/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/heap-manipulation/merge_sort-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:37:14,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:37:14,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:37:14,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:37:14,864 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:37:14,871 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:37:14,873 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:37:14,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:37:14,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:37:14,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:37:14,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:37:14,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:37:14,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:37:14,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:37:14,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:37:14,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:37:14,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:37:14,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:37:14,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:37:14,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:37:14,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:37:14,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:37:14,940 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:37:14,943 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:37:14,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:37:14,954 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:37:14,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:37:14,957 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:37:14,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:37:14,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:37:14,959 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:37:14,960 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:37:14,962 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:37:14,963 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:37:14,964 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:37:14,964 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:37:14,965 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:37:14,965 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:37:14,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:37:14,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:37:14,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:37:14,975 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 14:37:15,008 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:37:15,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:37:15,009 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:37:15,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:37:15,010 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:37:15,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:37:15,010 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:37:15,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:37:15,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:37:15,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:37:15,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:37:15,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:37:15,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:37:15,012 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:37:15,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:37:15,012 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:37:15,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:37:15,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:37:15,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:37:15,013 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:37:15,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:37:15,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:37:15,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:37:15,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:37:15,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:37:15,015 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:37:15,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:37:15,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:37:15,015 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:37:15,015 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:37:15,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:37:15,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:37:15,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:37:15,439 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:37:15,440 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:37:15,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort-2.i [2020-10-28 14:37:15,546 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2007785ac/536b3d29b772430aaeccf703af78ecbb/FLAG798bca023 [2020-10-28 14:37:16,365 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:37:16,365 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/merge_sort-2.i [2020-10-28 14:37:16,387 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2007785ac/536b3d29b772430aaeccf703af78ecbb/FLAG798bca023 [2020-10-28 14:37:16,632 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2007785ac/536b3d29b772430aaeccf703af78ecbb [2020-10-28 14:37:16,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:37:16,643 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:37:16,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:37:16,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:37:16,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:37:16,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:37:16" (1/1) ... [2020-10-28 14:37:16,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c1e9886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:16, skipping insertion in model container [2020-10-28 14:37:16,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:37:16" (1/1) ... [2020-10-28 14:37:16,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:37:16,714 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:37:17,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:37:17,121 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:37:17,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:37:17,241 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:37:17,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:17 WrapperNode [2020-10-28 14:37:17,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:37:17,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:37:17,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:37:17,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:37:17,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:17" (1/1) ... [2020-10-28 14:37:17,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:17" (1/1) ... [2020-10-28 14:37:17,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:17" (1/1) ... [2020-10-28 14:37:17,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:17" (1/1) ... [2020-10-28 14:37:17,367 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:17" (1/1) ... [2020-10-28 14:37:17,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:17" (1/1) ... [2020-10-28 14:37:17,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:17" (1/1) ... [2020-10-28 14:37:17,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:37:17,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:37:17,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:37:17,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:37:17,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:17" (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 14:37:17,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:37:17,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:37:17,475 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:37:17,475 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-28 14:37:17,475 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-28 14:37:17,476 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-10-28 14:37:17,476 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2020-10-28 14:37:17,476 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2020-10-28 14:37:17,476 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2020-10-28 14:37:17,476 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2020-10-28 14:37:17,476 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2020-10-28 14:37:17,477 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:37:17,477 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:37:17,477 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:37:17,477 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:37:17,477 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:37:17,477 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:37:17,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:37:17,478 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-28 14:37:17,478 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-28 14:37:17,478 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:37:17,478 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:37:17,478 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:37:17,478 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:37:17,479 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:37:17,479 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:37:17,479 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:37:17,479 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:37:17,479 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:37:17,479 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:37:17,480 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:37:17,480 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:37:17,480 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:37:17,480 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:37:17,480 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:37:17,480 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:37:17,481 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:37:17,481 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:37:17,481 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:37:17,481 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:37:17,481 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:37:17,481 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:37:17,481 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:37:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:37:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:37:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:37:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:37:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:37:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:37:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:37:17,483 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:37:17,483 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:37:17,483 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:37:17,483 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:37:17,483 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:37:17,484 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:37:17,484 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:37:17,484 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:37:17,484 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:37:17,484 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:37:17,484 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:37:17,484 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:37:17,485 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:37:17,485 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:37:17,485 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:37:17,485 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:37:17,485 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:37:17,485 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:37:17,486 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:37:17,486 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:37:17,486 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:37:17,486 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:37:17,486 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:37:17,486 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:37:17,487 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:37:17,487 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:37:17,487 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:37:17,487 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:37:17,487 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:37:17,487 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:37:17,487 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:37:17,488 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:37:17,488 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:37:17,488 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:37:17,488 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:37:17,488 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:37:17,488 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:37:17,489 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:37:17,489 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:37:17,489 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:37:17,489 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:37:17,489 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:37:17,489 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:37:17,489 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:37:17,490 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:37:17,490 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:37:17,490 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:37:17,490 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:37:17,490 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:37:17,490 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:37:17,490 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:37:17,490 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:37:17,491 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:37:17,491 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:37:17,491 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:37:17,491 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:37:17,491 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:37:17,491 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:37:17,491 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:37:17,492 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:37:17,492 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:37:17,492 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:37:17,492 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:37:17,492 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:37:17,492 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:37:17,492 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:37:17,493 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:37:17,493 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:37:17,493 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:37:17,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:37:17,493 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-10-28 14:37:17,493 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2020-10-28 14:37:17,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:37:17,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:37:17,494 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2020-10-28 14:37:17,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:37:17,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:37:17,494 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2020-10-28 14:37:17,494 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2020-10-28 14:37:17,494 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2020-10-28 14:37:17,495 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:37:17,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:37:17,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:37:17,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:37:17,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:37:17,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:37:18,304 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:37:18,305 INFO L298 CfgBuilder]: Removed 33 assume(true) statements. [2020-10-28 14:37:18,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:37:18 BoogieIcfgContainer [2020-10-28 14:37:18,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:37:18,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:37:18,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:37:18,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:37:18,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:37:16" (1/3) ... [2020-10-28 14:37:18,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@177e38bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:37:18, skipping insertion in model container [2020-10-28 14:37:18,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:17" (2/3) ... [2020-10-28 14:37:18,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@177e38bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:37:18, skipping insertion in model container [2020-10-28 14:37:18,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:37:18" (3/3) ... [2020-10-28 14:37:18,317 INFO L111 eAbstractionObserver]: Analyzing ICFG merge_sort-2.i [2020-10-28 14:37:18,330 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:37:18,336 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:37:18,350 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:37:18,380 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:37:18,380 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:37:18,380 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:37:18,381 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:37:18,381 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:37:18,381 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:37:18,381 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:37:18,381 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:37:18,403 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states. [2020-10-28 14:37:18,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 14:37:18,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:18,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:18,412 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:18,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:18,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1813451891, now seen corresponding path program 1 times [2020-10-28 14:37:18,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:18,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225666574] [2020-10-28 14:37:18,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:18,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:18,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:18,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:19,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:19,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:37:19,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:37:19,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 447 [2020-10-28 14:37:19,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:19,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:19,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:19,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:37:19,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:19,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 14:37:19,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:19,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:19,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:19,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:19,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:19,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:19,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:37:19,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:19,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:19,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:19,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:19,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:19,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:19,117 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 14:37:19,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225666574] [2020-10-28 14:37:19,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:37:19,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:37:19,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164173750] [2020-10-28 14:37:19,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:37:19,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:19,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:37:19,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:37:19,145 INFO L87 Difference]: Start difference. First operand 120 states. Second operand 3 states. [2020-10-28 14:37:19,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:19,438 INFO L93 Difference]: Finished difference Result 247 states and 418 transitions. [2020-10-28 14:37:19,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:37:19,440 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-28 14:37:19,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:19,453 INFO L225 Difference]: With dead ends: 247 [2020-10-28 14:37:19,453 INFO L226 Difference]: Without dead ends: 120 [2020-10-28 14:37:19,459 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 14:37:19,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-28 14:37:19,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 105. [2020-10-28 14:37:19,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-28 14:37:19,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2020-10-28 14:37:19,520 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 15 [2020-10-28 14:37:19,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:19,521 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2020-10-28 14:37:19,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:37:19,521 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2020-10-28 14:37:19,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:37:19,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:19,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:19,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:37:19,522 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:19,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:19,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1295215036, now seen corresponding path program 1 times [2020-10-28 14:37:19,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:19,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402319968] [2020-10-28 14:37:19,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:19,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:19,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:19,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:19,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:37:19,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:37:19,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-28 14:37:19,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:19,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:19,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:37:19,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:37:19,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:37:19,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:19,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:19,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:19,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:19,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:19,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:19,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:37:19,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:19,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:19,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:19,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:19,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:19,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:37:19,804 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 14:37:19,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402319968] [2020-10-28 14:37:19,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:37:19,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:37:19,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45076067] [2020-10-28 14:37:19,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:37:19,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:19,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:37:19,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:37:19,815 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 4 states. [2020-10-28 14:37:20,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:20,211 INFO L93 Difference]: Finished difference Result 210 states and 259 transitions. [2020-10-28 14:37:20,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:37:20,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-28 14:37:20,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:20,214 INFO L225 Difference]: With dead ends: 210 [2020-10-28 14:37:20,214 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 14:37:20,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:37:20,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 14:37:20,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 107. [2020-10-28 14:37:20,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-28 14:37:20,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2020-10-28 14:37:20,233 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 16 [2020-10-28 14:37:20,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:20,233 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2020-10-28 14:37:20,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:37:20,233 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2020-10-28 14:37:20,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:37:20,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:20,234 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:20,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:37:20,235 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:20,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:20,235 INFO L82 PathProgramCache]: Analyzing trace with hash 909898949, now seen corresponding path program 1 times [2020-10-28 14:37:20,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:20,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276003646] [2020-10-28 14:37:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:20,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:20,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:20,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:20,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:20,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:37:20,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:37:20,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-10-28 14:37:20,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:20,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:20,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:37:20,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:37:20,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:37:20,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:20,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:20,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:20,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:20,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:20,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:20,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:37:20,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:20,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:20,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:20,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:20,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:20,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:20,869 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 14:37:20,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276003646] [2020-10-28 14:37:20,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:37:20,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:37:20,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634431165] [2020-10-28 14:37:20,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:37:20,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:20,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:37:20,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:37:20,872 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand 7 states. [2020-10-28 14:37:21,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:21,608 INFO L93 Difference]: Finished difference Result 161 states and 198 transitions. [2020-10-28 14:37:21,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:37:21,608 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-28 14:37:21,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:21,612 INFO L225 Difference]: With dead ends: 161 [2020-10-28 14:37:21,614 INFO L226 Difference]: Without dead ends: 154 [2020-10-28 14:37:21,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:37:21,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-28 14:37:21,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 110. [2020-10-28 14:37:21,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-28 14:37:21,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 133 transitions. [2020-10-28 14:37:21,646 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 133 transitions. Word has length 22 [2020-10-28 14:37:21,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:21,646 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 133 transitions. [2020-10-28 14:37:21,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:37:21,647 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 133 transitions. [2020-10-28 14:37:21,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:37:21,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:21,648 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, 1, 1, 1, 1] [2020-10-28 14:37:21,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:37:21,648 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:21,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:21,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1845444642, now seen corresponding path program 1 times [2020-10-28 14:37:21,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:21,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869792522] [2020-10-28 14:37:21,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:21,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:21,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:22,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:22,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:37:22,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:37:22,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-28 14:37:22,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:22,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:22,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:37:22,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:37:22,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:37:22,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:22,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:22,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:22,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:22,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:22,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:22,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:37:22,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:22,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:22,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:22,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:22,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:22,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:22,215 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 14:37:22,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869792522] [2020-10-28 14:37:22,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:37:22,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:37:22,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758107911] [2020-10-28 14:37:22,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:37:22,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:22,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:37:22,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:37:22,218 INFO L87 Difference]: Start difference. First operand 110 states and 133 transitions. Second operand 8 states. [2020-10-28 14:37:23,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:23,318 INFO L93 Difference]: Finished difference Result 205 states and 250 transitions. [2020-10-28 14:37:23,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:37:23,322 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-28 14:37:23,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:23,324 INFO L225 Difference]: With dead ends: 205 [2020-10-28 14:37:23,324 INFO L226 Difference]: Without dead ends: 200 [2020-10-28 14:37:23,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:37:23,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-28 14:37:23,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 155. [2020-10-28 14:37:23,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-28 14:37:23,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 189 transitions. [2020-10-28 14:37:23,358 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 189 transitions. Word has length 29 [2020-10-28 14:37:23,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:23,359 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 189 transitions. [2020-10-28 14:37:23,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:37:23,359 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 189 transitions. [2020-10-28 14:37:23,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:37:23,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:23,360 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, 1, 1, 1, 1] [2020-10-28 14:37:23,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:37:23,361 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:23,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:23,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1641676436, now seen corresponding path program 1 times [2020-10-28 14:37:23,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:23,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045091584] [2020-10-28 14:37:23,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:23,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:23,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:23,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:23,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:37:23,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:37:23,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 365 [2020-10-28 14:37:23,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:23,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:23,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:37:23,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:37:23,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:37:23,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:23,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:23,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:23,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:23,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:23,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:23,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:37:23,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:23,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:23,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:23,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:23,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:23,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:23,864 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 14:37:23,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045091584] [2020-10-28 14:37:23,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:37:23,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:37:23,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628502748] [2020-10-28 14:37:23,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:37:23,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:23,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:37:23,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:37:23,877 INFO L87 Difference]: Start difference. First operand 155 states and 189 transitions. Second operand 8 states. [2020-10-28 14:37:24,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:24,763 INFO L93 Difference]: Finished difference Result 238 states and 292 transitions. [2020-10-28 14:37:24,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:37:24,763 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-28 14:37:24,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:24,765 INFO L225 Difference]: With dead ends: 238 [2020-10-28 14:37:24,765 INFO L226 Difference]: Without dead ends: 150 [2020-10-28 14:37:24,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:37:24,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-28 14:37:24,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 136. [2020-10-28 14:37:24,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-28 14:37:24,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 162 transitions. [2020-10-28 14:37:24,782 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 162 transitions. Word has length 29 [2020-10-28 14:37:24,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:24,783 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 162 transitions. [2020-10-28 14:37:24,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:37:24,783 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 162 transitions. [2020-10-28 14:37:24,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:37:24,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:24,784 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:24,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:37:24,785 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:24,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:24,785 INFO L82 PathProgramCache]: Analyzing trace with hash -178219071, now seen corresponding path program 1 times [2020-10-28 14:37:24,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:24,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292084639] [2020-10-28 14:37:24,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:24,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:24,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:24,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:24,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:37:24,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:37:24,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-28 14:37:24,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:24,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:24,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:37:24,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:37:24,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:37:24,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:37:25,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:25,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:25,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:25,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:25,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:25,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:37:25,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:25,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:25,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:25,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:25,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:25,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:25,074 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 14:37:25,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292084639] [2020-10-28 14:37:25,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:37:25,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 14:37:25,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505199419] [2020-10-28 14:37:25,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:37:25,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:25,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:37:25,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:37:25,078 INFO L87 Difference]: Start difference. First operand 136 states and 162 transitions. Second operand 8 states. [2020-10-28 14:37:25,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:25,900 INFO L93 Difference]: Finished difference Result 179 states and 216 transitions. [2020-10-28 14:37:25,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:37:25,901 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-28 14:37:25,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:25,903 INFO L225 Difference]: With dead ends: 179 [2020-10-28 14:37:25,903 INFO L226 Difference]: Without dead ends: 174 [2020-10-28 14:37:25,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:37:25,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-28 14:37:25,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 142. [2020-10-28 14:37:25,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 14:37:25,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 168 transitions. [2020-10-28 14:37:25,921 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 168 transitions. Word has length 32 [2020-10-28 14:37:25,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:25,921 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 168 transitions. [2020-10-28 14:37:25,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:37:25,921 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 168 transitions. [2020-10-28 14:37:25,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:37:25,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:25,923 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:25,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:37:25,923 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:25,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:25,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2052818065, now seen corresponding path program 1 times [2020-10-28 14:37:25,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:25,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154725687] [2020-10-28 14:37:25,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:25,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:26,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:26,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:37:26,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:26,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-28 14:37:26,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:26,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:26,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:37:26,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:37:26,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:37:26,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:26,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:26,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:26,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:26,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:26,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:26,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:37:26,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:26,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:26,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:26,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:26,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:26,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:26,268 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 14:37:26,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154725687] [2020-10-28 14:37:26,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:37:26,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 14:37:26,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184436482] [2020-10-28 14:37:26,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:37:26,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:26,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:37:26,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:37:26,271 INFO L87 Difference]: Start difference. First operand 142 states and 168 transitions. Second operand 9 states. [2020-10-28 14:37:27,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:27,404 INFO L93 Difference]: Finished difference Result 183 states and 221 transitions. [2020-10-28 14:37:27,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:37:27,405 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-28 14:37:27,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:27,407 INFO L225 Difference]: With dead ends: 183 [2020-10-28 14:37:27,407 INFO L226 Difference]: Without dead ends: 178 [2020-10-28 14:37:27,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:37:27,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-28 14:37:27,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 145. [2020-10-28 14:37:27,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-28 14:37:27,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 170 transitions. [2020-10-28 14:37:27,423 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 170 transitions. Word has length 35 [2020-10-28 14:37:27,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:27,424 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 170 transitions. [2020-10-28 14:37:27,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:37:27,424 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 170 transitions. [2020-10-28 14:37:27,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:37:27,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:27,426 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:27,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:37:27,426 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:27,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:27,426 INFO L82 PathProgramCache]: Analyzing trace with hash -818107463, now seen corresponding path program 2 times [2020-10-28 14:37:27,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:27,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666883711] [2020-10-28 14:37:27,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:27,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:27,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:27,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:28,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:28,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:37:28,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:37:28,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1103 [2020-10-28 14:37:28,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:28,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:28,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:37:28,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 14:37:28,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:37:28,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:28,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:28,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:28,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:28,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:28,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:28,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:37:28,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:28,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:28,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:28,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:28,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:28,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 14:37:28,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666883711] [2020-10-28 14:37:28,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:37:28,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:37:28,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301732818] [2020-10-28 14:37:28,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:37:28,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:28,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:37:28,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:37:28,653 INFO L87 Difference]: Start difference. First operand 145 states and 170 transitions. Second operand 6 states. [2020-10-28 14:37:29,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:29,216 INFO L93 Difference]: Finished difference Result 155 states and 182 transitions. [2020-10-28 14:37:29,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:37:29,218 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-28 14:37:29,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:29,220 INFO L225 Difference]: With dead ends: 155 [2020-10-28 14:37:29,220 INFO L226 Difference]: Without dead ends: 150 [2020-10-28 14:37:29,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:37:29,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-28 14:37:29,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 144. [2020-10-28 14:37:29,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 14:37:29,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 167 transitions. [2020-10-28 14:37:29,236 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 167 transitions. Word has length 35 [2020-10-28 14:37:29,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:29,236 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 167 transitions. [2020-10-28 14:37:29,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:37:29,236 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 167 transitions. [2020-10-28 14:37:29,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:37:29,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:29,238 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:29,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:37:29,238 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:29,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:29,239 INFO L82 PathProgramCache]: Analyzing trace with hash -10261245, now seen corresponding path program 2 times [2020-10-28 14:37:29,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:29,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107986744] [2020-10-28 14:37:29,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:29,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:29,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:29,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:29,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:29,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:37:29,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:37:29,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 627 [2020-10-28 14:37:29,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:29,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:29,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:37:29,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 14:37:29,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:37:29,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:29,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:29,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:29,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:29,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:29,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:29,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:37:29,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:29,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:29,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:29,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:29,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:29,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 14:37:29,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107986744] [2020-10-28 14:37:29,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:37:29,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:37:29,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148196330] [2020-10-28 14:37:29,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:37:29,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:29,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:37:29,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:37:29,998 INFO L87 Difference]: Start difference. First operand 144 states and 167 transitions. Second operand 6 states. [2020-10-28 14:37:30,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:30,558 INFO L93 Difference]: Finished difference Result 154 states and 179 transitions. [2020-10-28 14:37:30,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:37:30,559 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-28 14:37:30,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:30,560 INFO L225 Difference]: With dead ends: 154 [2020-10-28 14:37:30,561 INFO L226 Difference]: Without dead ends: 149 [2020-10-28 14:37:30,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:37:30,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-28 14:37:30,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2020-10-28 14:37:30,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-28 14:37:30,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 165 transitions. [2020-10-28 14:37:30,587 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 165 transitions. Word has length 35 [2020-10-28 14:37:30,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:30,591 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 165 transitions. [2020-10-28 14:37:30,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:37:30,591 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 165 transitions. [2020-10-28 14:37:30,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:37:30,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:30,597 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:30,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:37:30,598 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:30,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:30,598 INFO L82 PathProgramCache]: Analyzing trace with hash -869899671, now seen corresponding path program 1 times [2020-10-28 14:37:30,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:30,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568407828] [2020-10-28 14:37:30,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:30,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:30,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:30,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:30,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:37:30,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:37:30,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-28 14:37:30,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:30,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:30,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:37:30,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:37:30,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:37:30,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:30,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:30,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:31,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:31,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:31,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:31,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:37:31,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:31,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:31,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:31,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:31,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:31,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:37:31,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568407828] [2020-10-28 14:37:31,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:37:31,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 14:37:31,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619386977] [2020-10-28 14:37:31,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:37:31,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:31,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:37:31,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:37:31,014 INFO L87 Difference]: Start difference. First operand 143 states and 165 transitions. Second operand 8 states. [2020-10-28 14:37:32,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:32,013 INFO L93 Difference]: Finished difference Result 173 states and 202 transitions. [2020-10-28 14:37:32,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:37:32,014 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-28 14:37:32,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:32,017 INFO L225 Difference]: With dead ends: 173 [2020-10-28 14:37:32,017 INFO L226 Difference]: Without dead ends: 168 [2020-10-28 14:37:32,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:37:32,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-28 14:37:32,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 149. [2020-10-28 14:37:32,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-28 14:37:32,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 171 transitions. [2020-10-28 14:37:32,051 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 171 transitions. Word has length 38 [2020-10-28 14:37:32,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:32,052 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 171 transitions. [2020-10-28 14:37:32,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:37:32,052 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 171 transitions. [2020-10-28 14:37:32,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:37:32,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:32,060 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:32,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:37:32,060 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:32,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:32,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1461845744, now seen corresponding path program 1 times [2020-10-28 14:37:32,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:32,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317057596] [2020-10-28 14:37:32,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:32,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:32,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:32,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 14:37:32,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:32,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-28 14:37:32,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:32,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:32,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:37:32,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:37:32,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:37:32,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:32,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:32,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:32,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:32,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:32,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:32,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:37:32,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:32,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:32,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:32,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:32,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:32,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:37:32,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317057596] [2020-10-28 14:37:32,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:37:32,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 14:37:32,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110341843] [2020-10-28 14:37:32,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:37:32,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:32,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:37:32,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:37:32,588 INFO L87 Difference]: Start difference. First operand 149 states and 171 transitions. Second operand 9 states. [2020-10-28 14:37:33,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:33,675 INFO L93 Difference]: Finished difference Result 177 states and 208 transitions. [2020-10-28 14:37:33,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:37:33,675 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-10-28 14:37:33,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:33,677 INFO L225 Difference]: With dead ends: 177 [2020-10-28 14:37:33,677 INFO L226 Difference]: Without dead ends: 172 [2020-10-28 14:37:33,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:37:33,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-28 14:37:33,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 152. [2020-10-28 14:37:33,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-28 14:37:33,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 174 transitions. [2020-10-28 14:37:33,693 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 174 transitions. Word has length 41 [2020-10-28 14:37:33,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:33,693 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 174 transitions. [2020-10-28 14:37:33,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:37:33,693 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 174 transitions. [2020-10-28 14:37:33,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:37:33,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:33,694 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:33,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:37:33,694 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:33,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:33,695 INFO L82 PathProgramCache]: Analyzing trace with hash -23929413, now seen corresponding path program 1 times [2020-10-28 14:37:33,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:33,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822347234] [2020-10-28 14:37:33,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:33,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:33,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:33,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:33,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:33,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:34,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:34,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:37:34,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:37:34,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 908 [2020-10-28 14:37:34,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:34,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:34,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:37:34,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:37:34,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:37:34,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:34,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:34,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:34,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:34,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:34,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:34,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:37:34,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:34,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:34,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:34,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:34,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:34,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:34,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-28 14:37:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:34,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:34,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:34,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:37:34,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:34,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:37:34,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:34,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:34,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:37:34,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:34,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:37:34,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:34,721 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 14:37:34,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822347234] [2020-10-28 14:37:34,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:37:34,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:37:34,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533854411] [2020-10-28 14:37:34,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:37:34,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:34,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:37:34,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:37:34,723 INFO L87 Difference]: Start difference. First operand 152 states and 174 transitions. Second operand 7 states. [2020-10-28 14:37:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:35,338 INFO L93 Difference]: Finished difference Result 186 states and 217 transitions. [2020-10-28 14:37:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:37:35,339 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-10-28 14:37:35,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:35,341 INFO L225 Difference]: With dead ends: 186 [2020-10-28 14:37:35,341 INFO L226 Difference]: Without dead ends: 181 [2020-10-28 14:37:35,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:37:35,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-28 14:37:35,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 157. [2020-10-28 14:37:35,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-28 14:37:35,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 180 transitions. [2020-10-28 14:37:35,356 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 180 transitions. Word has length 43 [2020-10-28 14:37:35,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:35,356 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 180 transitions. [2020-10-28 14:37:35,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:37:35,356 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 180 transitions. [2020-10-28 14:37:35,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 14:37:35,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:35,357 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:35,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:37:35,358 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:35,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:35,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1825261231, now seen corresponding path program 1 times [2020-10-28 14:37:35,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:35,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960457651] [2020-10-28 14:37:35,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:35,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:35,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:35,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:35,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:38,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:38,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:37:38,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:37:38,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2891 [2020-10-28 14:37:38,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:38,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:38,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:37:38,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:37:38,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:37:38,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:38,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:38,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:38,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:38,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:38,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:38,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 14:37:38,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:38,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:38,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:38,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:38,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:38,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:38,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-28 14:37:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:38,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:38,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:38,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:38,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:38,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:37:38,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:37:38,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-28 14:37:38,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:38,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:38,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:37:38,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:38,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:37:38,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:38,491 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 14:37:38,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960457651] [2020-10-28 14:37:38,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:37:38,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:37:38,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845723011] [2020-10-28 14:37:38,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:37:38,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:38,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:37:38,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:37:38,494 INFO L87 Difference]: Start difference. First operand 157 states and 180 transitions. Second operand 8 states. [2020-10-28 14:37:39,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:39,330 INFO L93 Difference]: Finished difference Result 191 states and 222 transitions. [2020-10-28 14:37:39,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:37:39,331 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-10-28 14:37:39,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:39,333 INFO L225 Difference]: With dead ends: 191 [2020-10-28 14:37:39,333 INFO L226 Difference]: Without dead ends: 186 [2020-10-28 14:37:39,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:37:39,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-28 14:37:39,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 165. [2020-10-28 14:37:39,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-28 14:37:39,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 189 transitions. [2020-10-28 14:37:39,357 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 189 transitions. Word has length 46 [2020-10-28 14:37:39,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:39,357 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 189 transitions. [2020-10-28 14:37:39,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:37:39,358 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 189 transitions. [2020-10-28 14:37:39,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 14:37:39,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:39,359 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:39,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:37:39,359 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:39,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:39,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1445582472, now seen corresponding path program 1 times [2020-10-28 14:37:39,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:39,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358466637] [2020-10-28 14:37:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:39,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:39,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:39,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:39,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:39,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:41,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:41,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:37:41,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:37:41,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1653 [2020-10-28 14:37:41,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:41,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:41,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:37:41,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 14:37:41,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:37:41,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:41,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:41,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:41,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:41,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:41,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:41,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:37:41,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:41,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:41,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:41,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:41,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:41,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:41,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 14:37:41,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358466637] [2020-10-28 14:37:41,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:37:41,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:37:41,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442346376] [2020-10-28 14:37:41,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:37:41,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:41,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:37:41,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:37:41,167 INFO L87 Difference]: Start difference. First operand 165 states and 189 transitions. Second operand 6 states. [2020-10-28 14:37:41,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:41,682 INFO L93 Difference]: Finished difference Result 175 states and 201 transitions. [2020-10-28 14:37:41,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:37:41,682 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-28 14:37:41,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:41,684 INFO L225 Difference]: With dead ends: 175 [2020-10-28 14:37:41,684 INFO L226 Difference]: Without dead ends: 169 [2020-10-28 14:37:41,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:37:41,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-28 14:37:41,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 163. [2020-10-28 14:37:41,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-28 14:37:41,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 185 transitions. [2020-10-28 14:37:41,701 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 185 transitions. Word has length 46 [2020-10-28 14:37:41,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:41,701 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 185 transitions. [2020-10-28 14:37:41,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:37:41,701 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 185 transitions. [2020-10-28 14:37:41,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:37:41,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:41,702 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:41,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:37:41,702 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:41,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:41,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1245020584, now seen corresponding path program 1 times [2020-10-28 14:37:41,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:41,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923138394] [2020-10-28 14:37:41,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:41,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:41,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:41,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:42,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:42,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 14:37:42,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:37:42,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 604 [2020-10-28 14:37:42,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:42,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:42,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:37:42,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:37:42,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:37:42,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:42,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:42,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:42,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:42,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:42,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:42,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:37:42,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:42,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:42,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:42,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:42,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:42,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:42,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-28 14:37:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:42,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:42,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:42,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:37:42,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:42,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:37:42,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:42,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:42,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:37:42,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:42,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:37:42,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:42,424 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 14:37:42,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923138394] [2020-10-28 14:37:42,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:37:42,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 14:37:42,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702865080] [2020-10-28 14:37:42,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:37:42,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:42,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:37:42,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:37:42,426 INFO L87 Difference]: Start difference. First operand 163 states and 185 transitions. Second operand 8 states. [2020-10-28 14:37:43,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:43,255 INFO L93 Difference]: Finished difference Result 190 states and 219 transitions. [2020-10-28 14:37:43,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:37:43,256 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-10-28 14:37:43,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:43,257 INFO L225 Difference]: With dead ends: 190 [2020-10-28 14:37:43,258 INFO L226 Difference]: Without dead ends: 185 [2020-10-28 14:37:43,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:37:43,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-28 14:37:43,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 169. [2020-10-28 14:37:43,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-28 14:37:43,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 192 transitions. [2020-10-28 14:37:43,279 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 192 transitions. Word has length 49 [2020-10-28 14:37:43,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:43,279 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 192 transitions. [2020-10-28 14:37:43,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:37:43,279 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 192 transitions. [2020-10-28 14:37:43,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:37:43,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:43,281 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:43,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:37:43,281 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:43,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:43,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1057963739, now seen corresponding path program 1 times [2020-10-28 14:37:43,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:43,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943292860] [2020-10-28 14:37:43,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:43,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:43,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:43,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:43,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:43,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:43,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:43,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:43,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:43,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:47,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:48,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:48,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 14:37:48,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 14:37:48,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 14:37:48,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:48,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:48,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:37:48,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:37:48,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:37:48,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:48,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:48,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:48,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:48,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:48,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:48,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:37:48,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:48,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:48,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:48,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:48,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:48,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:48,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-28 14:37:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:48,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:48,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:48,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:37:48,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:48,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:37:48,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:48,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:48,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:37:48,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:48,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:37:48,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:48,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-28 14:37:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:48,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:48,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:48,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:37:48,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:48,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 14:37:48,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:48,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:48,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:37:48,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:37:48,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:37:48,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:37:48,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943292860] [2020-10-28 14:37:48,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:37:48,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 14:37:48,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117900689] [2020-10-28 14:37:48,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:37:48,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:48,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:37:48,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:37:48,502 INFO L87 Difference]: Start difference. First operand 169 states and 192 transitions. Second operand 8 states. [2020-10-28 14:37:49,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:49,261 INFO L93 Difference]: Finished difference Result 233 states and 274 transitions. [2020-10-28 14:37:49,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:37:49,263 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-10-28 14:37:49,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:49,265 INFO L225 Difference]: With dead ends: 233 [2020-10-28 14:37:49,265 INFO L226 Difference]: Without dead ends: 181 [2020-10-28 14:37:49,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:37:49,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-28 14:37:49,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 174. [2020-10-28 14:37:49,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-28 14:37:49,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 199 transitions. [2020-10-28 14:37:49,287 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 199 transitions. Word has length 52 [2020-10-28 14:37:49,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:49,287 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 199 transitions. [2020-10-28 14:37:49,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:37:49,288 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 199 transitions. [2020-10-28 14:37:49,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:37:49,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:49,289 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:49,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:37:49,289 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:49,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:49,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1561998367, now seen corresponding path program 1 times [2020-10-28 14:37:49,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:49,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330481314] [2020-10-28 14:37:49,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:49,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:49,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:49,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:49,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:49,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:49,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:50,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:50,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:50,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:51,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:54,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:54,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 14:37:54,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 14:37:54,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 14:37:54,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:54,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:54,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:37:54,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:37:54,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:37:54,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:54,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:54,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:54,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:54,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:54,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:54,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:54,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:37:54,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:54,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:54,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:54,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:54,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:54,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:54,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-28 14:37:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:54,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:54,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:54,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:54,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:54,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:37:54,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:37:54,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-28 14:37:54,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:54,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:54,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:37:54,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:54,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:37:54,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:54,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-28 14:37:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:54,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:54,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:54,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 14:37:54,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:54,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:37:54,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:54,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:54,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:54,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-28 14:37:54,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:54,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:37:54,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330481314] [2020-10-28 14:37:54,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:37:54,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:37:54,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125337053] [2020-10-28 14:37:54,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:37:54,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:54,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:37:54,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:37:54,603 INFO L87 Difference]: Start difference. First operand 174 states and 199 transitions. Second operand 7 states. [2020-10-28 14:37:55,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:55,304 INFO L93 Difference]: Finished difference Result 238 states and 280 transitions. [2020-10-28 14:37:55,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:37:55,305 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-28 14:37:55,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:55,307 INFO L225 Difference]: With dead ends: 238 [2020-10-28 14:37:55,307 INFO L226 Difference]: Without dead ends: 181 [2020-10-28 14:37:55,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:37:55,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-28 14:37:55,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 174. [2020-10-28 14:37:55,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-28 14:37:55,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 198 transitions. [2020-10-28 14:37:55,325 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 198 transitions. Word has length 53 [2020-10-28 14:37:55,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:55,325 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 198 transitions. [2020-10-28 14:37:55,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:37:55,325 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 198 transitions. [2020-10-28 14:37:55,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:37:55,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:55,327 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:55,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:37:55,327 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:55,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:55,328 INFO L82 PathProgramCache]: Analyzing trace with hash 522653338, now seen corresponding path program 2 times [2020-10-28 14:37:55,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:55,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569192603] [2020-10-28 14:37:55,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:55,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:55,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:55,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:55,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:56,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:56,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:56,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:56,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:56,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:59,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:59,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 14:37:59,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 14:37:59,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4059 [2020-10-28 14:37:59,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:59,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:59,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:37:59,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:37:59,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 14:37:59,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:59,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:59,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:59,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:59,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:59,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:59,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:37:59,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:59,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:59,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:59,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:59,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:59,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:59,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 14:37:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:59,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:59,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:59,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:59,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:59,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:37:59,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:37:59,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-28 14:37:59,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:59,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:59,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:37:59,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:59,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:37:59,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:59,544 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:37:59,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569192603] [2020-10-28 14:37:59,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:37:59,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:37:59,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61762477] [2020-10-28 14:37:59,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:37:59,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:59,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:37:59,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:37:59,548 INFO L87 Difference]: Start difference. First operand 174 states and 198 transitions. Second operand 7 states. [2020-10-28 14:38:00,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:38:00,089 INFO L93 Difference]: Finished difference Result 198 states and 225 transitions. [2020-10-28 14:38:00,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:38:00,091 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-10-28 14:38:00,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:38:00,092 INFO L225 Difference]: With dead ends: 198 [2020-10-28 14:38:00,092 INFO L226 Difference]: Without dead ends: 176 [2020-10-28 14:38:00,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:38:00,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-28 14:38:00,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 168. [2020-10-28 14:38:00,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-28 14:38:00,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 190 transitions. [2020-10-28 14:38:00,111 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 190 transitions. Word has length 52 [2020-10-28 14:38:00,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:38:00,111 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 190 transitions. [2020-10-28 14:38:00,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:38:00,111 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 190 transitions. [2020-10-28 14:38:00,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:38:00,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:38:00,112 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:38:00,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:38:00,113 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:38:00,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:38:00,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1439250587, now seen corresponding path program 1 times [2020-10-28 14:38:00,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:38:00,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504558987] [2020-10-28 14:38:00,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:38:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:00,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:00,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:00,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:00,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 14:38:00,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:38:00,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-10-28 14:38:00,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:00,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:00,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:38:00,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:38:00,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 14:38:00,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:00,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:38:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:00,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:00,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:00,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:38:00,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:00,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:38:00,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:00,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:00,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:38:00,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:38:00,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:38:00,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:38:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:38:00,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504558987] [2020-10-28 14:38:00,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:38:00,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:38:00,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808197956] [2020-10-28 14:38:00,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:38:00,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:38:00,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:38:00,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:38:00,896 INFO L87 Difference]: Start difference. First operand 168 states and 190 transitions. Second operand 13 states. [2020-10-28 14:38:02,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:38:02,738 INFO L93 Difference]: Finished difference Result 220 states and 253 transitions. [2020-10-28 14:38:02,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:38:02,738 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-28 14:38:02,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:38:02,741 INFO L225 Difference]: With dead ends: 220 [2020-10-28 14:38:02,741 INFO L226 Difference]: Without dead ends: 215 [2020-10-28 14:38:02,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:38:02,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-28 14:38:02,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 179. [2020-10-28 14:38:02,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-28 14:38:02,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 202 transitions. [2020-10-28 14:38:02,759 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 202 transitions. Word has length 52 [2020-10-28 14:38:02,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:38:02,759 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 202 transitions. [2020-10-28 14:38:02,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:38:02,759 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 202 transitions. [2020-10-28 14:38:02,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:38:02,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:38:02,760 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:38:02,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:38:02,761 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:38:02,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:38:02,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1770964732, now seen corresponding path program 1 times [2020-10-28 14:38:02,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:38:02,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602769623] [2020-10-28 14:38:02,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:38:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:02,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:02,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:03,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:03,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:05,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:05,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 14:38:05,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:38:05,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2713 [2020-10-28 14:38:05,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:05,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:05,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:38:05,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:38:05,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 14:38:05,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:05,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:38:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:05,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:05,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:05,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:38:05,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:05,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:38:05,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:05,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:05,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:38:05,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:38:05,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:38:05,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:38:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:38:05,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602769623] [2020-10-28 14:38:05,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:38:05,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:38:05,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465711148] [2020-10-28 14:38:05,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:38:05,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:38:05,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:38:05,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:38:05,706 INFO L87 Difference]: Start difference. First operand 179 states and 202 transitions. Second operand 13 states. [2020-10-28 14:38:07,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:38:07,382 INFO L93 Difference]: Finished difference Result 219 states and 251 transitions. [2020-10-28 14:38:07,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:38:07,383 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-28 14:38:07,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:38:07,385 INFO L225 Difference]: With dead ends: 219 [2020-10-28 14:38:07,386 INFO L226 Difference]: Without dead ends: 214 [2020-10-28 14:38:07,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:38:07,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-28 14:38:07,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 186. [2020-10-28 14:38:07,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-28 14:38:07,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 209 transitions. [2020-10-28 14:38:07,403 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 209 transitions. Word has length 52 [2020-10-28 14:38:07,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:38:07,403 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 209 transitions. [2020-10-28 14:38:07,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:38:07,403 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 209 transitions. [2020-10-28 14:38:07,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 14:38:07,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:38:07,404 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:38:07,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:38:07,404 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:38:07,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:38:07,405 INFO L82 PathProgramCache]: Analyzing trace with hash -248068396, now seen corresponding path program 1 times [2020-10-28 14:38:07,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:38:07,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529465653] [2020-10-28 14:38:07,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:38:07,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:07,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:07,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:07,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:08,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:08,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 14:38:08,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:38:08,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 713 [2020-10-28 14:38:08,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:08,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:08,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:38:08,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-28 14:38:08,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:38:08,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:08,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:38:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:08,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:08,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:08,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:38:08,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:08,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:38:08,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:08,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:08,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:38:08,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:38:08,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:38:08,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:08,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-28 14:38:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:08,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:08,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:08,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:38:08,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:08,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:38:08,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:08,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:08,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:38:08,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:38:08,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:38:08,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:38:08,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529465653] [2020-10-28 14:38:08,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:38:08,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:38:08,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317682682] [2020-10-28 14:38:08,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:38:08,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:38:08,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:38:08,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:38:08,222 INFO L87 Difference]: Start difference. First operand 186 states and 209 transitions. Second operand 6 states. [2020-10-28 14:38:08,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:38:08,711 INFO L93 Difference]: Finished difference Result 195 states and 220 transitions. [2020-10-28 14:38:08,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:38:08,712 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-28 14:38:08,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:38:08,714 INFO L225 Difference]: With dead ends: 195 [2020-10-28 14:38:08,714 INFO L226 Difference]: Without dead ends: 152 [2020-10-28 14:38:08,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:38:08,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-28 14:38:08,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147. [2020-10-28 14:38:08,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-28 14:38:08,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 167 transitions. [2020-10-28 14:38:08,732 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 167 transitions. Word has length 55 [2020-10-28 14:38:08,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:38:08,732 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 167 transitions. [2020-10-28 14:38:08,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:38:08,732 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 167 transitions. [2020-10-28 14:38:08,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 14:38:08,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:38:08,733 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:38:08,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:38:08,733 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:38:08,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:38:08,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1363773109, now seen corresponding path program 1 times [2020-10-28 14:38:08,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:38:08,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659055764] [2020-10-28 14:38:08,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:38:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:08,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:08,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:08,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 14:38:08,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:08,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-28 14:38:08,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:08,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:08,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:38:08,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:38:08,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 14:38:08,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:09,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:38:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:09,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:09,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:09,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:38:09,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:09,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:38:09,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:09,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:09,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:38:09,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:38:09,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:38:09,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:38:09,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659055764] [2020-10-28 14:38:09,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:38:09,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:38:09,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954504635] [2020-10-28 14:38:09,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:38:09,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:38:09,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:38:09,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:38:09,456 INFO L87 Difference]: Start difference. First operand 147 states and 167 transitions. Second operand 13 states. [2020-10-28 14:38:09,816 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-28 14:38:09,997 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-28 14:38:11,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:38:11,563 INFO L93 Difference]: Finished difference Result 179 states and 207 transitions. [2020-10-28 14:38:11,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:38:11,565 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-10-28 14:38:11,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:38:11,567 INFO L225 Difference]: With dead ends: 179 [2020-10-28 14:38:11,568 INFO L226 Difference]: Without dead ends: 174 [2020-10-28 14:38:11,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:38:11,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-28 14:38:11,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 140. [2020-10-28 14:38:11,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-28 14:38:11,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 160 transitions. [2020-10-28 14:38:11,587 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 160 transitions. Word has length 55 [2020-10-28 14:38:11,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:38:11,587 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 160 transitions. [2020-10-28 14:38:11,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:38:11,588 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 160 transitions. [2020-10-28 14:38:11,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 14:38:11,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:38:11,591 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:38:11,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:38:11,591 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:38:11,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:38:11,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1378213493, now seen corresponding path program 1 times [2020-10-28 14:38:11,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:38:11,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948369719] [2020-10-28 14:38:11,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:38:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:11,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:11,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:11,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:12,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:12,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:15,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:15,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 14:38:15,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:38:15,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4331 [2020-10-28 14:38:15,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:15,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:15,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:38:15,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:38:15,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 14:38:15,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:16,297 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2020-10-28 14:38:16,419 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-10-28 14:38:16,541 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-10-28 14:38:16,679 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-10-28 14:38:16,823 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-10-28 14:38:17,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:38:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:17,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:17,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:17,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:38:17,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:17,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:38:17,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:17,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:17,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:38:17,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:38:17,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:38:17,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:17,412 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 14:38:17,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948369719] [2020-10-28 14:38:17,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:38:17,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:38:17,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944502380] [2020-10-28 14:38:17,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:38:17,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:38:17,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:38:17,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:38:17,414 INFO L87 Difference]: Start difference. First operand 140 states and 160 transitions. Second operand 18 states. [2020-10-28 14:38:18,088 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-28 14:38:18,950 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 100 [2020-10-28 14:38:19,379 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 95 [2020-10-28 14:38:19,596 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-28 14:38:20,052 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-28 14:38:20,366 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-10-28 14:38:20,783 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2020-10-28 14:38:21,081 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-10-28 14:38:21,405 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-10-28 14:38:22,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:38:22,114 INFO L93 Difference]: Finished difference Result 251 states and 284 transitions. [2020-10-28 14:38:22,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:38:22,115 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-10-28 14:38:22,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:38:22,117 INFO L225 Difference]: With dead ends: 251 [2020-10-28 14:38:22,117 INFO L226 Difference]: Without dead ends: 246 [2020-10-28 14:38:22,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:38:22,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-28 14:38:22,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 214. [2020-10-28 14:38:22,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-28 14:38:22,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 242 transitions. [2020-10-28 14:38:22,136 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 242 transitions. Word has length 55 [2020-10-28 14:38:22,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:38:22,136 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 242 transitions. [2020-10-28 14:38:22,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:38:22,136 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 242 transitions. [2020-10-28 14:38:22,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 14:38:22,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:38:22,138 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:38:22,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:38:22,138 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:38:22,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:38:22,138 INFO L82 PathProgramCache]: Analyzing trace with hash -2049990024, now seen corresponding path program 2 times [2020-10-28 14:38:22,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:38:22,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525690824] [2020-10-28 14:38:22,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:38:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:22,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:22,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:22,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:22,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:22,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:23,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:23,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:23,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:23,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:23,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:25,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:25,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:25,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:27,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:27,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 14:38:27,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 14:38:27,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 14:38:27,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:27,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:27,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:38:27,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:38:27,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:38:27,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:38:27,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:38:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:27,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:27,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:27,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:38:27,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:27,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:38:27,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:27,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:27,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:38:27,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:38:27,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:38:27,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:27,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 14:38:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:27,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:27,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:27,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:27,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:27,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:38:27,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:38:27,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 14:38:27,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:27,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:27,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:38:27,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:38:27,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:38:27,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:27,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-28 14:38:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:27,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:27,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:27,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 14:38:27,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:27,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 14:38:27,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:27,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:27,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:38:27,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:38:27,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:38:27,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:38:27,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525690824] [2020-10-28 14:38:27,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:38:27,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:38:27,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557633628] [2020-10-28 14:38:27,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:38:27,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:38:27,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:38:27,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:38:27,380 INFO L87 Difference]: Start difference. First operand 214 states and 242 transitions. Second operand 10 states. [2020-10-28 14:38:28,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:38:28,276 INFO L93 Difference]: Finished difference Result 273 states and 317 transitions. [2020-10-28 14:38:28,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:38:28,277 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-28 14:38:28,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:38:28,281 INFO L225 Difference]: With dead ends: 273 [2020-10-28 14:38:28,281 INFO L226 Difference]: Without dead ends: 225 [2020-10-28 14:38:28,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:38:28,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-28 14:38:28,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 215. [2020-10-28 14:38:28,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-28 14:38:28,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 244 transitions. [2020-10-28 14:38:28,302 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 244 transitions. Word has length 59 [2020-10-28 14:38:28,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:38:28,302 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 244 transitions. [2020-10-28 14:38:28,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:38:28,302 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 244 transitions. [2020-10-28 14:38:28,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 14:38:28,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:38:28,303 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:38:28,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:38:28,304 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:38:28,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:38:28,304 INFO L82 PathProgramCache]: Analyzing trace with hash 569666380, now seen corresponding path program 2 times [2020-10-28 14:38:28,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:38:28,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529101538] [2020-10-28 14:38:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:38:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:28,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:28,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:28,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 14:38:28,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:28,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-28 14:38:28,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:28,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:28,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:38:28,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:38:28,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 14:38:28,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:29,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:38:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:29,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:29,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:29,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:38:29,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:29,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:38:29,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:29,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:29,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:38:29,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:38:29,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:38:29,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:38:29,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529101538] [2020-10-28 14:38:29,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:38:29,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:38:29,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324795526] [2020-10-28 14:38:29,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:38:29,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:38:29,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:38:29,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:38:29,132 INFO L87 Difference]: Start difference. First operand 215 states and 244 transitions. Second operand 13 states. [2020-10-28 14:38:29,428 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-10-28 14:38:29,698 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-10-28 14:38:29,891 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2020-10-28 14:38:31,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:38:31,396 INFO L93 Difference]: Finished difference Result 260 states and 290 transitions. [2020-10-28 14:38:31,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:38:31,397 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-10-28 14:38:31,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:38:31,400 INFO L225 Difference]: With dead ends: 260 [2020-10-28 14:38:31,400 INFO L226 Difference]: Without dead ends: 255 [2020-10-28 14:38:31,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:38:31,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-28 14:38:31,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 144. [2020-10-28 14:38:31,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 14:38:31,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 165 transitions. [2020-10-28 14:38:31,417 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 165 transitions. Word has length 61 [2020-10-28 14:38:31,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:38:31,418 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 165 transitions. [2020-10-28 14:38:31,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:38:31,418 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 165 transitions. [2020-10-28 14:38:31,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 14:38:31,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:38:31,419 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:38:31,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:38:31,420 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:38:31,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:38:31,420 INFO L82 PathProgramCache]: Analyzing trace with hash 946843306, now seen corresponding path program 1 times [2020-10-28 14:38:31,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:38:31,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950160783] [2020-10-28 14:38:31,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:38:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:31,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:31,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:31,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:31,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:31,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:31,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:31,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:31,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:31,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:34,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:34,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:35,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:35,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:35,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:35,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:36,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:36,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 14:38:36,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 14:38:36,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 14:38:36,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:36,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:36,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:38:36,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-28 14:38:36,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:38:36,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:36,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:38:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:36,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:36,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:36,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:38:36,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:36,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:38:36,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:36,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:36,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:38:36,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:38:36,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:38:36,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:36,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 14:38:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:36,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:36,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:36,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:38:36,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:36,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:38:36,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:36,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:36,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:38:36,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:38:36,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:38:36,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:36,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-28 14:38:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:36,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:36,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:36,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:38:36,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:36,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 14:38:36,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:36,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:36,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:38:36,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-28 14:38:36,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:38:36,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:36,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-28 14:38:36,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:36,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:36,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:36,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 14:38:36,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:36,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 14:38:36,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:36,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:36,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:38:36,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-10-28 14:38:36,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:38:36,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:36,582 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 14:38:36,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950160783] [2020-10-28 14:38:36,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:38:36,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:38:36,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469554122] [2020-10-28 14:38:36,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:38:36,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:38:36,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:38:36,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:38:36,584 INFO L87 Difference]: Start difference. First operand 144 states and 165 transitions. Second operand 5 states. [2020-10-28 14:38:36,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:38:36,951 INFO L93 Difference]: Finished difference Result 198 states and 237 transitions. [2020-10-28 14:38:36,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:38:36,953 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-28 14:38:36,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:38:36,955 INFO L225 Difference]: With dead ends: 198 [2020-10-28 14:38:36,956 INFO L226 Difference]: Without dead ends: 149 [2020-10-28 14:38:36,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:38:36,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-28 14:38:36,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2020-10-28 14:38:36,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-28 14:38:36,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 166 transitions. [2020-10-28 14:38:36,971 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 166 transitions. Word has length 69 [2020-10-28 14:38:36,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:38:36,972 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 166 transitions. [2020-10-28 14:38:36,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:38:36,972 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 166 transitions. [2020-10-28 14:38:36,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 14:38:36,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:38:36,973 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:38:36,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:38:36,973 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:38:36,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:38:36,974 INFO L82 PathProgramCache]: Analyzing trace with hash 129194856, now seen corresponding path program 1 times [2020-10-28 14:38:36,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:38:36,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745325624] [2020-10-28 14:38:36,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:38:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:37,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:37,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:37,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:37,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:37,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:37,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:37,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:37,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:38,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:38,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:38,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:38,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:40,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:40,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:41,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:41,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 14:38:41,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 14:38:41,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 14:38:41,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:41,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:41,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:38:41,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:38:41,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:38:41,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:42,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:38:42,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:42,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:42,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:42,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:38:42,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:42,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:38:42,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:42,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:42,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:38:42,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:38:42,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:38:42,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:42,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 14:38:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:42,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:42,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:42,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:42,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:38:42,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:38:42,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 14:38:42,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:42,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:42,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:38:42,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:38:42,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:38:42,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:42,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-28 14:38:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:42,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:42,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:42,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:38:42,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:42,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 14:38:42,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:42,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:42,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:38:42,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 14:38:42,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:38:42,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:42,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-28 14:38:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:42,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:42,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:42,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 14:38:42,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:42,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:38:42,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:42,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:42,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:38:42,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:38:42,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:38:42,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:38:42,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745325624] [2020-10-28 14:38:42,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:38:42,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:38:42,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976909964] [2020-10-28 14:38:42,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:38:42,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:38:42,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:38:42,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:38:42,210 INFO L87 Difference]: Start difference. First operand 145 states and 166 transitions. Second operand 10 states. [2020-10-28 14:38:43,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:38:43,173 INFO L93 Difference]: Finished difference Result 218 states and 253 transitions. [2020-10-28 14:38:43,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:38:43,173 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-10-28 14:38:43,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:38:43,175 INFO L225 Difference]: With dead ends: 218 [2020-10-28 14:38:43,175 INFO L226 Difference]: Without dead ends: 152 [2020-10-28 14:38:43,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:38:43,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-28 14:38:43,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 145. [2020-10-28 14:38:43,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-28 14:38:43,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 165 transitions. [2020-10-28 14:38:43,197 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 165 transitions. Word has length 69 [2020-10-28 14:38:43,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:38:43,197 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 165 transitions. [2020-10-28 14:38:43,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:38:43,197 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 165 transitions. [2020-10-28 14:38:43,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 14:38:43,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:38:43,198 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:38:43,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:38:43,199 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:38:43,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:38:43,199 INFO L82 PathProgramCache]: Analyzing trace with hash 2108453568, now seen corresponding path program 2 times [2020-10-28 14:38:43,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:38:43,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141942261] [2020-10-28 14:38:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:38:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:43,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:43,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:43,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:43,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:44,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:44,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:44,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:44,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:44,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:45,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:45,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:45,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:48,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:48,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 14:38:48,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 14:38:48,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 14:38:48,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:48,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:48,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:38:48,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:38:48,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 14:38:48,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:48,469 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2020-10-28 14:38:49,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:38:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:49,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:49,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:49,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:38:49,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:49,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:38:49,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:49,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:49,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:38:49,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:38:49,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:38:49,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:38:49,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141942261] [2020-10-28 14:38:49,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:38:49,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:38:49,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048802201] [2020-10-28 14:38:49,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:38:49,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:38:49,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:38:49,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:38:49,249 INFO L87 Difference]: Start difference. First operand 145 states and 165 transitions. Second operand 17 states. [2020-10-28 14:38:50,418 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-28 14:38:50,655 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2020-10-28 14:38:51,071 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-10-28 14:38:51,346 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2020-10-28 14:38:51,782 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 72 [2020-10-28 14:38:52,336 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 77 [2020-10-28 14:38:52,627 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2020-10-28 14:38:53,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:38:53,308 INFO L93 Difference]: Finished difference Result 236 states and 264 transitions. [2020-10-28 14:38:53,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:38:53,308 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-10-28 14:38:53,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:38:53,311 INFO L225 Difference]: With dead ends: 236 [2020-10-28 14:38:53,311 INFO L226 Difference]: Without dead ends: 231 [2020-10-28 14:38:53,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:38:53,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-28 14:38:53,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 219. [2020-10-28 14:38:53,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-28 14:38:53,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 245 transitions. [2020-10-28 14:38:53,331 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 245 transitions. Word has length 66 [2020-10-28 14:38:53,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:38:53,331 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 245 transitions. [2020-10-28 14:38:53,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:38:53,331 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 245 transitions. [2020-10-28 14:38:53,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 14:38:53,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:38:53,332 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:38:53,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:38:53,332 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:38:53,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:38:53,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1776739423, now seen corresponding path program 2 times [2020-10-28 14:38:53,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:38:53,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704845258] [2020-10-28 14:38:53,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:38:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:53,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:53,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:53,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:53,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:53,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:54,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:56,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:56,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 14:38:56,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:38:56,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3120 [2020-10-28 14:38:56,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:56,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:56,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:38:56,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:38:56,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 14:38:56,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:56,741 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2020-10-28 14:38:56,859 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2020-10-28 14:38:56,987 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-10-28 14:38:57,169 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2020-10-28 14:38:57,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:38:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:57,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:57,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:57,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:38:57,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:57,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:38:57,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:57,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:57,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:38:57,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:38:57,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:38:57,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:38:57,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704845258] [2020-10-28 14:38:57,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:38:57,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:38:57,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674014182] [2020-10-28 14:38:57,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:38:57,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:38:57,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:38:57,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:38:57,612 INFO L87 Difference]: Start difference. First operand 219 states and 245 transitions. Second operand 16 states. [2020-10-28 14:38:58,166 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-28 14:38:58,533 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-28 14:38:59,057 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 85 [2020-10-28 14:38:59,227 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-10-28 14:38:59,734 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-28 14:39:00,138 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-28 14:39:00,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:00,829 INFO L93 Difference]: Finished difference Result 267 states and 298 transitions. [2020-10-28 14:39:00,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:39:00,829 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 66 [2020-10-28 14:39:00,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:00,831 INFO L225 Difference]: With dead ends: 267 [2020-10-28 14:39:00,831 INFO L226 Difference]: Without dead ends: 262 [2020-10-28 14:39:00,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:39:00,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-28 14:39:00,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 230. [2020-10-28 14:39:00,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-28 14:39:00,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 257 transitions. [2020-10-28 14:39:00,857 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 257 transitions. Word has length 66 [2020-10-28 14:39:00,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:00,857 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 257 transitions. [2020-10-28 14:39:00,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:39:00,858 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 257 transitions. [2020-10-28 14:39:00,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 14:39:00,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:00,859 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:00,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:39:00,859 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:00,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:00,859 INFO L82 PathProgramCache]: Analyzing trace with hash 2030455824, now seen corresponding path program 2 times [2020-10-28 14:39:00,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:00,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046256211] [2020-10-28 14:39:00,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:00,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:00,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:01,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:01,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:01,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:02,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:02,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:03,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:03,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:03,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:03,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:03,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:03,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:04,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:05,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:05,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:05,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:05,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 14:39:05,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 14:39:05,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 14:39:05,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:05,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:05,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:39:05,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:39:05,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 14:39:05,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:06,539 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 34 [2020-10-28 14:39:06,722 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-10-28 14:39:06,913 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-10-28 14:39:07,118 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-10-28 14:39:07,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:07,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:07,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:07,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:07,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:07,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:39:07,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:07,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:07,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:07,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:07,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:07,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:39:07,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046256211] [2020-10-28 14:39:07,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:07,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:39:07,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079657985] [2020-10-28 14:39:07,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:39:07,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:07,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:39:07,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:39:07,727 INFO L87 Difference]: Start difference. First operand 230 states and 257 transitions. Second operand 19 states. [2020-10-28 14:39:08,368 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-10-28 14:39:08,788 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-28 14:39:08,956 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-28 14:39:09,224 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-10-28 14:39:09,699 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-10-28 14:39:10,040 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 74 [2020-10-28 14:39:10,404 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 82 [2020-10-28 14:39:10,740 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 80 [2020-10-28 14:39:11,176 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 83 [2020-10-28 14:39:11,956 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 84 [2020-10-28 14:39:12,292 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 84 [2020-10-28 14:39:12,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:12,870 INFO L93 Difference]: Finished difference Result 246 states and 274 transitions. [2020-10-28 14:39:12,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:39:12,871 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2020-10-28 14:39:12,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:12,874 INFO L225 Difference]: With dead ends: 246 [2020-10-28 14:39:12,874 INFO L226 Difference]: Without dead ends: 240 [2020-10-28 14:39:12,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:39:12,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-28 14:39:12,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 220. [2020-10-28 14:39:12,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-28 14:39:12,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 245 transitions. [2020-10-28 14:39:12,896 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 245 transitions. Word has length 69 [2020-10-28 14:39:12,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:12,897 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 245 transitions. [2020-10-28 14:39:12,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:39:12,897 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 245 transitions. [2020-10-28 14:39:12,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 14:39:12,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:12,898 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:12,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:39:12,898 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:12,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:12,899 INFO L82 PathProgramCache]: Analyzing trace with hash -37729911, now seen corresponding path program 3 times [2020-10-28 14:39:12,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:12,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470684032] [2020-10-28 14:39:12,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:12,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:13,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:13,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:13,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 14:39:13,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:39:13,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1034 [2020-10-28 14:39:13,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:13,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:13,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:39:13,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:39:13,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 14:39:13,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:14,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:14,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:14,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:14,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:14,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:14,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:14,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:39:14,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:14,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:14,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:14,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:14,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:14,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:39:14,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470684032] [2020-10-28 14:39:14,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:14,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:39:14,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208385011] [2020-10-28 14:39:14,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:39:14,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:14,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:39:14,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:39:14,484 INFO L87 Difference]: Start difference. First operand 220 states and 245 transitions. Second operand 17 states. [2020-10-28 14:39:17,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:17,598 INFO L93 Difference]: Finished difference Result 267 states and 298 transitions. [2020-10-28 14:39:17,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:39:17,599 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-10-28 14:39:17,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:17,601 INFO L225 Difference]: With dead ends: 267 [2020-10-28 14:39:17,602 INFO L226 Difference]: Without dead ends: 262 [2020-10-28 14:39:17,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:39:17,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-28 14:39:17,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 231. [2020-10-28 14:39:17,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-28 14:39:17,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 257 transitions. [2020-10-28 14:39:17,624 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 257 transitions. Word has length 72 [2020-10-28 14:39:17,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:17,624 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 257 transitions. [2020-10-28 14:39:17,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:39:17,625 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 257 transitions. [2020-10-28 14:39:17,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 14:39:17,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:17,626 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:17,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:39:17,626 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:17,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:17,626 INFO L82 PathProgramCache]: Analyzing trace with hash -369444056, now seen corresponding path program 3 times [2020-10-28 14:39:17,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:17,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995257496] [2020-10-28 14:39:17,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:17,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:17,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:18,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:18,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:22,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:22,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 14:39:22,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:39:22,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 14:39:22,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:22,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:22,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:39:22,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:39:22,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 14:39:22,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:23,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:23,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:23,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:23,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:23,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:23,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:39:23,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:23,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:23,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:23,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:23,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:23,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:39:23,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995257496] [2020-10-28 14:39:23,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:23,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:39:23,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675217671] [2020-10-28 14:39:23,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:39:23,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:23,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:39:23,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:39:23,190 INFO L87 Difference]: Start difference. First operand 231 states and 257 transitions. Second operand 17 states. [2020-10-28 14:39:26,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:26,333 INFO L93 Difference]: Finished difference Result 266 states and 296 transitions. [2020-10-28 14:39:26,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:39:26,334 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-10-28 14:39:26,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:26,336 INFO L225 Difference]: With dead ends: 266 [2020-10-28 14:39:26,336 INFO L226 Difference]: Without dead ends: 261 [2020-10-28 14:39:26,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:39:26,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-28 14:39:26,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 238. [2020-10-28 14:39:26,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-28 14:39:26,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 264 transitions. [2020-10-28 14:39:26,359 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 264 transitions. Word has length 72 [2020-10-28 14:39:26,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:26,359 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 264 transitions. [2020-10-28 14:39:26,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:39:26,359 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 264 transitions. [2020-10-28 14:39:26,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 14:39:26,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:26,360 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:26,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:39:26,361 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:26,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:26,361 INFO L82 PathProgramCache]: Analyzing trace with hash -38398809, now seen corresponding path program 3 times [2020-10-28 14:39:26,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:26,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131067514] [2020-10-28 14:39:26,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:26,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:26,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:26,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 14:39:26,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:26,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-10-28 14:39:26,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:26,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:26,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:39:26,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:39:26,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 14:39:26,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:27,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:27,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:27,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:27,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:27,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:27,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:39:27,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:27,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:27,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:27,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:27,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:27,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:39:27,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131067514] [2020-10-28 14:39:27,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:27,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:39:27,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73453282] [2020-10-28 14:39:27,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:39:27,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:27,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:39:27,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:39:27,588 INFO L87 Difference]: Start difference. First operand 238 states and 264 transitions. Second operand 17 states. [2020-10-28 14:39:28,002 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-28 14:39:28,309 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-10-28 14:39:28,790 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2020-10-28 14:39:29,182 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 101 [2020-10-28 14:39:31,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:31,927 INFO L93 Difference]: Finished difference Result 265 states and 294 transitions. [2020-10-28 14:39:31,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:39:31,928 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2020-10-28 14:39:31,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:31,930 INFO L225 Difference]: With dead ends: 265 [2020-10-28 14:39:31,931 INFO L226 Difference]: Without dead ends: 260 [2020-10-28 14:39:31,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:39:31,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-28 14:39:31,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 231. [2020-10-28 14:39:31,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-28 14:39:31,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 257 transitions. [2020-10-28 14:39:31,960 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 257 transitions. Word has length 75 [2020-10-28 14:39:31,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:31,960 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 257 transitions. [2020-10-28 14:39:31,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:39:31,960 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 257 transitions. [2020-10-28 14:39:31,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 14:39:31,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:31,966 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:39:31,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:39:31,966 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:31,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:31,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1591379503, now seen corresponding path program 3 times [2020-10-28 14:39:31,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:31,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803560377] [2020-10-28 14:39:31,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:32,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:32,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:32,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:32,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:33,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:34,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:35,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:35,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:35,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:36,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:37,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:37,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 14:39:37,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 14:39:37,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-28 14:39:37,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:37,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:37,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 14:39:37,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:39:37,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 14:39:37,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:38,035 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 63 [2020-10-28 14:39:38,335 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2020-10-28 14:39:38,594 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2020-10-28 14:39:39,081 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2020-10-28 14:39:39,423 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2020-10-28 14:39:39,724 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2020-10-28 14:39:39,969 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-28 14:39:40,258 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-10-28 14:39:40,534 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2020-10-28 14:39:40,820 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2020-10-28 14:39:41,078 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2020-10-28 14:39:41,271 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2020-10-28 14:39:41,501 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2020-10-28 14:39:41,670 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2020-10-28 14:39:42,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:42,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:42,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:42,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:42,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:42,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:39:42,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:42,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:42,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:42,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:42,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:42,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:39:42,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803560377] [2020-10-28 14:39:42,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:42,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 14:39:42,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135364797] [2020-10-28 14:39:42,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 14:39:42,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:42,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 14:39:42,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:39:42,178 INFO L87 Difference]: Start difference. First operand 231 states and 257 transitions. Second operand 26 states. [2020-10-28 14:39:42,997 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-28 14:39:43,300 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-28 14:39:44,418 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 135 [2020-10-28 14:39:45,058 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 128 [2020-10-28 14:39:45,353 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-28 14:39:46,046 WARN L193 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 122 [2020-10-28 14:39:46,546 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 105 [2020-10-28 14:39:47,394 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 111 [2020-10-28 14:39:47,880 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 105 [2020-10-28 14:39:48,334 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-28 14:39:49,099 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 103 [2020-10-28 14:39:49,402 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-28 14:39:49,985 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2020-10-28 14:39:50,244 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-28 14:39:50,561 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-28 14:39:51,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:51,768 INFO L93 Difference]: Finished difference Result 386 states and 423 transitions. [2020-10-28 14:39:51,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 14:39:51,769 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-10-28 14:39:51,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:51,772 INFO L225 Difference]: With dead ends: 386 [2020-10-28 14:39:51,772 INFO L226 Difference]: Without dead ends: 381 [2020-10-28 14:39:51,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 14:39:51,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-10-28 14:39:51,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 319. [2020-10-28 14:39:51,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-10-28 14:39:51,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 353 transitions. [2020-10-28 14:39:51,803 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 353 transitions. Word has length 75 [2020-10-28 14:39:51,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:51,804 INFO L481 AbstractCegarLoop]: Abstraction has 319 states and 353 transitions. [2020-10-28 14:39:51,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 14:39:51,804 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 353 transitions. [2020-10-28 14:39:51,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 14:39:51,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:51,805 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:51,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:39:51,806 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:51,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:51,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1053061485, now seen corresponding path program 1 times [2020-10-28 14:39:51,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:51,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101808891] [2020-10-28 14:39:51,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:51,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:51,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:51,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:51,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:52,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:52,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:52,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:52,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:54,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:54,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:54,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:54,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:56,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:56,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 14:39:56,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 14:39:56,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 14:39:56,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:56,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:56,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:39:56,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:39:56,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 14:39:56,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:56,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:39:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:56,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:56,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:56,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:39:56,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:56,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:39:56,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:56,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:56,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:39:56,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:56,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:39:56,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:56,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 14:39:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:56,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:56,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:56,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:39:56,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:56,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 14:39:56,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:56,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:56,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:39:56,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:56,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:39:56,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:56,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-28 14:39:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:57,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:57,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:57,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:39:57,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:57,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-28 14:39:57,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:57,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:57,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:39:57,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:57,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:39:57,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:57,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-28 14:39:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:57,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:57,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:39:57,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 14:39:57,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:39:57,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 14:39:57,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:39:57,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:39:57,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:39:57,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:39:57,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:39:57,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:39:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 14:39:57,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101808891] [2020-10-28 14:39:57,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:39:57,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:39:57,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088560855] [2020-10-28 14:39:57,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:39:57,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:39:57,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:39:57,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:39:57,185 INFO L87 Difference]: Start difference. First operand 319 states and 353 transitions. Second operand 12 states. [2020-10-28 14:39:58,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:39:58,446 INFO L93 Difference]: Finished difference Result 352 states and 397 transitions. [2020-10-28 14:39:58,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:39:58,446 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-10-28 14:39:58,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:39:58,449 INFO L225 Difference]: With dead ends: 352 [2020-10-28 14:39:58,449 INFO L226 Difference]: Without dead ends: 347 [2020-10-28 14:39:58,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:39:58,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-28 14:39:58,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 335. [2020-10-28 14:39:58,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-10-28 14:39:58,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 377 transitions. [2020-10-28 14:39:58,481 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 377 transitions. Word has length 83 [2020-10-28 14:39:58,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:39:58,482 INFO L481 AbstractCegarLoop]: Abstraction has 335 states and 377 transitions. [2020-10-28 14:39:58,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:39:58,482 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 377 transitions. [2020-10-28 14:39:58,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 14:39:58,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:39:58,483 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:39:58,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:39:58,483 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:39:58,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:39:58,484 INFO L82 PathProgramCache]: Analyzing trace with hash 227808378, now seen corresponding path program 4 times [2020-10-28 14:39:58,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:39:58,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100824188] [2020-10-28 14:39:58,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:39:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:39:58,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:58,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:58,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:59,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:59,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:39:59,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:00,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:00,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:00,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:00,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:00,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:01,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:01,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:02,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:02,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:02,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:02,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 14:40:02,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 14:40:02,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4480 [2020-10-28 14:40:02,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:02,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:02,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:40:02,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:02,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 14:40:02,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:03,342 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2020-10-28 14:40:03,491 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-28 14:40:03,643 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-28 14:40:03,823 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-10-28 14:40:04,094 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2020-10-28 14:40:04,345 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2020-10-28 14:40:04,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:04,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:04,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:04,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:04,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:04,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:40:04,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:04,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:04,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:04,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:04,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:04,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 5 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:04,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100824188] [2020-10-28 14:40:04,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:04,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:40:04,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436687039] [2020-10-28 14:40:04,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:40:04,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:04,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:40:04,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:40:04,734 INFO L87 Difference]: Start difference. First operand 335 states and 377 transitions. Second operand 18 states. [2020-10-28 14:40:05,399 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 14:40:05,845 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-28 14:40:06,188 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-10-28 14:40:06,859 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-10-28 14:40:07,044 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-28 14:40:07,531 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-10-28 14:40:08,171 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2020-10-28 14:40:08,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:08,817 INFO L93 Difference]: Finished difference Result 356 states and 399 transitions. [2020-10-28 14:40:08,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:40:08,818 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-10-28 14:40:08,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:08,820 INFO L225 Difference]: With dead ends: 356 [2020-10-28 14:40:08,820 INFO L226 Difference]: Without dead ends: 351 [2020-10-28 14:40:08,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:40:08,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-28 14:40:08,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 300. [2020-10-28 14:40:08,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-10-28 14:40:08,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 339 transitions. [2020-10-28 14:40:08,851 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 339 transitions. Word has length 80 [2020-10-28 14:40:08,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:08,851 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 339 transitions. [2020-10-28 14:40:08,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:40:08,852 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 339 transitions. [2020-10-28 14:40:08,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 14:40:08,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:08,853 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:08,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:40:08,853 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:08,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:08,854 INFO L82 PathProgramCache]: Analyzing trace with hash -544725863, now seen corresponding path program 1 times [2020-10-28 14:40:08,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:08,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940866412] [2020-10-28 14:40:08,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:08,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:08,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:09,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:09,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:09,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:10,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:13,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:13,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 14:40:13,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:40:13,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 14:40:13,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:13,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:13,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:40:13,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 14:40:13,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 14:40:13,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:13,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:13,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:13,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:13,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:13,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:13,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:40:13,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:13,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:13,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:13,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:13,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:13,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:13,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 14:40:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:13,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:13,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:13,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:13,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:40:13,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:40:13,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 14:40:13,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:13,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:13,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:40:13,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:13,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:40:13,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:13,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-28 14:40:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:13,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:14,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:14,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:40:14,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:14,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-28 14:40:14,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:14,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:14,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:40:14,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:40:14,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:40:14,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:14,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-28 14:40:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:14,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:14,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:14,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 14:40:14,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:14,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 14:40:14,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:14,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:14,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:40:14,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:14,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:40:14,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 14:40:14,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940866412] [2020-10-28 14:40:14,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:14,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:40:14,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208748163] [2020-10-28 14:40:14,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:40:14,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:14,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:40:14,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:40:14,255 INFO L87 Difference]: Start difference. First operand 300 states and 339 transitions. Second operand 12 states. [2020-10-28 14:40:15,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:15,624 INFO L93 Difference]: Finished difference Result 409 states and 496 transitions. [2020-10-28 14:40:15,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:40:15,625 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 84 [2020-10-28 14:40:15,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:15,627 INFO L225 Difference]: With dead ends: 409 [2020-10-28 14:40:15,627 INFO L226 Difference]: Without dead ends: 343 [2020-10-28 14:40:15,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:40:15,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-28 14:40:15,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 321. [2020-10-28 14:40:15,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-10-28 14:40:15,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 374 transitions. [2020-10-28 14:40:15,661 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 374 transitions. Word has length 84 [2020-10-28 14:40:15,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:15,662 INFO L481 AbstractCegarLoop]: Abstraction has 321 states and 374 transitions. [2020-10-28 14:40:15,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:40:15,662 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 374 transitions. [2020-10-28 14:40:15,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 14:40:15,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:15,663 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:40:15,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:40:15,663 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:15,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:15,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1196673752, now seen corresponding path program 4 times [2020-10-28 14:40:15,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:15,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591102578] [2020-10-28 14:40:15,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:15,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:16,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:16,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 14:40:16,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:16,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 704 [2020-10-28 14:40:16,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:16,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:16,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:40:16,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:40:16,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 14:40:16,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:17,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:17,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:17,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:17,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:17,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:17,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:40:17,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:17,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:17,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:17,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:17,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:17,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:40:17,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591102578] [2020-10-28 14:40:17,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:17,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:40:17,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074383499] [2020-10-28 14:40:17,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:40:17,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:17,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:40:17,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:40:17,190 INFO L87 Difference]: Start difference. First operand 321 states and 374 transitions. Second operand 17 states. [2020-10-28 14:40:17,647 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-28 14:40:17,942 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 88 [2020-10-28 14:40:18,474 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 96 [2020-10-28 14:40:18,805 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 98 [2020-10-28 14:40:19,017 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-28 14:40:21,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:21,830 INFO L93 Difference]: Finished difference Result 374 states and 431 transitions. [2020-10-28 14:40:21,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:40:21,831 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2020-10-28 14:40:21,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:21,834 INFO L225 Difference]: With dead ends: 374 [2020-10-28 14:40:21,834 INFO L226 Difference]: Without dead ends: 369 [2020-10-28 14:40:21,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:40:21,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-28 14:40:21,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 236. [2020-10-28 14:40:21,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-28 14:40:21,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 281 transitions. [2020-10-28 14:40:21,859 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 281 transitions. Word has length 81 [2020-10-28 14:40:21,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:21,860 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 281 transitions. [2020-10-28 14:40:21,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:40:21,860 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 281 transitions. [2020-10-28 14:40:21,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 14:40:21,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:21,861 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:21,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:40:21,861 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:21,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:21,862 INFO L82 PathProgramCache]: Analyzing trace with hash 2084922852, now seen corresponding path program 4 times [2020-10-28 14:40:21,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:21,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228272684] [2020-10-28 14:40:21,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:21,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:21,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:22,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:22,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:22,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:23,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:23,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:24,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:24,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:25,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:25,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:26,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:26,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:26,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:26,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 14:40:26,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 14:40:26,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 14:40:26,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:26,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:26,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 14:40:26,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:26,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 14:40:26,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:27,845 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 51 [2020-10-28 14:40:28,303 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-10-28 14:40:29,166 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 67 [2020-10-28 14:40:29,530 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2020-10-28 14:40:29,892 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2020-10-28 14:40:30,250 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2020-10-28 14:40:30,550 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2020-10-28 14:40:30,859 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 46 [2020-10-28 14:40:31,126 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 40 [2020-10-28 14:40:31,503 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2020-10-28 14:40:31,764 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 32 [2020-10-28 14:40:32,033 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2020-10-28 14:40:32,252 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2020-10-28 14:40:32,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:32,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:32,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:32,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:32,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:32,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:40:32,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:32,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:32,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:32,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:32,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:32,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:32,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228272684] [2020-10-28 14:40:32,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:32,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:40:32,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131214179] [2020-10-28 14:40:32,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:40:32,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:32,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:40:32,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:40:32,874 INFO L87 Difference]: Start difference. First operand 236 states and 281 transitions. Second operand 25 states. [2020-10-28 14:40:33,759 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 73 [2020-10-28 14:40:34,040 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 46 [2020-10-28 14:40:34,273 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-28 14:40:34,623 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 14:40:35,407 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-28 14:40:36,182 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 14:40:36,486 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-28 14:40:36,925 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 14:40:37,207 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-28 14:40:37,707 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-10-28 14:40:38,272 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 111 [2020-10-28 14:40:38,551 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-28 14:40:38,982 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 99 [2020-10-28 14:40:39,885 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-10-28 14:40:40,350 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 93 [2020-10-28 14:40:40,945 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-28 14:40:41,209 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-28 14:40:42,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:42,509 INFO L93 Difference]: Finished difference Result 574 states and 676 transitions. [2020-10-28 14:40:42,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 14:40:42,512 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 86 [2020-10-28 14:40:42,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:42,515 INFO L225 Difference]: With dead ends: 574 [2020-10-28 14:40:42,515 INFO L226 Difference]: Without dead ends: 456 [2020-10-28 14:40:42,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=219, Invalid=1673, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 14:40:42,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-10-28 14:40:42,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 370. [2020-10-28 14:40:42,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-10-28 14:40:42,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 425 transitions. [2020-10-28 14:40:42,561 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 425 transitions. Word has length 86 [2020-10-28 14:40:42,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:42,561 INFO L481 AbstractCegarLoop]: Abstraction has 370 states and 425 transitions. [2020-10-28 14:40:42,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:40:42,562 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 425 transitions. [2020-10-28 14:40:42,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 14:40:42,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:42,563 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:42,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 14:40:42,564 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:42,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:42,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1753208707, now seen corresponding path program 5 times [2020-10-28 14:40:42,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:42,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550959490] [2020-10-28 14:40:42,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:42,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:42,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:43,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking...