29,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631483542] [2020-10-28 14:33:29,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:29,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:29,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:29,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:30,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:30,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 14:33:30,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:33:30,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 555 [2020-10-28 14:33:30,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:30,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:30,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:33:30,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:30,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:33:30,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:30,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:30,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:30,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:30,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:30,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:30,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:33:30,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:30,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:30,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:30,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:30,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:30,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:30,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:30,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631483542] [2020-10-28 14:33:30,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:30,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:33:30,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277203541] [2020-10-28 14:33:30,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:33:30,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:30,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:33:30,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:33:30,283 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 8 states. [2020-10-28 14:33:30,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:30,893 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2020-10-28 14:33:30,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:33:30,894 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-28 14:33:30,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:30,895 INFO L225 Difference]: With dead ends: 71 [2020-10-28 14:33:30,896 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 14:33:30,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:33:30,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 14:33:30,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 34. [2020-10-28 14:33:30,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 14:33:30,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-28 14:33:30,905 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 21 [2020-10-28 14:33:30,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:30,906 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-28 14:33:30,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:33:30,906 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-28 14:33:30,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:33:30,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:30,907 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:30,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:33:30,908 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:30,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:30,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1289576304, now seen corresponding path program 1 times [2020-10-28 14:33:30,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:30,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886533750] [2020-10-28 14:33:30,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:30,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:31,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:31,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 14:33:31,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:31,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-28 14:33:31,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:31,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:31,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:33:31,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:31,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:33:31,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:31,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:31,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:31,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:31,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:31,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:31,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:33:31,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:31,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:31,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:31,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:31,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:31,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:31,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886533750] [2020-10-28 14:33:31,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:31,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:33:31,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950499906] [2020-10-28 14:33:31,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:33:31,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:31,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:33:31,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:33:31,517 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 9 states. [2020-10-28 14:33:32,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:32,392 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2020-10-28 14:33:32,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:33:32,392 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-28 14:33:32,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:32,394 INFO L225 Difference]: With dead ends: 71 [2020-10-28 14:33:32,394 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 14:33:32,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:33:32,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 14:33:32,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 40. [2020-10-28 14:33:32,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 14:33:32,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-28 14:33:32,405 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 21 [2020-10-28 14:33:32,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:32,405 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-28 14:33:32,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:33:32,405 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-28 14:33:32,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:33:32,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:32,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:32,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:33:32,407 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:32,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:32,408 INFO L82 PathProgramCache]: Analyzing trace with hash -113395659, now seen corresponding path program 1 times [2020-10-28 14:33:32,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:32,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849590479] [2020-10-28 14:33:32,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:32,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:32,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:32,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:32,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:32,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:32,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:33:32,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:33:32,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 548 [2020-10-28 14:33:32,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:32,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:32,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:33:32,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:32,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:33:32,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:33,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:33,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:33,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:33,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:33,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:33,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:33:33,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:33,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:33,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:33,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:33,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:33,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:33,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849590479] [2020-10-28 14:33:33,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:33,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:33:33,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173398414] [2020-10-28 14:33:33,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:33:33,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:33,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:33:33,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:33:33,138 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 7 states. [2020-10-28 14:33:33,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:33,409 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2020-10-28 14:33:33,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:33:33,409 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-28 14:33:33,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:33,410 INFO L225 Difference]: With dead ends: 75 [2020-10-28 14:33:33,411 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 14:33:33,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:33:33,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 14:33:33,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 45. [2020-10-28 14:33:33,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 14:33:33,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-10-28 14:33:33,420 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 22 [2020-10-28 14:33:33,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:33,420 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-10-28 14:33:33,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:33:33,420 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-10-28 14:33:33,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:33:33,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:33,422 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:33,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:33:33,422 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:33,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:33,423 INFO L82 PathProgramCache]: Analyzing trace with hash -28778817, now seen corresponding path program 2 times [2020-10-28 14:33:33,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:33,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283594367] [2020-10-28 14:33:33,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:33,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:33,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:33,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:33:33,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:33,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-28 14:33:33,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:33,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:33,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:33:33,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:33:33,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:33:33,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:33,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:33,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:33,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:33,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:33,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:33,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:33:33,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:33,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:33,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:33,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:33,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:33,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:33:33,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283594367] [2020-10-28 14:33:33,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:33,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:33:33,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554129350] [2020-10-28 14:33:33,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:33:33,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:33,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:33:33,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:33:33,620 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 6 states. [2020-10-28 14:33:33,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:33,739 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2020-10-28 14:33:33,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:33:33,740 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-28 14:33:33,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:33,741 INFO L225 Difference]: With dead ends: 61 [2020-10-28 14:33:33,741 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 14:33:33,741 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 [2020-10-28 14:33:33,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 14:33:33,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-10-28 14:33:33,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 14:33:33,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-10-28 14:33:33,749 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2020-10-28 14:33:33,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:33,749 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-10-28 14:33:33,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:33:33,749 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-10-28 14:33:33,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:33:33,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:33,750 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:33,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:33:33,751 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:33,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:33,751 INFO L82 PathProgramCache]: Analyzing trace with hash -235811078, now seen corresponding path program 1 times [2020-10-28 14:33:33,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:33,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558316562] [2020-10-28 14:33:33,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:33,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:33,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:33,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:33:33,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:33,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-28 14:33:33,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:33,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:33,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:33:33,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:33:33,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:33:33,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:33,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:33,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:34,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:34,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:34,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:34,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:33:34,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:34,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:34,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:34,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:34,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:34,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:33:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:34,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558316562] [2020-10-28 14:33:34,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:34,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:33:34,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017710804] [2020-10-28 14:33:34,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:33:34,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:34,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:33:34,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:33:34,017 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 7 states. [2020-10-28 14:33:34,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:34,187 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2020-10-28 14:33:34,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:33:34,188 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-28 14:33:34,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:34,189 INFO L225 Difference]: With dead ends: 67 [2020-10-28 14:33:34,189 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 14:33:34,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:33:34,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 14:33:34,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2020-10-28 14:33:34,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 14:33:34,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-10-28 14:33:34,206 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 24 [2020-10-28 14:33:34,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:34,206 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-10-28 14:33:34,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:33:34,206 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-10-28 14:33:34,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:33:34,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:34,208 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, 1] [2020-10-28 14:33:34,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:33:34,208 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:34,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:34,208 INFO L82 PathProgramCache]: Analyzing trace with hash -165443440, now seen corresponding path program 1 times [2020-10-28 14:33:34,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:34,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532094323] [2020-10-28 14:33:34,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:34,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:34,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:34,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:33:34,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:34,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-28 14:33:34,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:34,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:34,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:33:34,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:34,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:33:34,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:34,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:34,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:34,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:34,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:34,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:34,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:33:34,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:34,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:34,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:34,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:34,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:34,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:34,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532094323] [2020-10-28 14:33:34,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:34,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:33:34,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371848890] [2020-10-28 14:33:34,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:33:34,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:34,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:33:34,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:33:34,727 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 10 states. [2020-10-28 14:33:35,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:35,270 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2020-10-28 14:33:35,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:33:35,270 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-28 14:33:35,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:35,273 INFO L225 Difference]: With dead ends: 83 [2020-10-28 14:33:35,273 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 14:33:35,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:33:35,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 14:33:35,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 56. [2020-10-28 14:33:35,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 14:33:35,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-10-28 14:33:35,289 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 24 [2020-10-28 14:33:35,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:35,289 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-10-28 14:33:35,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:33:35,289 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-10-28 14:33:35,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:33:35,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:35,292 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:35,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:33:35,292 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:35,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:35,293 INFO L82 PathProgramCache]: Analyzing trace with hash 233999418, now seen corresponding path program 1 times [2020-10-28 14:33:35,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:35,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554757053] [2020-10-28 14:33:35,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:35,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:35,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:35,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:35,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:36,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:36,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:33:36,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:33:36,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1096 [2020-10-28 14:33:36,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:36,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:36,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:33:36,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:36,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:33:36,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:36,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:36,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:36,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:36,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:36,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:36,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:33:36,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:36,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:36,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:36,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:36,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:36,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:36,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554757053] [2020-10-28 14:33:36,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:36,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:33:36,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140790171] [2020-10-28 14:33:36,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:33:36,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:36,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:33:36,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:33:36,682 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 10 states. [2020-10-28 14:33:37,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:37,089 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2020-10-28 14:33:37,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:33:37,090 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-28 14:33:37,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:37,091 INFO L225 Difference]: With dead ends: 83 [2020-10-28 14:33:37,091 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 14:33:37,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:33:37,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 14:33:37,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2020-10-28 14:33:37,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 14:33:37,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2020-10-28 14:33:37,100 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 24 [2020-10-28 14:33:37,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:37,101 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2020-10-28 14:33:37,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:33:37,101 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2020-10-28 14:33:37,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:33:37,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:37,102 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:37,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:33:37,103 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:37,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:37,104 INFO L82 PathProgramCache]: Analyzing trace with hash -2057272659, now seen corresponding path program 1 times [2020-10-28 14:33:37,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:37,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52135165] [2020-10-28 14:33:37,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:37,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:37,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:37,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:37,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:38,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:38,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:33:38,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:33:38,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1194 [2020-10-28 14:33:38,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:38,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:38,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:33:38,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:38,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:33:38,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:38,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:38,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:38,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:38,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:38,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:38,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:33:38,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:38,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:38,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:38,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:38,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:38,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:38,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52135165] [2020-10-28 14:33:38,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:38,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:33:38,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204422259] [2020-10-28 14:33:38,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:33:38,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:38,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:33:38,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:33:38,384 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand 6 states. [2020-10-28 14:33:38,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:38,525 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2020-10-28 14:33:38,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:33:38,525 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-28 14:33:38,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:38,526 INFO L225 Difference]: With dead ends: 75 [2020-10-28 14:33:38,526 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 14:33:38,527 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 [2020-10-28 14:33:38,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 14:33:38,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-28 14:33:38,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 14:33:38,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-28 14:33:38,534 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 25 [2020-10-28 14:33:38,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:38,534 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-28 14:33:38,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:33:38,535 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-28 14:33:38,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:33:38,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:38,536 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:38,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:33:38,536 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:38,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:38,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1326223531, now seen corresponding path program 2 times [2020-10-28 14:33:38,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:38,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765480924] [2020-10-28 14:33:38,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:38,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:38,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:38,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:38,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:33:38,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:38,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-28 14:33:38,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:38,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:38,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:33:38,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:38,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:33:38,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:39,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:39,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:39,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:39,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:39,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:39,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:39,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:39,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:39,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:39,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:39,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:39,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:39,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765480924] [2020-10-28 14:33:39,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:39,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:33:39,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435673004] [2020-10-28 14:33:39,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:33:39,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:39,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:33:39,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:33:39,064 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 11 states. [2020-10-28 14:33:39,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:39,878 INFO L93 Difference]: Finished difference Result 107 states and 133 transitions. [2020-10-28 14:33:39,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:33:39,879 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-28 14:33:39,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:39,880 INFO L225 Difference]: With dead ends: 107 [2020-10-28 14:33:39,880 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 14:33:39,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:33:39,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 14:33:39,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 59. [2020-10-28 14:33:39,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 14:33:39,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-10-28 14:33:39,899 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 26 [2020-10-28 14:33:39,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:39,900 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-10-28 14:33:39,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:33:39,901 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-10-28 14:33:39,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:33:39,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:39,902 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:39,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:33:39,902 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:39,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:39,907 INFO L82 PathProgramCache]: Analyzing trace with hash -926780673, now seen corresponding path program 2 times [2020-10-28 14:33:39,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:39,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153746690] [2020-10-28 14:33:39,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:39,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:39,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:40,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:40,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:42,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:42,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:33:42,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:33:42,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2321 [2020-10-28 14:33:42,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:42,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:42,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:33:42,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:42,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:33:42,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:42,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:42,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:42,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:42,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:42,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:42,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:42,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:42,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:42,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:42,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:42,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:42,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:42,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153746690] [2020-10-28 14:33:42,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:42,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:33:42,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647772788] [2020-10-28 14:33:42,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:33:42,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:42,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:33:42,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:33:42,513 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 11 states. [2020-10-28 14:33:43,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:43,124 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-10-28 14:33:43,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:33:43,125 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-28 14:33:43,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:43,126 INFO L225 Difference]: With dead ends: 92 [2020-10-28 14:33:43,126 INFO L226 Difference]: Without dead ends: 88 [2020-10-28 14:33:43,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:33:43,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-28 14:33:43,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 57. [2020-10-28 14:33:43,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 14:33:43,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2020-10-28 14:33:43,140 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 26 [2020-10-28 14:33:43,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:43,141 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2020-10-28 14:33:43,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:33:43,141 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2020-10-28 14:33:43,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:33:43,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:43,146 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, 1] [2020-10-28 14:33:43,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:33:43,146 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:43,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:43,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1016701072, now seen corresponding path program 3 times [2020-10-28 14:33:43,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:43,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792317316] [2020-10-28 14:33:43,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:43,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:43,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:43,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:33:43,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:43,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-28 