/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-simple/sll2n_append_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:26:15,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:26:15,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:26:15,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:26:15,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:26:15,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:26:15,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:26:15,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:26:15,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:26:15,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:26:15,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:26:15,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:26:15,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:26:15,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:26:15,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:26:15,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:26:15,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:26:15,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:26:15,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:26:15,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:26:15,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:26:15,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:26:15,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:26:15,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:26:15,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:26:15,917 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:26:15,929 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:26:15,932 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:26:15,933 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:26:15,934 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:26:15,934 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:26:15,935 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:26:15,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:26:15,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:26:15,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:26:15,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:26:15,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:26:15,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:26:15,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:26:15,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:26:15,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:26:15,945 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:26:16,005 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:26:16,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:26:16,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:26:16,011 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:26:16,011 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:26:16,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:26:16,012 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:26:16,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:26:16,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:26:16,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:26:16,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:26:16,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:26:16,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:26:16,014 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:26:16,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:26:16,015 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:26:16,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:26:16,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:26:16,016 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:26:16,016 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:26:16,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:26:16,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:26:16,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:26:16,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:26:16,017 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:26:16,017 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:26:16,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:26:16,018 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:26:16,018 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:26:16,018 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:26:16,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:26:16,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:26:16,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:26:16,502 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:26:16,503 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:26:16,504 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2n_append_equal.i [2020-10-27 01:26:16,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1e1d6e843/cc7e7563d6014702a893105c970ec35e/FLAG70bb8b71c [2020-10-27 01:26:17,264 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:26:17,265 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-simple/sll2n_append_equal.i [2020-10-27 01:26:17,291 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1e1d6e843/cc7e7563d6014702a893105c970ec35e/FLAG70bb8b71c [2020-10-27 01:26:17,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1e1d6e843/cc7e7563d6014702a893105c970ec35e [2020-10-27 01:26:17,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:26:17,557 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:26:17,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:26:17,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:26:17,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:26:17,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:26:17" (1/1) ... [2020-10-27 01:26:17,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@588701b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:26:17, skipping insertion in model container [2020-10-27 01:26:17,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:26:17" (1/1) ... [2020-10-27 01:26:17,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:26:17,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:26:18,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:26:18,136 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:26:18,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:26:18,286 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:26:18,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:26:18 WrapperNode [2020-10-27 01:26:18,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:26:18,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:26:18,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:26:18,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:26:18,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:26:18" (1/1) ... [2020-10-27 01:26:18,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:26:18" (1/1) ... [2020-10-27 01:26:18,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:26:18" (1/1) ... [2020-10-27 01:26:18,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:26:18" (1/1) ... [2020-10-27 01:26:18,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:26:18" (1/1) ... [2020-10-27 01:26:18,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:26:18" (1/1) ... [2020-10-27 01:26:18,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:26:18" (1/1) ... [2020-10-27 01:26:18,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:26:18,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:26:18,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:26:18,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:26:18,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:26:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:26:18,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:26:18,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:26:18,441 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:26:18,442 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 01:26:18,442 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 01:26:18,442 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-27 01:26:18,442 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2020-10-27 01:26:18,442 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-10-27 01:26:18,442 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-10-27 01:26:18,443 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2020-10-27 01:26:18,443 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:26:18,443 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:26:18,443 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:26:18,443 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:26:18,443 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:26:18,444 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:26:18,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:26:18,444 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 01:26:18,444 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 01:26:18,444 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:26:18,444 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:26:18,445 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:26:18,445 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:26:18,445 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:26:18,445 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:26:18,445 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:26:18,445 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:26:18,446 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:26:18,446 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:26:18,446 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:26:18,446 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:26:18,446 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:26:18,446 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:26:18,446 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:26:18,447 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:26:18,447 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:26:18,447 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:26:18,447 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:26:18,447 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:26:18,447 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:26:18,447 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:26:18,448 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:26:18,448 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:26:18,448 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:26:18,448 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:26:18,448 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:26:18,448 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:26:18,448 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:26:18,449 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:26:18,449 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:26:18,449 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:26:18,449 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:26:18,449 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:26:18,449 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:26:18,449 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:26:18,450 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:26:18,450 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:26:18,450 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:26:18,450 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:26:18,450 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:26:18,450 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:26:18,451 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:26:18,451 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:26:18,451 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:26:18,451 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:26:18,451 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:26:18,451 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:26:18,452 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:26:18,452 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:26:18,452 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:26:18,452 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:26:18,452 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:26:18,452 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:26:18,453 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:26:18,453 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:26:18,453 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:26:18,453 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:26:18,453 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:26:18,453 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:26:18,453 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:26:18,454 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:26:18,454 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:26:18,454 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:26:18,454 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:26:18,454 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:26:18,454 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:26:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:26:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:26:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:26:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:26:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:26:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:26:18,456 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:26:18,456 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:26:18,456 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:26:18,456 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:26:18,456 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:26:18,456 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:26:18,456 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:26:18,457 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:26:18,457 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:26:18,457 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:26:18,457 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:26:18,457 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:26:18,457 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:26:18,457 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:26:18,458 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:26:18,458 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:26:18,458 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:26:18,458 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:26:18,458 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:26:18,458 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:26:18,458 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:26:18,459 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:26:18,459 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:26:18,459 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:26:18,459 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:26:18,459 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:26:18,459 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:26:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:26:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:26:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-27 01:26:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2020-10-27 01:26:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:26:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:26:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:26:18,461 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-10-27 01:26:18,461 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-10-27 01:26:18,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:26:18,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:26:18,461 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2020-10-27 01:26:18,461 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:26:18,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-27 01:26:18,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:26:18,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:26:18,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:26:18,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:26:18,884 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-27 01:26:19,106 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:26:19,107 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-27 01:26:19,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:26:19 BoogieIcfgContainer [2020-10-27 01:26:19,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:26:19,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:26:19,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:26:19,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:26:19,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:26:17" (1/3) ... [2020-10-27 01:26:19,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b6d3252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:26:19, skipping insertion in model container [2020-10-27 01:26:19,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:26:18" (2/3) ... [2020-10-27 01:26:19,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b6d3252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:26:19, skipping insertion in model container [2020-10-27 01:26:19,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:26:19" (3/3) ... [2020-10-27 01:26:19,119 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_append_equal.i [2020-10-27 01:26:19,132 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:26:19,138 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:26:19,153 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:26:19,182 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:26:19,182 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:26:19,182 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:26:19,182 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:26:19,183 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:26:19,183 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:26:19,183 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:26:19,183 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:26:19,202 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-10-27 01:26:19,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:26:19,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:26:19,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:26:19,212 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:26:19,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:26:19,219 INFO L82 PathProgramCache]: Analyzing trace with hash -2003178217, now seen corresponding path program 1 times [2020-10-27 01:26:19,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:26:19,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123939359] [2020-10-27 01:26:19,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:26:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:19,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:19,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:20,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:20,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:26:20,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:26:20,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 689 [2020-10-27 01:26:20,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:20,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:26:20,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:26:20,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:26:20,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:26:20,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:26:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:20,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:20,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:20,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:26:20,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:20,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:26:20,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:20,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:26:20,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:26:20,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:26:20,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:20,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:26:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:20,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:20,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:20,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:26:20,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:20,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 01:26:20,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:20,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:26:20,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 01:26:20,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:26:20,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:20,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-27 01:26:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:20,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:20,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:20,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:26:20,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:20,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 01:26:20,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:20,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:26:20,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:26:20,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:26:20,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:20,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:26:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:20,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:20,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:20,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:26:20,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:20,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 01:26:20,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:20,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:26:20,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:26:20,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:26:20,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:26:20,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123939359] [2020-10-27 01:26:20,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:26:20,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 01:26:20,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185612308] [2020-10-27 01:26:20,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:26:20,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:26:20,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:26:20,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:26:20,440 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 7 states. [2020-10-27 01:26:20,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:26:20,814 INFO L93 Difference]: Finished difference Result 105 states and 136 transitions. [2020-10-27 01:26:20,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:26:20,816 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-27 01:26:20,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:26:20,825 INFO L225 Difference]: With dead ends: 105 [2020-10-27 01:26:20,826 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 01:26:20,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:26:20,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 01:26:20,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-10-27 01:26:20,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:26:20,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-10-27 01:26:20,904 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 31 [2020-10-27 01:26:20,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:26:20,905 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-10-27 01:26:20,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:26:20,905 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-10-27 01:26:20,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:26:20,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:26:20,908 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:26:20,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:26:20,909 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:26:20,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:26:20,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1079017718, now seen corresponding path program 1 times [2020-10-27 01:26:20,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:26:20,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548195124] [2020-10-27 01:26:20,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:26:20,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:20,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:21,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:21,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:21,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:21,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:22,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:22,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:25,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:25,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:25,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:25,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:26:25,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:26:25,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 01:26:25,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:25,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:26:25,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:26:25,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:26:25,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:26,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:26:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:26,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:26,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:26,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:26:26,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:26,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:26:26,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:26,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:26:26,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:26:26,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:26:26,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:26,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:26:26,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:26,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:26,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:26,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 01:26:26,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:26,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-27 01:26:26,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:26,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:26:26,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:26:26,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:26:26,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:26,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 01:26:26,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:26,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:26,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:26,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:26:26,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:26,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 01:26:26,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:26,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:26:26,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:26:26,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:26:26,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:26:26,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 01:26:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:26,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:26,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:26,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:26,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:26:26,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:26:26,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-27 01:26:26,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:26,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:26:26,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:26:26,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:26:26,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:26,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:26:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:26,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:26,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:26,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:26:26,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:26,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 01:26:26,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:26,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:26:26,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:26:26,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:26:26,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:26:26,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548195124] [2020-10-27 01:26:26,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:26:26,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:26:26,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749937851] [2020-10-27 01:26:26,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:26:26,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:26:26,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:26:26,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:26:26,859 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 20 states. [2020-10-27 01:26:27,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:26:27,502 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-10-27 01:26:27,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:26:27,502 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 40 [2020-10-27 01:26:27,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:26:27,504 INFO L225 Difference]: With dead ends: 57 [2020-10-27 01:26:27,505 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 01:26:27,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:26:27,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 01:26:27,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2020-10-27 01:26:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 01:26:27,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-27 01:26:27,517 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 40 [2020-10-27 01:26:27,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:26:27,518 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-27 01:26:27,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:26:27,518 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-27 01:26:27,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:26:27,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:26:27,521 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:26:27,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:26:27,521 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:26:27,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:26:27,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1080626432, now seen corresponding path program 1 times [2020-10-27 01:26:27,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:26:27,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346825677] [2020-10-27 01:26:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:26:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:27,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:27,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:27,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:28,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:32,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:32,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:26:32,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:26:32,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 01:26:32,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:32,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:26:32,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:26:32,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:26:32,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:26:32,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:26:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:32,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:32,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:32,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:26:32,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:32,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:26:32,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:32,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:26:32,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:26:32,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:26:32,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:32,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:26:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:32,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:32,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:32,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 01:26:32,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:32,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-27 01:26:32,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:32,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:26:32,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:26:32,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:26:32,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:26:32,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 01:26:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:32,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:32,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:32,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:26:32,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:32,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 01:26:32,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:32,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:26:32,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:26:32,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:26:32,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:32,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 01:26:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:32,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:32,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:32,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:26:32,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:32,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-27 01:26:32,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:32,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:26:32,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:26:32,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:26:32,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:33,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:26:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:33,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:33,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:33,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:26:33,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:33,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 01:26:33,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:33,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:26:33,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:26:33,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:26:33,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:26:33,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346825677] [2020-10-27 01:26:33,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:26:33,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:26:33,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588893711] [2020-10-27 01:26:33,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:26:33,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:26:33,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:26:33,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:26:33,277 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 18 states. [2020-10-27 01:26:34,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:26:34,152 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2020-10-27 01:26:34,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:26:34,153 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-27 01:26:34,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:26:34,154 INFO L225 Difference]: With dead ends: 53 [2020-10-27 01:26:34,154 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 01:26:34,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:26:34,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 01:26:34,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-27 01:26:34,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:26:34,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-27 01:26:34,171 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 40 [2020-10-27 01:26:34,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:26:34,171 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-27 01:26:34,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:26:34,171 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-27 01:26:34,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:26:34,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:26:34,173 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:26:34,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:26:34,173 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:26:34,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:26:34,174 INFO L82 PathProgramCache]: Analyzing trace with hash -591849570, now seen corresponding path program 1 times [2020-10-27 01:26:34,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:26:34,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15985738] [2020-10-27 01:26:34,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:26:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:34,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:34,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:34,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:34,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:34,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:34,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:35,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:36,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:36,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:37,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:38,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:38,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:39,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:39,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:26:39,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 01:26:39,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 01:26:39,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:39,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:26:39,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:26:39,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:26:39,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:39,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:26:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:39,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:39,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:39,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:26:39,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:39,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:26:39,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:39,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:26:39,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:26:39,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:26:39,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:39,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:26:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:39,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:39,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:39,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 01:26:39,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:39,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-27 01:26:39,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:39,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:26:39,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:26:39,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:26:39,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:39,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 01:26:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:39,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:39,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:39,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:26:39,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:39,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-27 01:26:39,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:39,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:26:39,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:26:39,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:26:39,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:39,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 01:26:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:39,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:39,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:39,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:40,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:40,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 01:26:40,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:26:40,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 931 [2020-10-27 01:26:40,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:40,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:26:40,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:26:40,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:26:40,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:40,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:26:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:40,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:40,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:40,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:26:40,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:40,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-27 01:26:40,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:40,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:26:40,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:26:40,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:26:40,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:26:40,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15985738] [2020-10-27 01:26:40,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:26:40,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:26:40,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678636393] [2020-10-27 01:26:40,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:26:40,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:26:40,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:26:40,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:26:40,924 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 20 states. [2020-10-27 01:26:42,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:26:42,208 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-10-27 01:26:42,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:26:42,208 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2020-10-27 01:26:42,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:26:42,210 INFO L225 Difference]: With dead ends: 60 [2020-10-27 01:26:42,210 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:26:42,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:26:42,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:26:42,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2020-10-27 01:26:42,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:26:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2020-10-27 01:26:42,221 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 43 [2020-10-27 01:26:42,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:26:42,221 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2020-10-27 01:26:42,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:26:42,221 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2020-10-27 01:26:42,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:26:42,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:26:42,223 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:26:42,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:26:42,224 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:26:42,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:26:42,224 INFO L82 PathProgramCache]: Analyzing trace with hash -590240856, now seen corresponding path program 1 times [2020-10-27 01:26:42,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:26:42,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849159998] [2020-10-27 01:26:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:26:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:42,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:42,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:43,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:43,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:26:43,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:26:43,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1626 [2020-10-27 01:26:43,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:43,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:26:43,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:26:43,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 01:26:43,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:44,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:26:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:44,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:44,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:44,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:26:44,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:44,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:26:44,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:44,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:26:44,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:26:44,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:26:44,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:44,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:26:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:44,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:44,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:44,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 01:26:44,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:44,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-27 01:26:44,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:44,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:26:44,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:26:44,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:26:44,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:44,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 01:26:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:44,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:44,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:44,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:26:44,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:44,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 01:26:44,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:44,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:26:44,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:26:44,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:26:44,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:44,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 01:26:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:44,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:44,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:44,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 01:26:44,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:44,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-27 01:26:44,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:44,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:26:44,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:26:44,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:26:44,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:44,879 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-27 01:26:45,109 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-27 01:26:45,522 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-27 01:26:45,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:26:45,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:45,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:45,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:45,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:26:45,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:45,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-27 01:26:45,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:45,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:26:45,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:26:45,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:26:45,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:46,219 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-10-27 01:26:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:26:46,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849159998] [2020-10-27 01:26:46,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:26:46,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:26:46,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194055882] [2020-10-27 01:26:46,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:26:46,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:26:46,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:26:46,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:26:46,250 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 22 states. [2020-10-27 01:26:47,435 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-27 01:26:47,766 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-27 01:26:48,394 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-27 01:26:48,938 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2020-10-27 01:26:49,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:26:49,602 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-10-27 01:26:49,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:26:49,603 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2020-10-27 01:26:49,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:26:49,606 INFO L225 Difference]: With dead ends: 64 [2020-10-27 01:26:49,606 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 01:26:49,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=163, Invalid=1319, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:26:49,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 01:26:49,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 48. [2020-10-27 01:26:49,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 01:26:49,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-10-27 01:26:49,618 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 43 [2020-10-27 01:26:49,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:26:49,619 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-10-27 01:26:49,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:26:49,625 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-10-27 01:26:49,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:26:49,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:26:49,627 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:26:49,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:26:49,627 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:26:49,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:26:49,629 INFO L82 PathProgramCache]: Analyzing trace with hash -281428007, now seen corresponding path program 1 times [2020-10-27 01:26:49,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:26:49,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246506603] [2020-10-27 01:26:49,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:26:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:49,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:49,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:50,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:50,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:51,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:54,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:54,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:26:54,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:26:54,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 01:26:54,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:54,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:26:54,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:26:54,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:26:54,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:54,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:26:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:54,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:54,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:54,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:26:54,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:54,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:26:54,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:54,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:26:54,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:26:54,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:26:54,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:54,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:26:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:54,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:54,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:54,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 01:26:54,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:54,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-27 01:26:54,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:54,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:26:54,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:26:54,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:26:54,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:54,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 01:26:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:54,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:54,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:54,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:26:54,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:54,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 01:26:54,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:54,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:26:54,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:26:54,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:26:54,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:55,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 01:26:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:55,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:55,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:55,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:55,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 01:26:55,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:26:55,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 399 [2020-10-27 01:26:55,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:55,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:26:55,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:26:55,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:26:55,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:55,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:26:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:55,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:55,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:55,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:26:55,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:55,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 01:26:55,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:55,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:26:55,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:26:55,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:26:55,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:26:55,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246506603] [2020-10-27 01:26:55,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:26:55,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:26:55,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393626634] [2020-10-27 01:26:55,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:26:55,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:26:55,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:26:55,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=460, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:26:55,898 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 23 states. [2020-10-27 01:26:57,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:26:57,237 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-10-27 01:26:57,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:26:57,238 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2020-10-27 01:26:57,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:26:57,239 INFO L225 Difference]: With dead ends: 62 [2020-10-27 01:26:57,240 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 01:26:57,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:26:57,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 01:26:57,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2020-10-27 01:26:57,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:26:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-10-27 01:26:57,252 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 45 [2020-10-27 01:26:57,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:26:57,252 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-10-27 01:26:57,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:26:57,253 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-10-27 01:26:57,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:26:57,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:26:57,254 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 01:26:57,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:26:57,254 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:26:57,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:26:57,255 INFO L82 PathProgramCache]: Analyzing trace with hash -279819293, now seen corresponding path program 1 times [2020-10-27 01:26:57,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:26:57,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037950107] [2020-10-27 01:26:57,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:26:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:57,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:57,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:58,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:59,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:59,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:26:59,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:26:59,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2304 [2020-10-27 01:26:59,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:59,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:26:59,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:26:59,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 01:26:59,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:59,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:26:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:59,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:59,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:59,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:26:59,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:59,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:26:59,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:59,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:26:59,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:26:59,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:26:59,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:26:59,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:26:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:26:59,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:26:59,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:26:59,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 01:26:59,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:26:59,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-27 01:26:59,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:26:59,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:26:59,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:26:59,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:26:59,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:27:00,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 01:27:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:27:00,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:27:00,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:27:00,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:27:00,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:27:00,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 01:27:00,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:27:00,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:27:00,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:27:00,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:27:00,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:27:00,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 01:27:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:27:00,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:27:00,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:27:00,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 01:27:00,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:27:00,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-27 01:27:00,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:27:00,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:27:00,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:27:00,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:27:00,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:27:00,488 ERROR L253 erpolLogProxyWrapper]: Interpolant 1 not inductive [2020-10-27 01:27:00,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:27:00,612 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:851) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:155) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:256) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:150) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:378) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-10-27 01:27:00,623 INFO L168 Benchmark]: Toolchain (without parser) took 43069.96 ms. Allocated memory was 151.0 MB in the beginning and 486.5 MB in the end (delta: 335.5 MB). Free memory was 125.1 MB in the beginning and 456.3 MB in the end (delta: -331.2 MB). Peak memory consumption was 288.5 MB. Max. memory is 8.0 GB. [2020-10-27 01:27:00,624 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:27:00,631 INFO L168 Benchmark]: CACSL2BoogieTranslator took 726.22 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 101.7 MB in the end (delta: 22.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:27:00,632 INFO L168 Benchmark]: Boogie Preprocessor took 81.71 ms. Allocated memory is still 151.0 MB. Free memory was 101.7 MB in the beginning and 132.4 MB in the end (delta: -30.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 8.0 GB. [2020-10-27 01:27:00,632 INFO L168 Benchmark]: RCFGBuilder took 738.89 ms. Allocated memory is still 151.0 MB. Free memory was 132.4 MB in the beginning and 86.8 MB in the end (delta: 45.6 MB). Peak memory consumption was 45.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:27:00,633 INFO L168 Benchmark]: TraceAbstraction took 41508.03 ms. Allocated memory was 151.0 MB in the beginning and 486.5 MB in the end (delta: 335.5 MB). Free memory was 86.3 MB in the beginning and 456.3 MB in the end (delta: -370.1 MB). Peak memory consumption was 248.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:27:00,645 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 726.22 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 101.7 MB in the end (delta: 22.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 81.71 ms. Allocated memory is still 151.0 MB. Free memory was 101.7 MB in the beginning and 132.4 MB in the end (delta: -30.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 8.0 GB. * RCFGBuilder took 738.89 ms. Allocated memory is still 151.0 MB. Free memory was 132.4 MB in the beginning and 86.8 MB in the end (delta: 45.6 MB). Peak memory consumption was 45.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 41508.03 ms. Allocated memory was 151.0 MB in the beginning and 486.5 MB in the end (delta: 335.5 MB). Free memory was 86.3 MB in the beginning and 456.3 MB in the end (delta: -370.1 MB). Peak memory consumption was 248.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...