14:33:43,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:43,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:43,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:33:43,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:43,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:33:43,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:43,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:43,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:43,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:43,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:43,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:43,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:33:43,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:43,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:43,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:43,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:43,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:43,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:43,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792317316] [2020-10-28 14:33:43,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:43,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:33:43,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212195360] [2020-10-28 14:33:43,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:33:43,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:43,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:33:43,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:33:43,542 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand 10 states. [2020-10-28 14:33:44,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:44,130 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2020-10-28 14:33:44,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:33:44,131 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-28 14:33:44,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:44,132 INFO L225 Difference]: With dead ends: 99 [2020-10-28 14:33:44,132 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 14:33:44,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:33:44,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 14:33:44,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-28 14:33:44,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 14:33:44,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2020-10-28 14:33:44,145 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 27 [2020-10-28 14:33:44,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:44,145 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2020-10-28 14:33:44,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:33:44,146 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2020-10-28 14:33:44,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:33:44,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:44,147 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, 1, 1, 1, 1] [2020-10-28 14:33:44,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:33:44,147 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:44,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:44,149 INFO L82 PathProgramCache]: Analyzing trace with hash -535493466, now seen corresponding path program 1 times [2020-10-28 14:33:44,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:44,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301077029] [2020-10-28 14:33:44,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:44,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:44,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:44,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:44,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:45,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:45,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:33:45,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:33:45,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1282 [2020-10-28 14:33:45,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:45,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:45,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:33:45,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:45,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:33:45,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:45,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:45,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:45,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:45,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:45,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:45,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 14:33:45,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:45,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:45,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:45,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:45,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:45,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 14:33:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:45,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301077029] [2020-10-28 14:33:45,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:45,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:33:45,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140376907] [2020-10-28 14:33:45,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:33:45,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:45,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:33:45,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:33:45,722 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 10 states. [2020-10-28 14:33:46,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:46,223 INFO L93 Difference]: Finished difference Result 115 states and 141 transitions. [2020-10-28 14:33:46,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:33:46,224 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-28 14:33:46,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:46,225 INFO L225 Difference]: With dead ends: 115 [2020-10-28 14:33:46,225 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 14:33:46,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:33:46,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 14:33:46,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 77. [2020-10-28 14:33:46,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 14:33:46,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2020-10-28 14:33:46,241 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 27 [2020-10-28 14:33:46,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:46,241 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2020-10-28 14:33:46,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:33:46,242 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2020-10-28 14:33:46,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:33:46,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:46,242 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, 1, 1, 1, 1] [2020-10-28 14:33:46,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:33:46,243 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:46,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:46,243 INFO L82 PathProgramCache]: Analyzing trace with hash 613250184, now seen corresponding path program 1 times [2020-10-28 14:33:46,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:46,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781390291] [2020-10-28 14:33:46,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:46,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:46,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:47,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:47,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:33:47,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:47,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 829 [2020-10-28 14:33:47,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:47,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:47,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:33:47,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:47,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:33:47,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:47,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:47,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:47,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:47,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:47,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:47,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:47,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:47,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:47,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:47,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:47,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:47,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:33:47,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781390291] [2020-10-28 14:33:47,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:47,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:33:47,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730889394] [2020-10-28 14:33:47,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:33:47,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:47,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:33:47,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:33:47,468 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand 11 states. [2020-10-28 14:33:48,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:48,041 INFO L93 Difference]: Finished difference Result 104 states and 128 transitions. [2020-10-28 14:33:48,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:33:48,041 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-28 14:33:48,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:48,042 INFO L225 Difference]: With dead ends: 104 [2020-10-28 14:33:48,042 INFO L226 Difference]: Without dead ends: 97 [2020-10-28 14:33:48,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:33:48,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-28 14:33:48,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 81. [2020-10-28 14:33:48,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 14:33:48,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2020-10-28 14:33:48,055 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 27 [2020-10-28 14:33:48,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:48,055 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2020-10-28 14:33:48,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:33:48,056 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2020-10-28 14:33:48,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:33:48,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:48,056 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:48,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:33:48,057 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:48,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:48,057 INFO L82 PathProgramCache]: Analyzing trace with hash -144394022, now seen corresponding path program 4 times [2020-10-28 14:33:48,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:48,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643887372] [2020-10-28 14:33:48,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:48,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:48,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:48,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 14:33:48,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:48,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-28 14:33:48,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:48,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:48,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:33:48,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:48,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:33:48,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:48,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:48,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:48,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:48,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:48,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:48,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:48,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:48,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:48,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:48,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:48,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:48,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:48,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643887372] [2020-10-28 14:33:48,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:48,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:33:48,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740584781] [2020-10-28 14:33:48,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:33:48,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:48,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:33:48,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:33:48,646 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand 12 states. [2020-10-28 14:33:49,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:49,479 INFO L93 Difference]: Finished difference Result 112 states and 136 transitions. [2020-10-28 14:33:49,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:33:49,481 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-28 14:33:49,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:49,483 INFO L225 Difference]: With dead ends: 112 [2020-10-28 14:33:49,483 INFO L226 Difference]: Without dead ends: 108 [2020-10-28 14:33:49,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:33:49,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-28 14:33:49,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-10-28 14:33:49,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 14:33:49,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2020-10-28 14:33:49,499 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 28 [2020-10-28 14:33:49,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:49,500 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2020-10-28 14:33:49,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:33:49,500 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2020-10-28 14:33:49,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:33:49,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:49,502 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:49,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:33:49,502 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:49,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:49,503 INFO L82 PathProgramCache]: Analyzing trace with hash 255048836, now seen corresponding path program 3 times [2020-10-28 14:33:49,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:49,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687157313] [2020-10-28 14:33:49,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:49,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:49,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:49,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:50,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:51,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:51,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 14:33:51,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:33:51,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2211 [2020-10-28 14:33:51,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:51,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:51,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:33:51,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:51,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:33:51,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:52,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:52,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:52,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:52,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:52,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:52,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:52,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:52,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:52,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:52,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:52,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:52,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:52,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687157313] [2020-10-28 14:33:52,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:52,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:33:52,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966097307] [2020-10-28 14:33:52,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:33:52,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:52,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:33:52,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:33:52,321 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand 13 states. [2020-10-28 14:33:52,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:52,923 INFO L93 Difference]: Finished difference Result 98 states and 120 transitions. [2020-10-28 14:33:52,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:33:52,924 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-28 14:33:52,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:52,925 INFO L225 Difference]: With dead ends: 98 [2020-10-28 14:33:52,925 INFO L226 Difference]: Without dead ends: 94 [2020-10-28 14:33:52,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:33:52,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-28 14:33:52,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 65. [2020-10-28 14:33:52,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 14:33:52,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-10-28 14:33:52,940 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 28 [2020-10-28 14:33:52,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:52,941 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-10-28 14:33:52,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:33:52,941 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-10-28 14:33:52,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:33:52,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:52,942 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:52,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:33:52,943 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:52,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:52,943 INFO L82 PathProgramCache]: Analyzing trace with hash -2008825203, now seen corresponding path program 1 times [2020-10-28 14:33:52,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:52,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900677954] [2020-10-28 14:33:52,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:52,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:53,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:53,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:33:53,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:53,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-28 14:33:53,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:53,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:53,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:33:53,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:53,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:33:53,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:53,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:53,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:53,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:53,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:53,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:53,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:53,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:53,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:53,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:53,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:53,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:53,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:53,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:53,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:53,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900677954] [2020-10-28 14:33:53,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:53,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:33:53,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450789622] [2020-10-28 14:33:53,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:33:53,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:53,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:33:53,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:33:53,358 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 11 states. [2020-10-28 14:33:53,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:53,783 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2020-10-28 14:33:53,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:33:53,784 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-28 14:33:53,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:53,785 INFO L225 Difference]: With dead ends: 98 [2020-10-28 14:33:53,785 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 14:33:53,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:33:53,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 14:33:53,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 65. [2020-10-28 14:33:53,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 14:33:53,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-10-28 14:33:53,797 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 29 [2020-10-28 14:33:53,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:53,797 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-10-28 14:33:53,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:33:53,798 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-10-28 14:33:53,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:33:53,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:53,798 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:53,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:33:53,799 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:53,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:53,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1001289813, now seen corresponding path program 5 times [2020-10-28 14:33:53,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:53,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061845679] [2020-10-28 14:33:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:53,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:54,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:54,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:33:54,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:54,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-10-28 14:33:54,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:54,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:54,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:33:54,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:54,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:33:54,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:54,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:54,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:54,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:54,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:54,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:54,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:54,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:54,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:54,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:54,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:54,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:54,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:54,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:54,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061845679] [2020-10-28 14:33:54,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:54,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:33:54,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120275949] [2020-10-28 14:33:54,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:33:54,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:54,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:33:54,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:33:54,403 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 12 states. [2020-10-28 14:33:55,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:55,332 INFO L93 Difference]: Finished difference Result 107 states and 131 transitions. [2020-10-28 14:33:55,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:33:55,332 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-28 14:33:55,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:55,333 INFO L225 Difference]: With dead ends: 107 [2020-10-28 14:33:55,333 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 14:33:55,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:33:55,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 14:33:55,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 76. [2020-10-28 14:33:55,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 14:33:55,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2020-10-28 14:33:55,349 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 29 [2020-10-28 14:33:55,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:55,350 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2020-10-28 14:33:55,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:33:55,350 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2020-10-28 14:33:55,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:33:55,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:55,351 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:55,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:33:55,351 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:55,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:55,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1741482945, now seen corresponding path program 2 times [2020-10-28 14:33:55,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:55,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284114848] [2020-10-28 14:33:55,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:55,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:55,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:55,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:56,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:57,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:57,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:33:57,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:33:57,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2010 [2020-10-28 14:33:57,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:57,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:57,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:33:57,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:57,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:33:57,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:57,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:57,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:57,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:57,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:57,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:57,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:57,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:57,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:57,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:57,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:57,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:57,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:33:57,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284114848] [2020-10-28 14:33:57,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:57,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:33:57,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231898720] [2020-10-28 14:33:57,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:33:57,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:57,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:33:57,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:33:57,466 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand 8 states. [2020-10-28 14:33:57,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:57,713 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2020-10-28 14:33:57,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:33:57,713 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-28 14:33:57,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:57,714 INFO L225 Difference]: With dead ends: 97 [2020-10-28 14:33:57,714 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 14:33:57,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:33:57,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 14:33:57,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2020-10-28 14:33:57,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 14:33:57,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2020-10-28 14:33:57,733 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 29 [2020-10-28 14:33:57,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:57,733 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2020-10-28 14:33:57,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:33:57,734 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2020-10-28 14:33:57,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:33:57,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:57,734 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:57,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:33:57,734 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:57,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:57,735 INFO L82 PathProgramCache]: Analyzing trace with hash 429496162, now seen corresponding path program 1 times [2020-10-28 14:33:57,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:57,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706340233] [2020-10-28 14:33:57,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:57,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:57,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:58,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:58,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:33:58,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:58,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 845 [2020-10-28 14:33:58,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:58,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:58,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:33:58,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:58,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:33:58,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:58,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:58,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:58,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:58,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:58,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:58,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:58,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:58,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:58,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:58,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:58,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:58,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:58,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:58,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706340233] [2020-10-28 14:33:58,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:58,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:33:58,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004536878] [2020-10-28 14:33:58,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:33:58,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:58,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:33:58,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:33:58,815 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand 12 states. [2020-10-28 14:33:59,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:59,481 INFO L93 Difference]: Finished difference Result 111 states and 133 transitions. [2020-10-28 14:33:59,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:33:59,482 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-28 14:33:59,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:59,483 INFO L225 Difference]: With dead ends: 111 [2020-10-28 14:33:59,483 INFO L226 Difference]: Without dead ends: 107 [2020-10-28 14:33:59,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:33:59,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-28 14:33:59,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-10-28 14:33:59,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 14:33:59,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2020-10-28 14:33:59,496 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 30 [2020-10-28 14:33:59,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:59,496 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2020-10-28 14:33:59,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:33:59,497 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2020-10-28 14:33:59,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:33:59,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:59,497 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, 1, 1, 1, 1, 1] [2020-10-28 14:33:59,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:33:59,498 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:59,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:59,498 INFO L82 PathProgramCache]: Analyzing trace with hash -677469358, now seen corresponding path program 2 times [2020-10-28 14:33:59,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:59,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068783748] [2020-10-28 14:33:59,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:59,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:59,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:59,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:33:59,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:59,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-28 14:33:59,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:59,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:59,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:33:59,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:59,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:33:59,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:59,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:59,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:59,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:59,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:59,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:59,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:59,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:59,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:59,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:59,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:59,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:59,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:59,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068783748] [2020-10-28 14:33:59,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:59,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:33:59,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351038227] [2020-10-28 14:33:59,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:33:59,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:59,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:33:59,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:33:59,855 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand 11 states. [2020-10-28 14:34:00,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:00,216 INFO L93 Difference]: Finished difference Result 104 states and 122 transitions. [2020-10-28 14:34:00,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:34:00,217 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-28 14:34:00,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:00,218 INFO L225 Difference]: With dead ends: 104 [2020-10-28 14:34:00,218 INFO L226 Difference]: Without dead ends: 88 [2020-10-28 14:34:00,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:34:00,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-28 14:34:00,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2020-10-28 14:34:00,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 14:34:00,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2020-10-28 14:34:00,234 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 31 [2020-10-28 14:34:00,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:00,234 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2020-10-28 14:34:00,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:34:00,234 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2020-10-28 14:34:00,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:34:00,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:00,235 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, 1, 1, 1, 1, 1] [2020-10-28 14:34:00,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:34:00,235 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:00,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:00,235 INFO L82 PathProgramCache]: Analyzing trace with hash 27152104, now seen corresponding path program 3 times [2020-10-28 14:34:00,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:00,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687410829] [2020-10-28 14:34:00,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:00,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:00,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:01,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:01,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:34:01,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:01,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 798 [2020-10-28 14:34:01,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:01,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:01,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:34:01,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:01,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:34:01,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:01,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:01,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:01,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:01,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:01,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:01,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:01,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:01,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:01,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:01,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:01,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:01,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:01,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:01,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687410829] [2020-10-28 14:34:01,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:01,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:34:01,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894705822] [2020-10-28 14:34:01,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:34:01,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:01,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:34:01,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:34:01,340 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand 13 states. [2020-10-28 14:34:02,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:02,003 INFO L93 Difference]: Finished difference Result 123 states and 147 transitions. [2020-10-28 14:34:02,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:34:02,004 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-28 14:34:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:02,005 INFO L225 Difference]: With dead ends: 123 [2020-10-28 14:34:02,005 INFO L226 Difference]: Without dead ends: 119 [2020-10-28 14:34:02,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:34:02,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-28 14:34:02,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 87. [2020-10-28 14:34:02,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 14:34:02,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2020-10-28 14:34:02,021 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 31 [2020-10-28 14:34:02,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:02,022 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2020-10-28 14:34:02,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:34:02,022 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2020-10-28 14:34:02,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:34:02,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:02,023 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:02,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:34:02,023 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:02,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:02,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1034687494, now seen corresponding path program 6 times [2020-10-28 14:34:02,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:02,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949012739] [2020-10-28 14:34:02,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:02,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:02,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:02,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:34:02,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:02,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-10-28 14:34:02,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:02,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:02,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:34:02,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:02,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:34:02,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:02,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:02,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:02,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:02,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:02,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:02,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:02,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:02,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:02,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:02,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:02,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:02,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:02,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949012739] [2020-10-28 14:34:02,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:02,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:34:02,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880917899] [2020-10-28 14:34:02,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:34:02,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:02,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:34:02,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:34:02,782 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand 13 states. [2020-10-28 14:34:04,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:04,350 INFO L93 Difference]: Finished difference Result 146 states and 178 transitions. [2020-10-28 14:34:04,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:34:04,351 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-28 14:34:04,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:04,352 INFO L225 Difference]: With dead ends: 146 [2020-10-28 14:34:04,352 INFO L226 Difference]: Without dead ends: 142 [2020-10-28 14:34:04,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:34:04,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-28 14:34:04,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 91. [2020-10-28 14:34:04,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-28 14:34:04,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2020-10-28 14:34:04,371 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 31 [2020-10-28 14:34:04,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:04,371 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2020-10-28 14:34:04,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:34:04,372 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2020-10-28 14:34:04,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:34:04,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:04,372 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, 1] [2020-10-28 14:34:04,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:34:04,375 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:04,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:04,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1757182059, now seen corresponding path program 7 times [2020-10-28 14:34:04,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:04,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374444014] [2020-10-28 14:34:04,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:04,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:04,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:04,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:34:04,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:04,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 367 [2020-10-28 14:34:04,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:04,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:04,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:34:04,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:04,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:34:04,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:34:05,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:05,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:05,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:05,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:05,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:05,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:05,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:05,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:05,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:05,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:05,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:05,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:05,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:34:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:05,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374444014] [2020-10-28 14:34:05,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:05,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:34:05,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936981812] [2020-10-28 14:34:05,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:34:05,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:05,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:34:05,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:34:05,060 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand 12 states. [2020-10-28 14:34:06,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:06,098 INFO L93 Difference]: Finished difference Result 127 states and 151 transitions. [2020-10-28 14:34:06,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:34:06,099 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-28 14:34:06,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:06,100 INFO L225 Difference]: With dead ends: 127 [2020-10-28 14:34:06,100 INFO L226 Difference]: Without dead ends: 106 [2020-10-28 14:34:06,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:34:06,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-28 14:34:06,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 91. [2020-10-28 14:34:06,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-28 14:34:06,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2020-10-28 14:34:06,113 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 32 [2020-10-28 14:34:06,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:06,114 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2020-10-28 14:34:06,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:34:06,114 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2020-10-28 14:34:06,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:34:06,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:06,114 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:06,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:34:06,115 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:06,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:06,115 INFO L82 PathProgramCache]: Analyzing trace with hash -879716761, now seen corresponding path program 2 times [2020-10-28 14:34:06,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:06,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460675668] [2020-10-28 14:34:06,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:06,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:06,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:07,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:07,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:34:07,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:07,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-10-28 14:34:07,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:07,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:07,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:34:07,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:07,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:34:07,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:07,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:07,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:07,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:07,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:07,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:07,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:07,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:07,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:07,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:07,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:07,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:07,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:07,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460675668] [2020-10-28 14:34:07,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:07,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:34:07,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82942074] [2020-10-28 14:34:07,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:34:07,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:07,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:34:07,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:34:07,749 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand 14 states. [2020-10-28 14:34:08,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:08,836 INFO L93 Difference]: Finished difference Result 157 states and 190 transitions. [2020-10-28 14:34:08,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:34:08,836 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-28 14:34:08,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:08,838 INFO L225 Difference]: With dead ends: 157 [2020-10-28 14:34:08,838 INFO L226 Difference]: Without dead ends: 153 [2020-10-28 14:34:08,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:34:08,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-28 14:34:08,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 101. [2020-10-28 14:34:08,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-28 14:34:08,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2020-10-28 14:34:08,854 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 32 [2020-10-28 14:34:08,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:08,854 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2020-10-28 14:34:08,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:34:08,855 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2020-10-28 14:34:08,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:34:08,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:08,855 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:08,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:34:08,856 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:08,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:08,856 INFO L82 PathProgramCache]: Analyzing trace with hash -467646338, now seen corresponding path program 3 times [2020-10-28 14:34:08,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:08,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084937997] [2020-10-28 14:34:08,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:08,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:08,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:09,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:09,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:34:09,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:09,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 590 [2020-10-28 14:34:09,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:09,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:09,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:34:09,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:09,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:34:09,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:09,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:09,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:09,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:09,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:09,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:09,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:34:09,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:09,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:09,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:09,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:09,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:09,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:34:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:09,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084937997] [2020-10-28 14:34:09,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:09,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:34:09,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756682103] [2020-10-28 14:34:09,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:34:09,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:09,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:34:09,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:34:09,848 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand 12 states. [2020-10-28 14:34:10,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:10,721 INFO L93 Difference]: Finished difference Result 138 states and 165 transitions. [2020-10-28 14:34:10,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:34:10,722 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-28 14:34:10,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:10,723 INFO L225 Difference]: With dead ends: 138 [2020-10-28 14:34:10,723 INFO L226 Difference]: Without dead ends: 119 [2020-10-28 14:34:10,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:34:10,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-28 14:34:10,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2020-10-28 14:34:10,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-28 14:34:10,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2020-10-28 14:34:10,744 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 33 [2020-10-28 14:34:10,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:10,744 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2020-10-28 14:34:10,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:34:10,745 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2020-10-28 14:34:10,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:34:10,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:10,746 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:10,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:34:10,746 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:10,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:10,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1686602989, now seen corresponding path program 4 times [2020-10-28 14:34:10,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:10,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178468986] [2020-10-28 14:34:10,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:10,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:10,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:10,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:11,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:14,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:14,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:34:14,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:34:14,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3623 [2020-10-28 14:34:14,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:14,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:14,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:34:14,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:14,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:34:14,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:34:14,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:14,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:14,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:14,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:14,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:14,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:14,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:14,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:14,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:14,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:14,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:14,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:14,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178468986] [2020-10-28 14:34:14,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:14,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:34:14,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014966962] [2020-10-28 14:34:14,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:34:14,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:14,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:34:14,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:34:14,688 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand 13 states. [2020-10-28 14:34:15,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:15,623 INFO L93 Difference]: Finished difference Result 150 states and 181 transitions. [2020-10-28 14:34:15,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:34:15,624 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-28 14:34:15,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:15,625 INFO L225 Difference]: With dead ends: 150 [2020-10-28 14:34:15,625 INFO L226 Difference]: Without dead ends: 133 [2020-10-28 14:34:15,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:34:15,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-28 14:34:15,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 101. [2020-10-28 14:34:15,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-28 14:34:15,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 120 transitions. [2020-10-28 14:34:15,643 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 120 transitions. Word has length 33 [2020-10-28 14:34:15,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:15,643 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 120 transitions. [2020-10-28 14:34:15,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:34:15,643 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 120 transitions. [2020-10-28 14:34:15,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:34:15,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:15,644 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:15,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:34:15,644 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:15,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:15,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1903742845, now seen corresponding path program 5 times [2020-10-28 14:34:15,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:15,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797607584] [2020-10-28 14:34:15,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:15,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:15,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:16,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:16,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:34:16,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:16,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 837 [2020-10-28 14:34:16,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:16,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:16,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:34:16,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:16,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 14:34:16,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:17,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:17,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:17,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:17,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:17,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:17,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:17,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:17,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:17,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:17,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:17,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:17,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:17,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797607584] [2020-10-28 14:34:17,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:17,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:34:17,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016377606] [2020-10-28 14:34:17,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:34:17,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:17,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:34:17,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:34:17,030 INFO L87 Difference]: Start difference. First operand 101 states and 120 transitions. Second operand 14 states. [2020-10-28 14:34:17,258 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-28 14:34:18,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:18,367 INFO L93 Difference]: Finished difference Result 150 states and 180 transitions. [2020-10-28 14:34:18,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:34:18,368 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-28 14:34:18,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:18,369 INFO L225 Difference]: With dead ends: 150 [2020-10-28 14:34:18,369 INFO L226 Difference]: Without dead ends: 146 [2020-10-28 14:34:18,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:34:18,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-28 14:34:18,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 108. [2020-10-28 14:34:18,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 14:34:18,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 130 transitions. [2020-10-28 14:34:18,398 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 130 transitions. Word has length 33 [2020-10-28 14:34:18,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:18,399 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 130 transitions. [2020-10-28 14:34:18,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:34:18,399 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 130 transitions. [2020-10-28 14:34:18,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:34:18,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:18,400 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:18,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:34:18,400 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:18,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:18,401 INFO L82 PathProgramCache]: Analyzing trace with hash -896207455, now seen corresponding path program 8 times [2020-10-28 14:34:18,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:18,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589575625] [2020-10-28 14:34:18,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:18,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:18,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:18,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:34:18,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:18,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-10-28 14:34:18,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:18,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:18,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:34:18,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:18,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 14:34:18,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:19,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:19,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:19,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:19,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:19,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:19,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:19,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:19,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:19,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:19,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:19,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:19,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:19,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589575625] [2020-10-28 14:34:19,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:19,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:34:19,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348681464] [2020-10-28 14:34:19,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:34:19,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:19,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:34:19,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:34:19,246 INFO L87 Difference]: Start difference. First operand 108 states and 130 transitions. Second operand 14 states. [2020-10-28 14:34:20,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:20,732 INFO L93 Difference]: Finished difference Result 166 states and 205 transitions. [2020-10-28 14:34:20,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:34:20,734 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-28 14:34:20,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:20,735 INFO L225 Difference]: With dead ends: 166 [2020-10-28 14:34:20,735 INFO L226 Difference]: Without dead ends: 162 [2020-10-28 14:34:20,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:34:20,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-28 14:34:20,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 108. [2020-10-28 14:34:20,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 14:34:20,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 130 transitions. [2020-10-28 14:34:20,757 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 130 transitions. Word has length 33 [2020-10-28 14:34:20,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:20,757 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 130 transitions. [2020-10-28 14:34:20,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:34:20,757 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 130 transitions. [2020-10-28 14:34:20,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:34:20,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:20,758 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:20,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:34:20,759 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:20,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:20,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1224054972, now seen corresponding path program 6 times [2020-10-28 14:34:20,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:20,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652852714] [2020-10-28 14:34:20,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:20,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:20,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:21,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:21,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:34:21,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:21,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 464 [2020-10-28 14:34:21,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:21,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:21,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:34:21,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:21,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:34:21,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:21,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:21,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:21,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:21,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:21,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:21,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:21,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:21,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:21,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:21,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:21,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:21,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:21,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 14:34:21,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652852714] [2020-10-28 14:34:21,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:21,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:34:21,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304059360] [2020-10-28 14:34:21,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:34:21,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:21,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:34:21,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:34:21,351 INFO L87 Difference]: Start difference. First operand 108 states and 130 transitions. Second operand 8 states. [2020-10-28 14:34:21,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:21,686 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2020-10-28 14:34:21,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:34:21,688 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-28 14:34:21,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:21,689 INFO L225 Difference]: With dead ends: 132 [2020-10-28 14:34:21,690 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 14:34:21,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:34:21,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 14:34:21,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-28 14:34:21,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-28 14:34:21,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2020-10-28 14:34:21,727 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 34 [2020-10-28 14:34:21,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:21,727 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2020-10-28 14:34:21,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:34:21,727 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2020-10-28 14:34:21,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:34:21,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:21,732 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:21,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:34:21,734 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:21,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:21,735 INFO L82 PathProgramCache]: Analyzing trace with hash -75027260, now seen corresponding path program 7 times [2020-10-28 14:34:21,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:21,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104957412] [2020-10-28 14:34:21,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:21,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:21,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:22,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:22,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:34:22,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:22,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 461 [2020-10-28 14:34:22,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:22,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:22,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:34:22,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:22,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:34:22,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:22,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:22,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:22,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:22,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:22,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:22,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:22,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:22,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:22,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:22,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:22,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:22,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:22,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104957412] [2020-10-28 14:34:22,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:22,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:34:22,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524725263] [2020-10-28 14:34:22,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:34:22,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:22,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:34:22,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:34:22,514 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand 13 states. [2020-10-28 14:34:23,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:23,353 INFO L93 Difference]: Finished difference Result 133 states and 161 transitions. [2020-10-28 14:34:23,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:34:23,354 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-28 14:34:23,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:23,358 INFO L225 Difference]: With dead ends: 133 [2020-10-28 14:34:23,359 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 14:34:23,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:34:23,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 14:34:23,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 102. [2020-10-28 14:34:23,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 14:34:23,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2020-10-28 14:34:23,380 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 124 transitions. Word has length 34 [2020-10-28 14:34:23,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:23,380 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 124 transitions. [2020-10-28 14:34:23,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:34:23,381 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 124 transitions. [2020-10-28 14:34:23,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:34:23,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:23,381 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:23,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:34:23,382 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:23,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:23,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1485383334, now seen corresponding path program 9 times [2020-10-28 14:34:23,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:23,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44303279] [2020-10-28 14:34:23,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:23,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:23,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:23,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:23,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:34:23,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:23,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-10-28 14:34:23,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:23,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:23,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:34:23,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:23,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:34:23,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:24,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:24,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:24,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:24,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:24,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:24,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:24,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:24,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:24,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:24,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:24,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:24,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:34:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:24,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44303279] [2020-10-28 14:34:24,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:24,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:34:24,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700751471] [2020-10-28 14:34:24,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:34:24,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:24,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:34:24,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:34:24,147 INFO L87 Difference]: Start difference. First operand 102 states and 124 transitions. Second operand 14 states. [2020-10-28 14:34:25,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:25,412 INFO L93 Difference]: Finished difference Result 138 states and 167 transitions. [2020-10-28 14:34:25,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:34:25,414 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-28 14:34:25,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:25,415 INFO L225 Difference]: With dead ends: 138 [2020-10-28 14:34:25,416 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 14:34:25,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:34:25,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 14:34:25,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 109. [2020-10-28 14:34:25,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-28 14:34:25,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 131 transitions. [2020-10-28 14:34:25,447 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 131 transitions. Word has length 34 [2020-10-28 14:34:25,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:25,447 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 131 transitions. [2020-10-28 14:34:25,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:34:25,447 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 131 transitions. [2020-10-28 14:34:25,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:34:25,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:25,448 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:25,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:34:25,448 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:25,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:25,449 INFO L82 PathProgramCache]: Analyzing trace with hash -607918036, now seen corresponding path program 4 times [2020-10-28 14:34:25,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:25,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814100753] [2020-10-28 14:34:25,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:25,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:25,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:25,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:26,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:26,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:34:26,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:26,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1023 [2020-10-28 14:34:26,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:26,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:26,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:34:26,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:26,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:34:26,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:26,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:26,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:26,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:26,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:26,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:26,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:26,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:26,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:26,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:26,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:26,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:26,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:26,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814100753] [2020-10-28 14:34:26,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:26,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:34:26,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636802995] [2020-10-28 14:34:26,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:34:26,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:26,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:34:26,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:34:26,820 INFO L87 Difference]: Start difference. First operand 109 states and 131 transitions. Second operand 14 states. [2020-10-28 14:34:27,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:27,529 INFO L93 Difference]: Finished difference Result 142 states and 171 transitions. [2020-10-28 14:34:27,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:34:27,530 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-28 14:34:27,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:27,532 INFO L225 Difference]: With dead ends: 142 [2020-10-28 14:34:27,532 INFO L226 Difference]: Without dead ends: 138 [2020-10-28 14:34:27,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:34:27,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-28 14:34:27,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-28 14:34:27,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-28 14:34:27,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2020-10-28 14:34:27,553 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 34 [2020-10-28 14:34:27,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:27,553 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2020-10-28 14:34:27,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:34:27,554 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2020-10-28 14:34:27,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:34:27,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:27,554 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:27,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:34:27,555 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:27,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:27,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1308930638, now seen corresponding path program 8 times [2020-10-28 14:34:27,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:27,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615284344] [2020-10-28 14:34:27,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:27,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:27,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:28,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:28,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:34:28,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:28,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 545 [2020-10-28 14:34:28,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:28,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:28,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:34:28,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:28,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:34:28,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:28,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:28,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:28,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:28,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:28,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:28,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:28,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:28,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:28,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:28,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:28,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:28,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:34:28,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615284344] [2020-10-28 14:34:28,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:28,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:34:28,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679646903] [2020-10-28 14:34:28,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:34:28,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:28,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:34:28,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:34:28,304 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand 12 states. [2020-10-28 14:34:28,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:28,794 INFO L93 Difference]: Finished difference Result 121 states and 146 transitions. [2020-10-28 14:34:28,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:34:28,795 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-28 14:34:28,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:28,796 INFO L225 Difference]: With dead ends: 121 [2020-10-28 14:34:28,796 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 14:34:28,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:34:28,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 14:34:28,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2020-10-28 14:34:28,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-28 14:34:28,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 119 transitions. [2020-10-28 14:34:28,813 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 119 transitions. Word has length 35 [2020-10-28 14:34:28,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:28,814 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 119 transitions. [2020-10-28 14:34:28,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:34:28,814 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 119 transitions. [2020-10-28 14:34:28,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:34:28,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:28,814 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:28,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:34:28,815 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:28,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:28,815 INFO L82 PathProgramCache]: Analyzing trace with hash -631820455, now seen corresponding path program 5 times [2020-10-28 14:34:28,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:28,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320503696] [2020-10-28 14:34:28,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:28,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:28,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:29,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:29,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:34:29,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:29,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 952 [2020-10-28 14:34:29,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:29,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:29,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:34:29,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:29,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:34:29,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:30,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:30,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:30,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:30,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:30,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:30,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:30,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:30,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:30,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:30,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:30,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:30,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:30,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320503696] [2020-10-28 14:34:30,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:30,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:34:30,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520725233] [2020-10-28 14:34:30,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:34:30,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:30,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:34:30,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:34:30,122 INFO L87 Difference]: Start difference. First operand 99 states and 119 transitions. Second operand 14 states. [2020-10-28 14:34:31,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:31,063 INFO L93 Difference]: Finished difference Result 133 states and 160 transitions. [2020-10-28 14:34:31,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:34:31,064 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-28 14:34:31,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:31,065 INFO L225 Difference]: With dead ends: 133 [2020-10-28 14:34:31,065 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 14:34:31,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:34:31,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 14:34:31,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 100. [2020-10-28 14:34:31,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 14:34:31,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 120 transitions. [2020-10-28 14:34:31,082 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 120 transitions. Word has length 35 [2020-10-28 14:34:31,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:31,082 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 120 transitions. [2020-10-28 14:34:31,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:34:31,083 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 120 transitions. [2020-10-28 14:34:31,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:34:31,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:31,083 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:31,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:34:31,083 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:31,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:31,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1522428872, now seen corresponding path program 9 times [2020-10-28 14:34:31,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:31,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996634555] [2020-10-28 14:34:31,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:31,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:31,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:31,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:31,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:33,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:33,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:34:33,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:34:33,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2214 [2020-10-28 14:34:33,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:33,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:33,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:34:33,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:33,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:34:33,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:33,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:33,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:33,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:33,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:33,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:33,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:33,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:33,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:33,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:33,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:33,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:33,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:33,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:33,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996634555] [2020-10-28 14:34:33,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:33,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:34:33,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940084613] [2020-10-28 14:34:33,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:34:33,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:33,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:34:33,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:34:33,759 INFO L87 Difference]: Start difference. First operand 100 states and 120 transitions. Second operand 14 states. [2020-10-28 14:34:34,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:34,405 INFO L93 Difference]: Finished difference Result 135 states and 161 transitions. [2020-10-28 14:34:34,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:34:34,406 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-28 14:34:34,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:34,407 INFO L225 Difference]: With dead ends: 135 [2020-10-28 14:34:34,407 INFO L226 Difference]: Without dead ends: 127 [2020-10-28 14:34:34,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:34:34,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-28 14:34:34,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 102. [2020-10-28 14:34:34,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 14:34:34,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 123 transitions. [2020-10-28 14:34:34,431 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 123 transitions. Word has length 35 [2020-10-28 14:34:34,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:34,431 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 123 transitions. [2020-10-28 14:34:34,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:34:34,431 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 123 transitions. [2020-10-28 14:34:34,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:34:34,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:34,432 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:34,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:34:34,432 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:34,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:34,433 INFO L82 PathProgramCache]: Analyzing trace with hash -2067916962, now seen corresponding path program 10 times [2020-10-28 14:34:34,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:34,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954552429] [2020-10-28 14:34:34,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:34,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:34,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:34,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:35,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:35,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:34:35,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:35,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 962 [2020-10-28 14:34:35,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:35,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:35,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:34:35,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:35,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:34:35,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:36,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:36,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:36,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:36,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:36,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:36,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:36,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:36,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:36,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:36,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:36,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:36,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:36,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:36,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954552429] [2020-10-28 14:34:36,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:36,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:34:36,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18335867] [2020-10-28 14:34:36,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:34:36,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:36,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:34:36,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:34:36,149 INFO L87 Difference]: Start difference. First operand 102 states and 123 transitions. Second operand 15 states. [2020-10-28 14:34:36,703 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-28 14:34:37,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:37,796 INFO L93 Difference]: Finished difference Result 162 states and 199 transitions. [2020-10-28 14:34:37,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:34:37,796 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-28 14:34:37,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:37,798 INFO L225 Difference]: With dead ends: 162 [2020-10-28 14:34:37,798 INFO L226 Difference]: Without dead ends: 158 [2020-10-28 14:34:37,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:34:37,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-28 14:34:37,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 116. [2020-10-28 14:34:37,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-28 14:34:37,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 143 transitions. [2020-10-28 14:34:37,821 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 143 transitions. Word has length 35 [2020-10-28 14:34:37,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:37,821 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 143 transitions. [2020-10-28 14:34:37,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:34:37,821 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 143 transitions. [2020-10-28 14:34:37,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:34:37,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:37,822 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:37,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:34:37,822 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:37,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:37,822 INFO L82 PathProgramCache]: Analyzing trace with hash -2018485303, now seen corresponding path program 11 times [2020-10-28 14:34:37,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:37,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294758328] [2020-10-28 14:34:37,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:37,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:38,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:38,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:34:38,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:38,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-28 14:34:38,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:38,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:38,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:34:38,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:38,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:34:38,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:38,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:38,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:38,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:38,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:38,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:38,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:38,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:38,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:38,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:38,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:38,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:38,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:38,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294758328] [2020-10-28 14:34:38,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:38,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:34:38,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772659334] [2020-10-28 14:34:38,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:34:38,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:38,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:34:38,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:34:38,406 INFO L87 Difference]: Start difference. First operand 116 states and 143 transitions. Second operand 14 states. [2020-10-28 14:34:39,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:39,038 INFO L93 Difference]: Finished difference Result 159 states and 194 transitions. [2020-10-28 14:34:39,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:34:39,039 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-28 14:34:39,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:39,041 INFO L225 Difference]: With dead ends: 159 [2020-10-28 14:34:39,041 INFO L226 Difference]: Without dead ends: 143 [2020-10-28 14:34:39,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:34:39,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-28 14:34:39,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 118. [2020-10-28 14:34:39,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-28 14:34:39,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 144 transitions. [2020-10-28 14:34:39,068 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 144 transitions. Word has length 36 [2020-10-28 14:34:39,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:39,069 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 144 transitions. [2020-10-28 14:34:39,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:34:39,069 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 144 transitions. [2020-10-28 14:34:39,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:34:39,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:39,070 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:39,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 14:34:39,070 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:39,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:39,071 INFO L82 PathProgramCache]: Analyzing trace with hash -240185411, now seen corresponding path program 1 times [2020-10-28 14:34:39,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:39,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91551407] [2020-10-28 14:34:39,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:39,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:39,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:39,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:39,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:34:39,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:39,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 626 [2020-10-28 14:34:39,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:39,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:39,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:34:39,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:39,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:34:39,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:39,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:39,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:39,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:39,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:39,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:39,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:39,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:39,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:39,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:39,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:39,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:39,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:39,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 14:34:39,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91551407] [2020-10-28 14:34:39,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:39,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:34:39,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57498459] [2020-10-28 14:34:39,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:34:39,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:39,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:34:39,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:34:39,853 INFO L87 Difference]: Start difference. First operand 118 states and 144 transitions. Second operand 10 states. [2020-10-28 14:34:40,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:40,198 INFO L93 Difference]: Finished difference Result 157 states and 190 transitions. [2020-10-28 14:34:40,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:34:40,199 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-28 14:34:40,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:40,200 INFO L225 Difference]: With dead ends: 157 [2020-10-28 14:34:40,200 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 14:34:40,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:34:40,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 14:34:40,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-10-28 14:34:40,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 14:34:40,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 144 transitions. [2020-10-28 14:34:40,229 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 144 transitions. Word has length 36 [2020-10-28 14:34:40,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:40,229 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 144 transitions. [2020-10-28 14:34:40,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:34:40,229 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 144 transitions. [2020-10-28 14:34:40,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:34:40,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:40,230 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:40,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 14:34:40,230 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:40,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:40,231 INFO L82 PathProgramCache]: Analyzing trace with hash -869457591, now seen corresponding path program 12 times [2020-10-28 14:34:40,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:40,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648386748] [2020-10-28 14:34:40,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:40,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:40,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:41,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:41,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:34:41,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:41,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 771 [2020-10-28 14:34:41,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:41,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:41,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:34:41,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:41,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 14:34:41,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:41,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:41,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:41,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:41,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:41,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:41,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:41,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:41,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:41,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:41,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:41,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:41,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:41,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648386748] [2020-10-28 14:34:41,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:41,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:34:41,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565269901] [2020-10-28 14:34:41,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:34:41,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:41,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:34:41,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:34:41,468 INFO L87 Difference]: Start difference. First operand 120 states and 144 transitions. Second operand 14 states. [2020-10-28 14:34:42,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:42,276 INFO L93 Difference]: Finished difference Result 176 states and 212 transitions. [2020-10-28 14:34:42,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:34:42,277 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-28 14:34:42,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:42,278 INFO L225 Difference]: With dead ends: 176 [2020-10-28 14:34:42,279 INFO L226 Difference]: Without dead ends: 168 [2020-10-28 14:34:42,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:34:42,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-28 14:34:42,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 133. [2020-10-28 14:34:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-28 14:34:42,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 163 transitions. [2020-10-28 14:34:42,311 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 163 transitions. Word has length 36 [2020-10-28 14:34:42,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:42,312 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 163 transitions. [2020-10-28 14:34:42,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:34:42,312 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 163 transitions. [2020-10-28 14:34:42,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:34:42,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:42,313 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:42,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 14:34:42,313 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:42,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:42,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2015153631, now seen corresponding path program 10 times [2020-10-28 14:34:42,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:42,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311653546] [2020-10-28 14:34:42,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:42,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:42,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:42,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:34:42,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:42,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-28 14:34:42,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:42,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:42,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:34:42,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:42,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:34:42,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:43,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:43,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:43,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:43,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:43,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:43,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:43,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:43,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:43,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:43,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:43,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:43,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:43,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311653546] [2020-10-28 14:34:43,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:43,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:34:43,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722712988] [2020-10-28 14:34:43,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:34:43,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:43,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:34:43,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:34:43,247 INFO L87 Difference]: Start difference. First operand 133 states and 163 transitions. Second operand 15 states. [2020-10-28 14:34:45,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:45,143 INFO L93 Difference]: Finished difference Result 194 states and 237 transitions. [2020-10-28 14:34:45,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 14:34:45,144 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-28 14:34:45,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:45,145 INFO L225 Difference]: With dead ends: 194 [2020-10-28 14:34:45,146 INFO L226 Difference]: Without dead ends: 190 [2020-10-28 14:34:45,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 14:34:45,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-28 14:34:45,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 133. [2020-10-28 14:34:45,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-28 14:34:45,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 163 transitions. [2020-10-28 14:34:45,180 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 163 transitions. Word has length 36 [2020-10-28 14:34:45,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:45,181 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 163 transitions. [2020-10-28 14:34:45,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:34:45,181 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 163 transitions. [2020-10-28 14:34:45,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:34:45,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:45,182 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:45,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 14:34:45,182 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:45,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:45,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1031352680, now seen corresponding path program 13 times [2020-10-28 14:34:45,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:45,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710654464] [2020-10-28 14:34:45,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:45,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:45,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:45,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:47,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:47,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:34:47,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:34:47,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1892 [2020-10-28 14:34:47,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:47,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:47,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:34:47,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:47,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:34:47,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:47,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:47,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:47,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:47,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:47,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:47,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:47,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:47,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:47,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:47,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:47,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:47,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:47,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710654464] [2020-10-28 14:34:47,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:47,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:34:47,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988180436] [2020-10-28 14:34:47,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:34:47,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:47,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:34:47,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:34:47,430 INFO L87 Difference]: Start difference. First operand 133 states and 163 transitions. Second operand 14 states. [2020-10-28 14:34:48,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:48,480 INFO L93 Difference]: Finished difference Result 171 states and 209 transitions. [2020-10-28 14:34:48,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:34:48,481 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-28 14:34:48,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:48,482 INFO L225 Difference]: With dead ends: 171 [2020-10-28 14:34:48,482 INFO L226 Difference]: Without dead ends: 163 [2020-10-28 14:34:48,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:34:48,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-28 14:34:48,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 133. [2020-10-28 14:34:48,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-28 14:34:48,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 163 transitions. [2020-10-28 14:34:48,519 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 163 transitions. Word has length 37 [2020-10-28 14:34:48,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:48,520 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 163 transitions. [2020-10-28 14:34:48,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:34:48,520 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 163 transitions. [2020-10-28 14:34:48,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:34:48,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:48,521 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:48,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 14:34:48,521 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:48,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:48,521 INFO L82 PathProgramCache]: Analyzing trace with hash -887086202, now seen corresponding path program 11 times [2020-10-28 14:34:48,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:48,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213308978] [2020-10-28 14:34:48,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:48,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:48,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:48,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:34:48,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:48,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-28 14:34:48,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:48,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:48,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:34:48,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:48,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:34:48,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:49,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:49,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:49,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:49,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:49,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:49,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:49,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:34:49,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:49,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:49,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:49,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:49,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:49,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:49,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213308978] [2020-10-28 14:34:49,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:49,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:34:49,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957517825] [2020-10-28 14:34:49,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:34:49,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:49,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:34:49,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:34:49,255 INFO L87 Difference]: Start difference. First operand 133 states and 163 transitions. Second operand 14 states. [2020-10-28 14:34:50,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:50,821 INFO L93 Difference]: Finished difference Result 176 states and 214 transitions. [2020-10-28 14:34:50,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:34:50,822 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-28 14:34:50,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:50,823 INFO L225 Difference]: With dead ends: 176 [2020-10-28 14:34:50,824 INFO L226 Difference]: Without dead ends: 152 [2020-10-28 14:34:50,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:34:50,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-28 14:34:50,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2020-10-28 14:34:50,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-28 14:34:50,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 162 transitions. [2020-10-28 14:34:50,857 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 162 transitions. Word has length 37 [2020-10-28 14:34:50,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:50,858 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 162 transitions. [2020-10-28 14:34:50,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:34:50,858 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 162 transitions. [2020-10-28 14:34:50,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:34:50,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:50,859 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:50,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 14:34:50,859 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:50,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:50,859 INFO L82 PathProgramCache]: Analyzing trace with hash 532414076, now seen corresponding path program 1 times [2020-10-28 14:34:50,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:50,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230707459] [2020-10-28 14:34:50,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:50,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:51,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:51,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:34:51,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:51,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 374 [2020-10-28 14:34:51,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:51,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:51,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:34:51,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:51,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:34:51,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:51,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:51,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:51,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:51,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:51,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:51,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:51,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:51,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:51,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:51,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:51,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:51,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:51,692 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:51,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230707459] [2020-10-28 14:34:51,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:51,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:34:51,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869932379] [2020-10-28 14:34:51,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:34:51,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:51,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:34:51,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:34:51,693 INFO L87 Difference]: Start difference. First operand 133 states and 162 transitions. Second operand 15 states. [2020-10-28 14:34:52,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:52,797 INFO L93 Difference]: Finished difference Result 178 states and 217 transitions. [2020-10-28 14:34:52,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:34:52,798 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-28 14:34:52,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:52,799 INFO L225 Difference]: With dead ends: 178 [2020-10-28 14:34:52,799 INFO L226 Difference]: Without dead ends: 174 [2020-10-28 14:34:52,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:34:52,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-28 14:34:52,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 133. [2020-10-28 14:34:52,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-28 14:34:52,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 162 transitions. [2020-10-28 14:34:52,840 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 162 transitions. Word has length 37 [2020-10-28 14:34:52,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:52,840 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 162 transitions. [2020-10-28 14:34:52,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:34:52,840 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 162 transitions. [2020-10-28 14:34:52,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:34:52,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:52,841 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:52,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 14:34:52,841 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:52,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:52,842 INFO L82 PathProgramCache]: Analyzing trace with hash 510643060, now seen corresponding path program 6 times [2020-10-28 14:34:52,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:52,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22854680] [2020-10-28 14:34:52,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:52,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:53,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:54,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:54,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:34:54,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:54,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1605 [2020-10-28 14:34:54,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:54,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:54,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:34:54,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:54,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:34:54,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:54,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:54,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:54,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:54,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:54,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:54,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:54,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:54,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:54,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:54,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:54,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:54,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:54,814 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:54,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22854680] [2020-10-28 14:34:54,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:54,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:34:54,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119894294] [2020-10-28 14:34:54,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:34:54,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:54,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:34:54,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:34:54,816 INFO L87 Difference]: Start difference. First operand 133 states and 162 transitions. Second operand 15 states. [2020-10-28 14:34:55,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:55,999 INFO L93 Difference]: Finished difference Result 192 states and 234 transitions. [2020-10-28 14:34:55,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:34:56,000 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-28 14:34:56,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:56,001 INFO L225 Difference]: With dead ends: 192 [2020-10-28 14:34:56,001 INFO L226 Difference]: Without dead ends: 188 [2020-10-28 14:34:56,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:34:56,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-28 14:34:56,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 133. [2020-10-28 14:34:56,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-28 14:34:56,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 162 transitions. [2020-10-28 14:34:56,037 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 162 transitions. Word has length 37 [2020-10-28 14:34:56,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:56,037 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 162 transitions. [2020-10-28 14:34:56,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:34:56,038 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 162 transitions. [2020-10-28 14:34:56,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:34:56,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:56,038 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, 1, 1, 1, 1, 1] [2020-10-28 14:34:56,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 14:34:56,039 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:56,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:56,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1370890866, now seen corresponding path program 14 times [2020-10-28 14:34:56,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:56,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7102854] [2020-10-28 14:34:56,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:56,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:56,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:56,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:34:56,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:56,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 429 [2020-10-28 14:34:56,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:56,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:56,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:34:56,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:56,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 14:34:56,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:56,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:56,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:56,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:56,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:56,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:56,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:56,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:56,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:56,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:56,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:56,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:56,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:56,778 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:56,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7102854] [2020-10-28 14:34:56,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:56,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:34:56,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000689353] [2020-10-28 14:34:56,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:34:56,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:56,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:34:56,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:34:56,781 INFO L87 Difference]: Start difference. First operand 133 states and 162 transitions. Second operand 14 states. [2020-10-28 14:34:57,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:57,396 INFO L93 Difference]: Finished difference Result 157 states and 191 transitions. [2020-10-28 14:34:57,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:34:57,396 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-28 14:34:57,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:57,398 INFO L225 Difference]: With dead ends: 157 [2020-10-28 14:34:57,398 INFO L226 Difference]: Without dead ends: 139 [2020-10-28 14:34:57,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:34:57,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-28 14:34:57,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 127. [2020-10-28 14:34:57,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-28 14:34:57,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 154 transitions. [2020-10-28 14:34:57,428 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 154 transitions. Word has length 38 [2020-10-28 14:34:57,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:57,428 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 154 transitions. [2020-10-28 14:34:57,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:34:57,428 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 154 transitions. [2020-10-28 14:34:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:34:57,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:57,429 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:57,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 14:34:57,429 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:57,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:57,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1398249767, now seen corresponding path program 7 times [2020-10-28 14:34:57,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:57,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577477422] [2020-10-28 14:34:57,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:57,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:57,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:58,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:58,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:34:58,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:58,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 763 [2020-10-28 14:34:58,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:58,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:58,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:34:58,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:58,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:34:58,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:58,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:58,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:58,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:58,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:58,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:58,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:58,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:58,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:58,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:58,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:58,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:58,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:58,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577477422] [2020-10-28 14:34:58,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:58,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:34:58,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838866888] [2020-10-28 14:34:58,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:34:58,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:58,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:34:58,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:34:58,516 INFO L87 Difference]: Start difference. First operand 127 states and 154 transitions. Second operand 14 states. [2020-10-28 14:34:59,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:59,603 INFO L93 Difference]: Finished difference Result 172 states and 207 transitions. [2020-10-28 14:34:59,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:34:59,603 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-28 14:34:59,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:59,605 INFO L225 Difference]: With dead ends: 172 [2020-10-28 14:34:59,605 INFO L226 Difference]: Without dead ends: 150 [2020-10-28 14:34:59,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:34:59,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-28 14:34:59,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 127. [2020-10-28 14:34:59,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-28 14:34:59,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2020-10-28 14:34:59,640 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 38 [2020-10-28 14:34:59,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:59,640 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2020-10-28 14:34:59,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:34:59,641 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2020-10-28 14:34:59,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:34:59,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:59,641 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:59,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 14:34:59,642 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:59,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:59,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1985686802, now seen corresponding path program 1 times [2020-10-28 14:34:59,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:59,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411492124] [2020-10-28 14:34:59,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:59,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:59,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:00,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:01,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:01,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:35:01,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:35:01,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1346 [2020-10-28 14:35:01,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:01,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:01,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:35:01,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:01,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:35:01,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:01,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:01,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:01,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:01,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:01,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:01,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:35:01,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:01,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:01,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:01,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:01,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:01,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:01,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411492124] [2020-10-28 14:35:01,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:01,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:35:01,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572217757] [2020-10-28 14:35:01,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:35:01,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:01,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:35:01,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:35:01,441 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand 15 states. [2020-10-28 14:35:02,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:02,695 INFO L93 Difference]: Finished difference Result 186 states and 225 transitions. [2020-10-28 14:35:02,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:35:02,696 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-28 14:35:02,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:02,697 INFO L225 Difference]: With dead ends: 186 [2020-10-28 14:35:02,698 INFO L226 Difference]: Without dead ends: 166 [2020-10-28 14:35:02,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:35:02,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-28 14:35:02,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 131. [2020-10-28 14:35:02,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-28 14:35:02,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 156 transitions. [2020-10-28 14:35:02,724 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 156 transitions. Word has length 38 [2020-10-28 14:35:02,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:02,724 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 156 transitions. [2020-10-28 14:35:02,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:35:02,724 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 156 transitions. [2020-10-28 14:35:02,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:35:02,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:02,725 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, 1, 1, 1, 1, 1] [2020-10-28 14:35:02,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 14:35:02,725 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:02,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:02,726 INFO L82 PathProgramCache]: Analyzing trace with hash -961854706, now seen corresponding path program 15 times [2020-10-28 14:35:02,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:02,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900167020] [2020-10-28 14:35:02,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:02,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:02,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:03,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:03,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:35:03,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:35:03,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 966 [2020-10-28 14:35:03,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:03,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:03,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:35:03,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:03,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:35:03,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:04,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:04,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:04,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:04,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:04,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:04,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:04,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:04,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:04,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:04,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:04,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:04,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:04,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900167020] [2020-10-28 14:35:04,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:04,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:35:04,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544056329] [2020-10-28 14:35:04,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:35:04,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:04,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:35:04,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:35:04,122 INFO L87 Difference]: Start difference. First operand 131 states and 156 transitions. Second operand 16 states. [2020-10-28 14:35:05,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:05,140 INFO L93 Difference]: Finished difference Result 179 states and 215 transitions. [2020-10-28 14:35:05,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:35:05,141 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-28 14:35:05,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:05,142 INFO L225 Difference]: With dead ends: 179 [2020-10-28 14:35:05,142 INFO L226 Difference]: Without dead ends: 175 [2020-10-28 14:35:05,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:35:05,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-28 14:35:05,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 140. [2020-10-28 14:35:05,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-28 14:35:05,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 168 transitions. [2020-10-28 14:35:05,169 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 168 transitions. Word has length 38 [2020-10-28 14:35:05,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:05,170 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 168 transitions. [2020-10-28 14:35:05,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:35:05,170 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 168 transitions. [2020-10-28 14:35:05,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:35:05,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:05,171 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:05,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 14:35:05,171 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:05,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:05,171 INFO L82 PathProgramCache]: Analyzing trace with hash -721153938, now seen corresponding path program 2 times [2020-10-28 14:35:05,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:05,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616827597] [2020-10-28 14:35:05,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:05,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:05,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:05,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:06,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:06,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:35:06,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:35:06,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1523 [2020-10-28 14:35:06,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:06,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:06,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:35:06,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:06,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:35:06,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:07,004 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-28 14:35:07,173 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2020-10-28 14:35:07,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:07,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:07,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:07,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:07,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:07,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:07,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:35:07,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:07,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:07,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:07,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:07,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:07,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:07,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616827597] [2020-10-28 14:35:07,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:07,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:35:07,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933486411] [2020-10-28 14:35:07,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:35:07,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:07,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:35:07,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:35:07,494 INFO L87 Difference]: Start difference. First operand 140 states and 168 transitions. Second operand 16 states. [2020-10-28 14:35:08,062 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-28 14:35:09,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:09,609 INFO L93 Difference]: Finished difference Result 196 states and 239 transitions. [2020-10-28 14:35:09,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:35:09,610 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-28 14:35:09,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:09,612 INFO L225 Difference]: With dead ends: 196 [2020-10-28 14:35:09,612 INFO L226 Difference]: Without dead ends: 192 [2020-10-28 14:35:09,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:35:09,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-28 14:35:09,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 142. [2020-10-28 14:35:09,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 14:35:09,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 171 transitions. [2020-10-28 14:35:09,645 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 171 transitions. Word has length 38 [2020-10-28 14:35:09,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:09,645 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 171 transitions. [2020-10-28 14:35:09,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:35:09,646 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 171 transitions. [2020-10-28 14:35:09,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:35:09,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:09,647 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:09,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 14:35:09,647 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:09,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:09,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1223183068, now seen corresponding path program 12 times [2020-10-28 14:35:09,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:09,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664241403] [2020-10-28 14:35:09,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:09,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:10,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:10,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:35:10,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:10,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 742 [2020-10-28 14:35:10,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:10,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:10,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:35:10,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:10,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:35:10,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:10,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:10,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:10,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:10,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:10,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:10,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:10,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:10,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:10,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:10,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:10,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:10,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:10,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664241403] [2020-10-28 14:35:10,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:10,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:35:10,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816700719] [2020-10-28 14:35:10,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:35:10,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:10,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:35:10,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:35:10,939 INFO L87 Difference]: Start difference. First operand 142 states and 171 transitions. Second operand 16 states. [2020-10-28 14:35:13,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:13,087 INFO L93 Difference]: Finished difference Result 193 states and 231 transitions. [2020-10-28 14:35:13,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 14:35:13,087 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-28 14:35:13,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:13,089 INFO L225 Difference]: With dead ends: 193 [2020-10-28 14:35:13,089 INFO L226 Difference]: Without dead ends: 189 [2020-10-28 14:35:13,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:35:13,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-28 14:35:13,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 142. [2020-10-28 14:35:13,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 14:35:13,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 171 transitions. [2020-10-28 14:35:13,124 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 171 transitions. Word has length 38 [2020-10-28 14:35:13,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:13,124 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 171 transitions. [2020-10-28 14:35:13,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:35:13,124 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 171 transitions. [2020-10-28 14:35:13,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:35:13,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:13,125 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:13,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 14:35:13,125 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:13,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:13,125 INFO L82 PathProgramCache]: Analyzing trace with hash 571780590, now seen corresponding path program 3 times [2020-10-28 14:35:13,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:13,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20468786] [2020-10-28 14:35:13,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:13,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:13,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:13,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:35:13,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:13,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 669 [2020-10-28 14:35:13,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:13,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:13,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:35:13,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:13,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:35:13,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:14,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:14,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:14,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:14,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:14,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:14,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:14,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:14,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:14,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:14,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:14,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:14,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:14,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:14,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20468786] [2020-10-28 14:35:14,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:14,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:35:14,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140516703] [2020-10-28 14:35:14,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:35:14,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:14,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:35:14,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:35:14,551 INFO L87 Difference]: Start difference. First operand 142 states and 171 transitions. Second operand 16 states. [2020-10-28 14:35:15,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:15,910 INFO L93 Difference]: Finished difference Result 185 states and 220 transitions. [2020-10-28 14:35:15,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:35:15,910 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-28 14:35:15,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:15,912 INFO L225 Difference]: With dead ends: 185 [2020-10-28 14:35:15,912 INFO L226 Difference]: Without dead ends: 181 [2020-10-28 14:35:15,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:35:15,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-28 14:35:15,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 144. [2020-10-28 14:35:15,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 14:35:15,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 173 transitions. [2020-10-28 14:35:15,955 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 173 transitions. Word has length 38 [2020-10-28 14:35:15,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:15,956 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 173 transitions. [2020-10-28 14:35:15,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:35:15,956 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 173 transitions. [2020-10-28 14:35:15,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:35:15,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:15,956 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, 1, 1, 1, 1, 1] [2020-10-28 14:35:15,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 14:35:15,957 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:15,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:15,957 INFO L82 PathProgramCache]: Analyzing trace with hash 355714925, now seen corresponding path program 16 times [2020-10-28 14:35:15,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:15,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693717847] [2020-10-28 14:35:15,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:15,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:16,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:16,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:17,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:17,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:35:17,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:35:17,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1502 [2020-10-28 14:35:17,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:17,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:17,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:35:17,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:17,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:35:17,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:17,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:17,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:17,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:17,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:17,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:17,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:17,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:17,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:17,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:17,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:17,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:17,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:17,632 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 14:35:17,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693717847] [2020-10-28 14:35:17,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:17,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:35:17,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342166982] [2020-10-28 14:35:17,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:35:17,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:17,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:35:17,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:35:17,634 INFO L87 Difference]: Start difference. First operand 144 states and 173 transitions. Second operand 10 states. [2020-10-28 14:35:18,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:18,086 INFO L93 Difference]: Finished difference Result 169 states and 202 transitions. [2020-10-28 14:35:18,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:35:18,086 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-28 14:35:18,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:18,088 INFO L225 Difference]: With dead ends: 169 [2020-10-28 14:35:18,088 INFO L226 Difference]: Without dead ends: 126 [2020-10-28 14:35:18,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:35:18,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-28 14:35:18,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-10-28 14:35:18,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-28 14:35:18,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 151 transitions. [2020-10-28 14:35:18,127 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 151 transitions. Word has length 39 [2020-10-28 14:35:18,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:18,127 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 151 transitions. [2020-10-28 14:35:18,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:35:18,127 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 151 transitions. [2020-10-28 14:35:18,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:35:18,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:18,128 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:18,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-28 14:35:18,128 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:18,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:18,129 INFO L82 PathProgramCache]: Analyzing trace with hash -572837181, now seen corresponding path program 17 times [2020-10-28 14:35:18,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:18,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805920001] [2020-10-28 14:35:18,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:18,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:18,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:19,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:19,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:35:19,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:35:19,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1389 [2020-10-28 14:35:19,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:19,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:19,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:35:19,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:19,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:35:19,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:20,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:20,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:20,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:20,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:20,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:20,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:35:20,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:20,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:20,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:20,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:20,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:20,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:20,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805920001] [2020-10-28 14:35:20,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:20,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:35:20,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787557727] [2020-10-28 14:35:20,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:35:20,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:20,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:35:20,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:35:20,039 INFO L87 Difference]: Start difference. First operand 126 states and 151 transitions. Second operand 16 states. [2020-10-28 14:35:21,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:21,249 INFO L93 Difference]: Finished difference Result 159 states and 191 transitions. [2020-10-28 14:35:21,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:35:21,249 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-28 14:35:21,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:21,251 INFO L225 Difference]: With dead ends: 159 [2020-10-28 14:35:21,251 INFO L226 Difference]: Without dead ends: 155 [2020-10-28 14:35:21,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:35:21,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-28 14:35:21,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 129. [2020-10-28 14:35:21,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-28 14:35:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2020-10-28 14:35:21,279 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 39 [2020-10-28 14:35:21,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:21,280 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2020-10-28 14:35:21,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:35:21,280 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2020-10-28 14:35:21,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:35:21,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:21,280 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:21,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-28 14:35:21,280 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:21,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:21,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1803691233, now seen corresponding path program 13 times [2020-10-28 14:35:21,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:21,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069980681] [2020-10-28 14:35:21,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:21,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:21,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:21,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:21,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:35:21,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:21,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 459 [2020-10-28 14:35:21,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:21,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:21,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:35:21,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:21,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:35:21,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:22,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:22,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:22,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:22,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:22,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:22,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:22,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:22,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:22,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:22,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:22,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:22,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:22,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069980681] [2020-10-28 14:35:22,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:22,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:35:22,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135328346] [2020-10-28 14:35:22,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:35:22,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:22,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:35:22,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:35:22,415 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand 16 states. [2020-10-28 14:35:24,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:24,437 INFO L93 Difference]: Finished difference Result 174 states and 210 transitions. [2020-10-28 14:35:24,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:35:24,437 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-28 14:35:24,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:24,439 INFO L225 Difference]: With dead ends: 174 [2020-10-28 14:35:24,439 INFO L226 Difference]: Without dead ends: 170 [2020-10-28 14:35:24,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:35:24,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-28 14:35:24,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-28 14:35:24,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-28 14:35:24,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 163 transitions. [2020-10-28 14:35:24,471 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 163 transitions. Word has length 39 [2020-10-28 14:35:24,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:24,471 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 163 transitions. [2020-10-28 14:35:24,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:35:24,471 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 163 transitions. [2020-10-28 14:35:24,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:35:24,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:24,472 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:24,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-28 14:35:24,472 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:24,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:24,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1316555703, now seen corresponding path program 1 times [2020-10-28 14:35:24,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:24,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952569729] [2020-10-28 14:35:24,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:24,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:24,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:24,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:27,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:27,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:35:27,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:35:27,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3471 [2020-10-28 14:35:27,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:27,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:27,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:35:27,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:27,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:35:27,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:28,251 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-28 14:35:28,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:28,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:28,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:28,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:28,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:28,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:35:28,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:28,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:28,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:28,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:28,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:28,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 14:35:28,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952569729] [2020-10-28 14:35:28,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:28,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:35:28,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086625740] [2020-10-28 14:35:28,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:35:28,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:28,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:35:28,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:35:28,712 INFO L87 Difference]: Start difference. First operand 136 states and 163 transitions. Second operand 15 states. [2020-10-28 14:35:29,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:29,747 INFO L93 Difference]: Finished difference Result 173 states and 203 transitions. [2020-10-28 14:35:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:35:29,747 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-28 14:35:29,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:29,749 INFO L225 Difference]: With dead ends: 173 [2020-10-28 14:35:29,749 INFO L226 Difference]: Without dead ends: 169 [2020-10-28 14:35:29,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:35:29,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-28 14:35:29,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 131. [2020-10-28 14:35:29,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-28 14:35:29,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 156 transitions. [2020-10-28 14:35:29,783 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 156 transitions. Word has length 39 [2020-10-28 14:35:29,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:29,784 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 156 transitions. [2020-10-28 14:35:29,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:35:29,784 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 156 transitions. [2020-10-28 14:35:29,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:35:29,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:29,784 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:29,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-28 14:35:29,785 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:29,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:29,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1093546801, now seen corresponding path program 8 times [2020-10-28 14:35:29,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:29,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061047588] [2020-10-28 14:35:29,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:29,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:30,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:31,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:31,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:35:31,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:35:31,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1559 [2020-10-28 14:35:31,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:31,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:31,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:35:31,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:31,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:35:31,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:31,818 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 63 [2020-10-28 14:35:31,999 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 68 [2020-10-28 14:35:32,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:32,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:32,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:32,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:32,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:32,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:35:32,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:32,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:32,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:32,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:32,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:32,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:32,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061047588] [2020-10-28 14:35:32,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:32,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:35:32,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246108995] [2020-10-28 14:35:32,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:35:32,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:32,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:35:32,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:35:32,409 INFO L87 Difference]: Start difference. First operand 131 states and 156 transitions. Second operand 17 states. [2020-10-28 14:35:34,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:34,025 INFO L93 Difference]: Finished difference Result 169 states and 198 transitions. [2020-10-28 14:35:34,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:35:34,025 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-28 14:35:34,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:34,027 INFO L225 Difference]: With dead ends: 169 [2020-10-28 14:35:34,027 INFO L226 Difference]: Without dead ends: 165 [2020-10-28 14:35:34,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:35:34,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-28 14:35:34,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 129. [2020-10-28 14:35:34,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-28 14:35:34,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 155 transitions. [2020-10-28 14:35:34,061 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 155 transitions. Word has length 39 [2020-10-28 14:35:34,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:34,061 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 155 transitions. [2020-10-28 14:35:34,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:35:34,062 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 155 transitions. [2020-10-28 14:35:34,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:35:34,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:34,062 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:34,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-28 14:35:34,062 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:34,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:34,063 INFO L82 PathProgramCache]: Analyzing trace with hash 83697523, now seen corresponding path program 4 times [2020-10-28 14:35:34,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:34,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005630246] [2020-10-28 14:35:34,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:34,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:34,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:34,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:35:34,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:34,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-28 14:35:34,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:34,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:34,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:35:34,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:34,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:35:34,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:34,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:34,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:34,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:34,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:34,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:34,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:34,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:34,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:34,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:34,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:34,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:34,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 14:35:34,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005630246] [2020-10-28 14:35:34,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:34,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:35:34,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905464022] [2020-10-28 14:35:34,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:35:34,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:34,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:35:34,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:35:34,682 INFO L87 Difference]: Start difference. First operand 129 states and 155 transitions. Second operand 13 states. [2020-10-28 14:35:35,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:35,325 INFO L93 Difference]: Finished difference Result 185 states and 217 transitions. [2020-10-28 14:35:35,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:35:35,325 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-28 14:35:35,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:35,327 INFO L225 Difference]: With dead ends: 185 [2020-10-28 14:35:35,327 INFO L226 Difference]: Without dead ends: 160 [2020-10-28 14:35:35,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:35:35,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-28 14:35:35,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 127. [2020-10-28 14:35:35,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-28 14:35:35,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 152 transitions. [2020-10-28 14:35:35,372 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 152 transitions. Word has length 40 [2020-10-28 14:35:35,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:35,373 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 152 transitions. [2020-10-28 14:35:35,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:35:35,373 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 152 transitions. [2020-10-28 14:35:35,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:35:35,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:35,374 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:35,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-28 14:35:35,374 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:35,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:35,374 INFO L82 PathProgramCache]: Analyzing trace with hash 438830995, now seen corresponding path program 18 times [2020-10-28 14:35:35,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:35,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276769274] [2020-10-28 14:35:35,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:35,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:35,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:35,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:36,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:40,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:40,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:35:40,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:35:40,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 14:35:40,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:40,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:40,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:35:40,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:40,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:35:40,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:40,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:40,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:40,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:40,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:40,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:40,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:35:40,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:40,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:40,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:40,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:40,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:40,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:40,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276769274] [2020-10-28 14:35:40,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:40,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:35:40,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768275875] [2020-10-28 14:35:40,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:35:40,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:40,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:35:40,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:35:40,824 INFO L87 Difference]: Start difference. First operand 127 states and 152 transitions. Second operand 16 states. [2020-10-28 14:35:41,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:41,975 INFO L93 Difference]: Finished difference Result 170 states and 204 transitions. [2020-10-28 14:35:41,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:35:41,976 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-28 14:35:41,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:41,977 INFO L225 Difference]: With dead ends: 170 [2020-10-28 14:35:41,977 INFO L226 Difference]: Without dead ends: 150 [2020-10-28 14:35:41,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:35:41,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-28 14:35:42,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 129. [2020-10-28 14:35:42,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-28 14:35:42,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 153 transitions. [2020-10-28 14:35:42,015 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 153 transitions. Word has length 40 [2020-10-28 14:35:42,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:42,015 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 153 transitions. [2020-10-28 14:35:42,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:35:42,015 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 153 transitions. [2020-10-28 14:35:42,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:35:42,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:42,015 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:42,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-28 14:35:42,016 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:42,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:42,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1086995668, now seen corresponding path program 9 times [2020-10-28 14:35:42,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:42,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674418864] [2020-10-28 14:35:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:42,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:42,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:43,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:43,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:35:43,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:35:43,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1175 [2020-10-28 14:35:43,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:43,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:43,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:35:43,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:43,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:35:43,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:43,636 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-28 14:35:44,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:44,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:44,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:44,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:44,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:44,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:44,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:44,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:44,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:44,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:44,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:44,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:44,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674418864] [2020-10-28 14:35:44,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:44,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:35:44,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149755468] [2020-10-28 14:35:44,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:35:44,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:44,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:35:44,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:35:44,139 INFO L87 Difference]: Start difference. First operand 129 states and 153 transitions. Second operand 17 states. [2020-10-28 14:35:46,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:46,133 INFO L93 Difference]: Finished difference Result 206 states and 250 transitions. [2020-10-28 14:35:46,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:35:46,133 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-28 14:35:46,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:46,135 INFO L225 Difference]: With dead ends: 206 [2020-10-28 14:35:46,135 INFO L226 Difference]: Without dead ends: 202 [2020-10-28 14:35:46,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 14:35:46,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-28 14:35:46,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 144. [2020-10-28 14:35:46,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 14:35:46,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 174 transitions. [2020-10-28 14:35:46,174 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 174 transitions. Word has length 40 [2020-10-28 14:35:46,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:46,174 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 174 transitions. [2020-10-28 14:35:46,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:35:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 174 transitions. [2020-10-28 14:35:46,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:35:46,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:46,175 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:46,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-28 14:35:46,176 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:46,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:46,176 INFO L82 PathProgramCache]: Analyzing trace with hash 847867155, now seen corresponding path program 19 times [2020-10-28 14:35:46,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:46,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843902753] [2020-10-28 14:35:46,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:46,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:46,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:47,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:47,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:35:47,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:35:47,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1352 [2020-10-28 14:35:47,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:47,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:47,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:35:47,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:47,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:35:47,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:48,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:48,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:48,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:48,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:48,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:48,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:48,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:48,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:48,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:48,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:48,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:48,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:48,044 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:48,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843902753] [2020-10-28 14:35:48,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:48,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:35:48,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974189258] [2020-10-28 14:35:48,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:35:48,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:48,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:35:48,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:35:48,046 INFO L87 Difference]: Start difference. First operand 144 states and 174 transitions. Second operand 17 states. [2020-10-28 14:35:49,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:49,154 INFO L93 Difference]: Finished difference Result 192 states and 230 transitions. [2020-10-28 14:35:49,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:35:49,154 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-28 14:35:49,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:49,156 INFO L225 Difference]: With dead ends: 192 [2020-10-28 14:35:49,156 INFO L226 Difference]: Without dead ends: 188 [2020-10-28 14:35:49,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:35:49,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-28 14:35:49,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 146. [2020-10-28 14:35:49,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-28 14:35:49,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 176 transitions. [2020-10-28 14:35:49,214 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 176 transitions. Word has length 40 [2020-10-28 14:35:49,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:49,215 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 176 transitions. [2020-10-28 14:35:49,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:35:49,215 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 176 transitions. [2020-10-28 14:35:49,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:35:49,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:49,216 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:49,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-28 14:35:49,216 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:49,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:49,216 INFO L82 PathProgramCache]: Analyzing trace with hash 622517768, now seen corresponding path program 20 times [2020-10-28 14:35:49,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:49,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809434687] [2020-10-28 14:35:49,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:49,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:49,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:49,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:35:49,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:49,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 472 [2020-10-28 14:35:49,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:49,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:49,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:35:49,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:49,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:35:49,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:50,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:50,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:50,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:50,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:50,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:50,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:35:50,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:50,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:50,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:50,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:50,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:50,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:50,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809434687] [2020-10-28 14:35:50,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:50,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:35:50,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976045559] [2020-10-28 14:35:50,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:35:50,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:50,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:35:50,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:35:50,274 INFO L87 Difference]: Start difference. First operand 146 states and 176 transitions. Second operand 16 states. [2020-10-28 14:35:51,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:51,517 INFO L93 Difference]: Finished difference Result 193 states and 231 transitions. [2020-10-28 14:35:51,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:35:51,518 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-28 14:35:51,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:51,519 INFO L225 Difference]: With dead ends: 193 [2020-10-28 14:35:51,519 INFO L226 Difference]: Without dead ends: 185 [2020-10-28 14:35:51,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:35:51,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-28 14:35:51,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 148. [2020-10-28 14:35:51,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-28 14:35:51,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 179 transitions. [2020-10-28 14:35:51,581 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 179 transitions. Word has length 41 [2020-10-28 14:35:51,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:51,581 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 179 transitions. [2020-10-28 14:35:51,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:35:51,582 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 179 transitions. [2020-10-28 14:35:51,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:35:51,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:51,584 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:51,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-28 14:35:51,584 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:51,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:51,585 INFO L82 PathProgramCache]: Analyzing trace with hash -306034338, now seen corresponding path program 21 times [2020-10-28 14:35:51,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:51,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883752666] [2020-10-28 14:35:51,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:51,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:51,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:52,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:54,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:54,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:35:54,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:35:54,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3070 [2020-10-28 14:35:54,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:54,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:54,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:35:54,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:54,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:35:54,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:55,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:55,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:55,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:55,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:55,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:55,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:55,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:55,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:55,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:55,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:55,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:55,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:55,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883752666] [2020-10-28 14:35:55,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:55,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:35:55,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718094876] [2020-10-28 14:35:55,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:35:55,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:55,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:35:55,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:35:55,200 INFO L87 Difference]: Start difference. First operand 148 states and 179 transitions. Second operand 17 states. [2020-10-28 14:35:56,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:56,477 INFO L93 Difference]: Finished difference Result 219 states and 262 transitions. [2020-10-28 14:35:56,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:35:56,481 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-28 14:35:56,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:56,482 INFO L225 Difference]: With dead ends: 219 [2020-10-28 14:35:56,482 INFO L226 Difference]: Without dead ends: 215 [2020-10-28 14:35:56,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:35:56,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-28 14:35:56,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 162. [2020-10-28 14:35:56,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-28 14:35:56,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 199 transitions. [2020-10-28 14:35:56,558 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 199 transitions. Word has length 41 [2020-10-28 14:35:56,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:56,558 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 199 transitions. [2020-10-28 14:35:56,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:35:56,558 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 199 transitions. [2020-10-28 14:35:56,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:35:56,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:56,559 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:56,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-28 14:35:56,560 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:56,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:56,560 INFO L82 PathProgramCache]: Analyzing trace with hash 2070494076, now seen corresponding path program 14 times [2020-10-28 14:35:56,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:56,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444049463] [2020-10-28 14:35:56,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:56,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:57,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:57,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:35:57,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:57,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 669 [2020-10-28 14:35:57,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:57,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:57,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:35:57,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:57,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:35:57,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:57,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:57,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:57,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:57,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:57,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:57,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:35:57,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:57,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:57,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:57,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:57,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:57,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:57,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444049463] [2020-10-28 14:35:57,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:57,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:35:57,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800549916] [2020-10-28 14:35:57,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:35:57,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:57,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:35:57,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:35:57,908 INFO L87 Difference]: Start difference. First operand 162 states and 199 transitions. Second operand 17 states. [2020-10-28 14:36:01,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:01,424 INFO L93 Difference]: Finished difference Result 240 states and 294 transitions. [2020-10-28 14:36:01,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 14:36:01,425 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-28 14:36:01,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:01,426 INFO L225 Difference]: With dead ends: 240 [2020-10-28 14:36:01,426 INFO L226 Difference]: Without dead ends: 236 [2020-10-28 14:36:01,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 14:36:01,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-28 14:36:01,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 166. [2020-10-28 14:36:01,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-28 14:36:01,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 205 transitions. [2020-10-28 14:36:01,488 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 205 transitions. Word has length 41 [2020-10-28 14:36:01,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:01,488 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 205 transitions. [2020-10-28 14:36:01,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:36:01,489 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 205 transitions. [2020-10-28 14:36:01,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:36:01,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:01,490 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:01,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-28 14:36:01,490 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:01,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:01,490 INFO L82 PathProgramCache]: Analyzing trace with hash -804972942, now seen corresponding path program 2 times [2020-10-28 14:36:01,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:01,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028521808] [2020-10-28 14:36:01,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:01,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:02,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:02,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:36:02,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:02,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 723 [2020-10-28 14:36:02,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:02,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:02,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:36:02,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:02,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:36:02,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:02,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:02,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:02,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:02,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:02,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:02,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:02,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:36:02,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:02,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:02,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:02,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:02,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:02,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:02,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028521808] [2020-10-28 14:36:02,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:02,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:36:02,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756132227] [2020-10-28 14:36:02,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:36:02,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:02,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:36:02,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:36:02,742 INFO L87 Difference]: Start difference. First operand 166 states and 205 transitions. Second operand 17 states. [2020-10-28 14:36:04,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:04,007 INFO L93 Difference]: Finished difference Result 206 states and 246 transitions. [2020-10-28 14:36:04,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:36:04,008 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-28 14:36:04,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:04,009 INFO L225 Difference]: With dead ends: 206 [2020-10-28 14:36:04,010 INFO L226 Difference]: Without dead ends: 202 [2020-10-28 14:36:04,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:36:04,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-28 14:36:04,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-10-28 14:36:04,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-28 14:36:04,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 203 transitions. [2020-10-28 14:36:04,084 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 203 transitions. Word has length 41 [2020-10-28 14:36:04,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:04,085 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 203 transitions. [2020-10-28 14:36:04,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:36:04,085 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 203 transitions. [2020-10-28 14:36:04,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:36:04,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:04,086 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:04,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-28 14:36:04,086 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:04,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:04,087 INFO L82 PathProgramCache]: Analyzing trace with hash -2121941288, now seen corresponding path program 22 times [2020-10-28 14:36:04,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:04,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698275057] [2020-10-28 14:36:04,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:04,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:04,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:05,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:05,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:36:05,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:36:05,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1010 [2020-10-28 14:36:05,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:05,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:05,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:36:05,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:05,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:36:05,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:05,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:05,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:05,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:05,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:05,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:05,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:36:05,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:05,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:05,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:05,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:05,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:05,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:36:05,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698275057] [2020-10-28 14:36:05,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:05,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:36:05,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054792674] [2020-10-28 14:36:05,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:36:05,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:05,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:36:05,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:36:05,608 INFO L87 Difference]: Start difference. First operand 164 states and 203 transitions. Second operand 15 states. [2020-10-28 14:36:06,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:06,405 INFO L93 Difference]: Finished difference Result 184 states and 226 transitions. [2020-10-28 14:36:06,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:36:06,405 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-28 14:36:06,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:06,407 INFO L225 Difference]: With dead ends: 184 [2020-10-28 14:36:06,407 INFO L226 Difference]: Without dead ends: 164 [2020-10-28 14:36:06,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:36:06,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-28 14:36:06,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 156. [2020-10-28 14:36:06,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-28 14:36:06,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 193 transitions. [2020-10-28 14:36:06,453 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 193 transitions. Word has length 42 [2020-10-28 14:36:06,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:06,453 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 193 transitions. [2020-10-28 14:36:06,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:36:06,453 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 193 transitions. [2020-10-28 14:36:06,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:36:06,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:06,454 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:06,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-28 14:36:06,454 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:06,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:06,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1927341437, now seen corresponding path program 2 times [2020-10-28 14:36:06,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:06,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790329911] [2020-10-28 14:36:06,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:06,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:06,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:06,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:36:06,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:06,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 495 [2020-10-28 14:36:06,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:06,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:06,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:36:06,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:06,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:36:06,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:07,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:07,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:07,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:07,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:07,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:07,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:07,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:07,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:07,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:07,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:07,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:07,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:36:07,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790329911] [2020-10-28 14:36:07,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:07,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:36:07,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812371497] [2020-10-28 14:36:07,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:36:07,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:07,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:36:07,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:36:07,408 INFO L87 Difference]: Start difference. First operand 156 states and 193 transitions. Second operand 15 states. [2020-10-28 14:36:08,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:08,360 INFO L93 Difference]: Finished difference Result 192 states and 233 transitions. [2020-10-28 14:36:08,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:36:08,361 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-28 14:36:08,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:08,362 INFO L225 Difference]: With dead ends: 192 [2020-10-28 14:36:08,362 INFO L226 Difference]: Without dead ends: 182 [2020-10-28 14:36:08,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:36:08,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-28 14:36:08,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 156. [2020-10-28 14:36:08,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-28 14:36:08,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 192 transitions. [2020-10-28 14:36:08,434 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 192 transitions. Word has length 42 [2020-10-28 14:36:08,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:08,434 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 192 transitions. [2020-10-28 14:36:08,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:36:08,434 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 192 transitions. [2020-10-28 14:36:08,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:36:08,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:08,435 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:08,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-28 14:36:08,436 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:08,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:08,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1298069257, now seen corresponding path program 23 times [2020-10-28 14:36:08,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:08,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290368467] [2020-10-28 14:36:08,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:08,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:08,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:09,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:11,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:11,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:36:11,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:36:11,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3101 [2020-10-28 14:36:11,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:11,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:11,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:36:11,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:11,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:36:11,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:11,915 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 54 [2020-10-28 14:36:12,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:12,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:12,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:12,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:12,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:12,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:12,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:12,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:12,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:12,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:12,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:12,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:12,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290368467] [2020-10-28 14:36:12,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:12,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:36:12,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817952024] [2020-10-28 14:36:12,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:36:12,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:12,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:36:12,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:36:12,427 INFO L87 Difference]: Start difference. First operand 156 states and 192 transitions. Second operand 17 states. [2020-10-28 14:36:13,015 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-28 14:36:14,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:14,407 INFO L93 Difference]: Finished difference Result 200 states and 245 transitions. [2020-10-28 14:36:14,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:36:14,408 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-28 14:36:14,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:14,410 INFO L225 Difference]: With dead ends: 200 [2020-10-28 14:36:14,410 INFO L226 Difference]: Without dead ends: 196 [2020-10-28 14:36:14,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:36:14,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-28 14:36:14,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 156. [2020-10-28 14:36:14,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-28 14:36:14,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 192 transitions. [2020-10-28 14:36:14,466 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 192 transitions. Word has length 42 [2020-10-28 14:36:14,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:14,466 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 192 transitions. [2020-10-28 14:36:14,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:36:14,467 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 192 transitions. [2020-10-28 14:36:14,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:36:14,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:14,468 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:14,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-28 14:36:14,468 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:14,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:14,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1450551649, now seen corresponding path program 15 times [2020-10-28 14:36:14,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:14,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456107480] [2020-10-28 14:36:14,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:14,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:14,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:14,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:36:14,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:14,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 467 [2020-10-28 14:36:14,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:14,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:14,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:36:14,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:14,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:36:14,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:15,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:15,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:15,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:15,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:15,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:15,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:15,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:15,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:15,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:15,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:15,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:15,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:15,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456107480] [2020-10-28 14:36:15,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:15,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:36:15,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391978663] [2020-10-28 14:36:15,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:36:15,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:15,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:36:15,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:36:15,714 INFO L87 Difference]: Start difference. First operand 156 states and 192 transitions. Second operand 16 states. [2020-10-28 14:36:18,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:18,145 INFO L93 Difference]: Finished difference Result 199 states and 241 transitions. [2020-10-28 14:36:18,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 14:36:18,146 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-28 14:36:18,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:18,148 INFO L225 Difference]: With dead ends: 199 [2020-10-28 14:36:18,149 INFO L226 Difference]: Without dead ends: 172 [2020-10-28 14:36:18,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 14:36:18,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-28 14:36:18,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 156. [2020-10-28 14:36:18,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-28 14:36:18,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 191 transitions. [2020-10-28 14:36:18,205 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 191 transitions. Word has length 42 [2020-10-28 14:36:18,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:18,205 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 191 transitions. [2020-10-28 14:36:18,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:36:18,205 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 191 transitions. [2020-10-28 14:36:18,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:36:18,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:18,206 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:18,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-28 14:36:18,206 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:18,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:18,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1365766167, now seen corresponding path program 3 times [2020-10-28 14:36:18,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:18,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801282686] [2020-10-28 14:36:18,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:18,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:18,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:18,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:36:18,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:18,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 685 [2020-10-28 14:36:18,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:18,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:18,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:36:18,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:18,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:36:18,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:19,129 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-28 14:36:19,246 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-28 14:36:19,473 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2020-10-28 14:36:19,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:19,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:19,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:19,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:19,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:19,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:19,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:19,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:19,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:19,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:19,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:19,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:19,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801282686] [2020-10-28 14:36:19,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:19,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:36:19,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176367047] [2020-10-28 14:36:19,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:36:19,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:19,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:36:19,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:36:19,732 INFO L87 Difference]: Start difference. First operand 156 states and 191 transitions. Second operand 17 states. [2020-10-28 14:36:21,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:21,217 INFO L93 Difference]: Finished difference Result 196 states and 234 transitions. [2020-10-28 14:36:21,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:36:21,218 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-28 14:36:21,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:21,219 INFO L225 Difference]: With dead ends: 196 [2020-10-28 14:36:21,220 INFO L226 Difference]: Without dead ends: 192 [2020-10-28 14:36:21,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:36:21,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-28 14:36:21,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 156. [2020-10-28 14:36:21,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-28 14:36:21,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 191 transitions. [2020-10-28 14:36:21,274 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 191 transitions. Word has length 42 [2020-10-28 14:36:21,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:21,275 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 191 transitions. [2020-10-28 14:36:21,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:36:21,275 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 191 transitions. [2020-10-28 14:36:21,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:36:21,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:21,276 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:21,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-28 14:36:21,276 INFO L429 AbstractCegarLoop]: === Iteration 72 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:21,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:21,276 INFO L82 PathProgramCache]: Analyzing trace with hash 119784536, now seen corresponding path program 24 times [2020-10-28 14:36:21,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:21,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273227259] [2020-10-28 14:36:21,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:21,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:21,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:21,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:22,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:24,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:24,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:36:24,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:36:24,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3133 [2020-10-28 14:36:24,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:24,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:24,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:36:24,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:24,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:36:24,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:25,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:25,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:25,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:25,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:25,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:25,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:36:25,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:25,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:25,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:25,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:25,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:25,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:25,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273227259] [2020-10-28 14:36:25,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:25,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:36:25,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975628920] [2020-10-28 14:36:25,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:36:25,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:25,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:36:25,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:36:25,220 INFO L87 Difference]: Start difference. First operand 156 states and 191 transitions. Second operand 18 states. [2020-10-28 14:36:26,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:26,876 INFO L93 Difference]: Finished difference Result 202 states and 244 transitions. [2020-10-28 14:36:26,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:36:26,876 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-28 14:36:26,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:26,879 INFO L225 Difference]: With dead ends: 202 [2020-10-28 14:36:26,879 INFO L226 Difference]: Without dead ends: 198 [2020-10-28 14:36:26,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:36:26,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-28 14:36:26,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 158. [2020-10-28 14:36:26,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-28 14:36:26,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 194 transitions. [2020-10-28 14:36:26,956 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 194 transitions. Word has length 42 [2020-10-28 14:36:26,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:26,956 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 194 transitions. [2020-10-28 14:36:26,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:36:26,956 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 194 transitions. [2020-10-28 14:36:26,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:36:26,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:26,957 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:26,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-28 14:36:26,958 INFO L429 AbstractCegarLoop]: === Iteration 73 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:26,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:26,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1406042127, now seen corresponding path program 10 times [2020-10-28 14:36:26,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:26,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517729008] [2020-10-28 14:36:26,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:27,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:27,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:28,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:28,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:36:28,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:36:28,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1700 [2020-10-28 14:36:28,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:28,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:28,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:36:28,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:28,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:36:28,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:29,076 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-28 14:36:29,247 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-28 14:36:29,410 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-10-28 14:36:29,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:29,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:29,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:29,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:29,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:29,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:29,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:29,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:29,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:29,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:29,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:29,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:29,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517729008] [2020-10-28 14:36:29,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:29,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:36:29,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681746162] [2020-10-28 14:36:29,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:36:29,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:29,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:36:29,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:36:29,963 INFO L87 Difference]: Start difference. First operand 158 states and 194 transitions. Second operand 18 states. [2020-10-28 14:36:32,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:32,263 INFO L93 Difference]: Finished difference Result 267 states and 326 transitions. [2020-10-28 14:36:32,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:36:32,263 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-28 14:36:32,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:32,265 INFO L225 Difference]: With dead ends: 267 [2020-10-28 14:36:32,265 INFO L226 Difference]: Without dead ends: 263 [2020-10-28 14:36:32,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=184, Invalid=1076, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:36:32,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-28 14:36:32,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 175. [2020-10-28 14:36:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-28 14:36:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 217 transitions. [2020-10-28 14:36:32,322 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 217 transitions. Word has length 42 [2020-10-28 14:36:32,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:32,322 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 217 transitions. [2020-10-28 14:36:32,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:36:32,322 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 217 transitions. [2020-10-28 14:36:32,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:36:32,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:32,323 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:32,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-28 14:36:32,324 INFO L429 AbstractCegarLoop]: === Iteration 74 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:32,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:32,324 INFO L82 PathProgramCache]: Analyzing trace with hash 528820696, now seen corresponding path program 25 times [2020-10-28 14:36:32,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:32,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644052188] [2020-10-28 14:36:32,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:32,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:32,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:32,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:33,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:33,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:36:33,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:36:33,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1451 [2020-10-28 14:36:33,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:33,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:33,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:36:33,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:33,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:36:33,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:34,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:34,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:34,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:34,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:34,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:34,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:34,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:34,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:34,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:34,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:34,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:34,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:34,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644052188] [2020-10-28 14:36:34,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:34,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:36:34,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107222408] [2020-10-28 14:36:34,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:36:34,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:34,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:36:34,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:36:34,420 INFO L87 Difference]: Start difference. First operand 175 states and 217 transitions. Second operand 18 states. [2020-10-28 14:36:35,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:35,842 INFO L93 Difference]: Finished difference Result 230 states and 279 transitions. [2020-10-28 14:36:35,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:36:35,843 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-28 14:36:35,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:35,845 INFO L225 Difference]: With dead ends: 230 [2020-10-28 14:36:35,845 INFO L226 Difference]: Without dead ends: 226 [2020-10-28 14:36:35,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:36:35,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-28 14:36:35,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 177. [2020-10-28 14:36:35,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-28 14:36:35,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 219 transitions. [2020-10-28 14:36:35,909 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 219 transitions. Word has length 42 [2020-10-28 14:36:35,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:35,909 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 219 transitions. [2020-10-28 14:36:35,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:36:35,909 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 219 transitions. [2020-10-28 14:36:35,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:36:35,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:35,910 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:35,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-28 14:36:35,910 INFO L429 AbstractCegarLoop]: === Iteration 75 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:35,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:35,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1692611571, now seen corresponding path program 26 times [2020-10-28 14:36:35,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:35,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11969068] [2020-10-28 14:36:35,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:35,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:35,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:36,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:36,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:36:36,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:36,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 627 [2020-10-28 14:36:36,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:36,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:36,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:36:36,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:36,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:36:36,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:36,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:36,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:36,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:36,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:36,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:36,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:36,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:36,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:36,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:36,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:36,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:36,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:36,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:36,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11969068] [2020-10-28 14:36:36,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:36,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:36:36,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337447795] [2020-10-28 14:36:36,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:36:36,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:36,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:36:36,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:36:36,986 INFO L87 Difference]: Start difference. First operand 177 states and 219 transitions. Second operand 17 states. [2020-10-28 14:36:38,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:38,104 INFO L93 Difference]: Finished difference Result 221 states and 271 transitions. [2020-10-28 14:36:38,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:36:38,105 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-10-28 14:36:38,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:38,107 INFO L225 Difference]: With dead ends: 221 [2020-10-28 14:36:38,107 INFO L226 Difference]: Without dead ends: 202 [2020-10-28 14:36:38,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:36:38,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-28 14:36:38,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 179. [2020-10-28 14:36:38,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-28 14:36:38,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 220 transitions. [2020-10-28 14:36:38,167 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 220 transitions. Word has length 43 [2020-10-28 14:36:38,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:38,167 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 220 transitions. [2020-10-28 14:36:38,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:36:38,167 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 220 transitions. [2020-10-28 14:36:38,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:36:38,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:38,169 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:38,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-28 14:36:38,170 INFO L429 AbstractCegarLoop]: === Iteration 76 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:38,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:38,170 INFO L82 PathProgramCache]: Analyzing trace with hash 485232756, now seen corresponding path program 11 times [2020-10-28 14:36:38,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:38,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933788332] [2020-10-28 14:36:38,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:38,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:38,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:39,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:39,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:36:39,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:36:39,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1257 [2020-10-28 14:36:39,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:39,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:39,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:36:39,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:39,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:36:39,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:39,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:39,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:39,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:39,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:39,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:39,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:39,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:39,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:39,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:39,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:39,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:39,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:39,973 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:39,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933788332] [2020-10-28 14:36:39,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:39,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:36:39,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963373566] [2020-10-28 14:36:39,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:36:39,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:39,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:36:39,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:36:39,975 INFO L87 Difference]: Start difference. First operand 179 states and 220 transitions. Second operand 16 states. [2020-10-28 14:36:41,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:41,788 INFO L93 Difference]: Finished difference Result 231 states and 282 transitions. [2020-10-28 14:36:41,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:36:41,789 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-28 14:36:41,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:41,791 INFO L225 Difference]: With dead ends: 231 [2020-10-28 14:36:41,791 INFO L226 Difference]: Without dead ends: 206 [2020-10-28 14:36:41,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:36:41,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-28 14:36:41,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 179. [2020-10-28 14:36:41,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-28 14:36:41,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 219 transitions. [2020-10-28 14:36:41,881 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 219 transitions. Word has length 43 [2020-10-28 14:36:41,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:41,881 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 219 transitions. [2020-10-28 14:36:41,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:36:41,882 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 219 transitions. [2020-10-28 14:36:41,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:36:41,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:41,883 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:41,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-28 14:36:41,883 INFO L429 AbstractCegarLoop]: === Iteration 77 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:41,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:41,883 INFO L82 PathProgramCache]: Analyzing trace with hash -677987869, now seen corresponding path program 27 times [2020-10-28 14:36:41,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:41,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141653844] [2020-10-28 14:36:41,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:41,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:42,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:43,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:43,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:36:43,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:36:43,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1546 [2020-10-28 14:36:43,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:43,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:43,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:36:43,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:43,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:36:43,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:43,880 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2020-10-28 14:36:44,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:44,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:44,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:44,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:44,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:44,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:36:44,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:44,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:44,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:44,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:44,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:44,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:44,205 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:44,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141653844] [2020-10-28 14:36:44,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:44,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:36:44,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736828532] [2020-10-28 14:36:44,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:36:44,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:44,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:36:44,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:36:44,207 INFO L87 Difference]: Start difference. First operand 179 states and 219 transitions. Second operand 17 states. [2020-10-28 14:36:45,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:45,579 INFO L93 Difference]: Finished difference Result 241 states and 290 transitions. [2020-10-28 14:36:45,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:36:45,580 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-10-28 14:36:45,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:45,581 INFO L225 Difference]: With dead ends: 241 [2020-10-28 14:36:45,581 INFO L226 Difference]: Without dead ends: 233 [2020-10-28 14:36:45,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:36:45,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-28 14:36:45,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 188. [2020-10-28 14:36:45,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-28 14:36:45,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 232 transitions. [2020-10-28 14:36:45,663 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 232 transitions. Word has length 43 [2020-10-28 14:36:45,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:45,663 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 232 transitions. [2020-10-28 14:36:45,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:36:45,663 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 232 transitions. [2020-10-28 14:36:45,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:36:45,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:45,664 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:45,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-28 14:36:45,664 INFO L429 AbstractCegarLoop]: === Iteration 78 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:45,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:45,664 INFO L82 PathProgramCache]: Analyzing trace with hash 769988439, now seen corresponding path program 16 times [2020-10-28 14:36:45,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:45,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844175024] [2020-10-28 14:36:45,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:45,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:46,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:46,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:36:46,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:46,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 797 [2020-10-28 14:36:46,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:46,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:46,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:36:46,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:46,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 14:36:46,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:47,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:47,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:47,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:47,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:47,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:47,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:47,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:47,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:47,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:47,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:47,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:47,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:47,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:47,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844175024] [2020-10-28 14:36:47,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:47,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:36:47,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297353194] [2020-10-28 14:36:47,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:36:47,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:47,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:36:47,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:36:47,203 INFO L87 Difference]: Start difference. First operand 188 states and 232 transitions. Second operand 18 states. [2020-10-28 14:36:50,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:50,498 INFO L93 Difference]: Finished difference Result 258 states and 319 transitions. [2020-10-28 14:36:50,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 14:36:50,499 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-10-28 14:36:50,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:50,502 INFO L225 Difference]: With dead ends: 258 [2020-10-28 14:36:50,502 INFO L226 Difference]: Without dead ends: 254 [2020-10-28 14:36:50,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=180, Invalid=1542, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 14:36:50,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-28 14:36:50,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 188. [2020-10-28 14:36:50,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-28 14:36:50,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 232 transitions. [2020-10-28 14:36:50,582 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 232 transitions. Word has length 43 [2020-10-28 14:36:50,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:50,583 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 232 transitions. [2020-10-28 14:36:50,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:36:50,583 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 232 transitions. [2020-10-28 14:36:50,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:36:50,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:50,583 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:50,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-28 14:36:50,584 INFO L429 AbstractCegarLoop]: === Iteration 79 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:50,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:50,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1027692338, now seen corresponding path program 28 times [2020-10-28 14:36:50,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:50,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833117504] [2020-10-28 14:36:50,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:50,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:50,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:51,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:54,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:54,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:36:54,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:36:54,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3601 [2020-10-28 14:36:54,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:54,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:54,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:36:54,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:54,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:36:54,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:55,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:55,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:55,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:55,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:55,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:55,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:55,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:55,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:55,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:55,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:55,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:55,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:55,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833117504] [2020-10-28 14:36:55,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:55,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:36:55,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569139481] [2020-10-28 14:36:55,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:36:55,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:55,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:36:55,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:36:55,089 INFO L87 Difference]: Start difference. First operand 188 states and 232 transitions. Second operand 18 states. [2020-10-28 14:36:55,488 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-10-28 14:36:57,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:57,169 INFO L93 Difference]: Finished difference Result 227 states and 278 transitions. [2020-10-28 14:36:57,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:36:57,170 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-28 14:36:57,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:57,172 INFO L225 Difference]: With dead ends: 227 [2020-10-28 14:36:57,172 INFO L226 Difference]: Without dead ends: 223 [2020-10-28 14:36:57,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:36:57,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-28 14:36:57,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 188. [2020-10-28 14:36:57,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-28 14:36:57,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 232 transitions. [2020-10-28 14:36:57,241 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 232 transitions. Word has length 44 [2020-10-28 14:36:57,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:57,241 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 232 transitions. [2020-10-28 14:36:57,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:36:57,241 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 232 transitions. [2020-10-28 14:36:57,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:36:57,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:57,242 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:57,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-28 14:36:57,242 INFO L429 AbstractCegarLoop]: === Iteration 80 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:57,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:57,243 INFO L82 PathProgramCache]: Analyzing trace with hash 512056925, now seen corresponding path program 29 times [2020-10-28 14:36:57,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:57,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583610677] [2020-10-28 14:36:57,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:57,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:57,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:57,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:57,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:58,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:00,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:00,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:37:00,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:37:00,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3487 [2020-10-28 14:37:00,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:00,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:00,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:37:00,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:37:00,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 14:37:00,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:01,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:01,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:01,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:01,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:01,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:01,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:37:01,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:01,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:01,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:01,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:01,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:01,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:37:01,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583610677] [2020-10-28 14:37:01,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:37:01,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:37:01,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897771509] [2020-10-28 14:37:01,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:37:01,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:01,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:37:01,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:37:01,371 INFO L87 Difference]: Start difference. First operand 188 states and 232 transitions. Second operand 18 states. [2020-10-28 14:37:03,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:03,392 INFO L93 Difference]: Finished difference Result 246 states and 304 transitions. [2020-10-28 14:37:03,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:37:03,393 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-28 14:37:03,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:03,395 INFO L225 Difference]: With dead ends: 246 [2020-10-28 14:37:03,395 INFO L226 Difference]: Without dead ends: 222 [2020-10-28 14:37:03,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:37:03,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-28 14:37:03,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 186. [2020-10-28 14:37:03,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-28 14:37:03,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 229 transitions. [2020-10-28 14:37:03,465 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 229 transitions. Word has length 44 [2020-10-28 14:37:03,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:03,465 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 229 transitions. [2020-10-28 14:37:03,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:37:03,465 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 229 transitions. [2020-10-28 14:37:03,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:37:03,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:03,466 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:03,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-28 14:37:03,466 INFO L429 AbstractCegarLoop]: === Iteration 81 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:03,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:03,467 INFO L82 PathProgramCache]: Analyzing trace with hash 266372354, now seen corresponding path program 3 times [2020-10-28 14:37:03,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:03,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25568443] [2020-10-28 14:37:03,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:03,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking...