/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-ext3-properties/dll_nullified-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:15:44,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:15:44,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:15:44,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:15:44,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:15:44,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:15:44,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:15:44,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:15:44,520 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:15:44,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:15:44,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:15:44,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:15:44,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:15:44,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:15:44,538 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:15:44,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:15:44,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:15:44,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:15:44,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:15:44,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:15:44,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:15:44,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:15:44,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:15:44,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:15:44,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:15:44,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:15:44,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:15:44,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:15:44,568 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:15:44,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:15:44,570 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:15:44,571 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:15:44,572 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:15:44,572 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:15:44,574 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:15:44,574 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:15:44,575 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:15:44,575 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:15:44,576 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:15:44,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:15:44,578 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:15:44,579 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 01:15:44,609 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:15:44,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:15:44,612 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:15:44,613 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:15:44,613 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:15:44,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:15:44,613 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:15:44,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:15:44,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:15:44,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:15:44,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:15:44,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:15:44,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:15:44,616 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:15:44,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:15:44,617 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:15:44,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:15:44,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:15:44,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:15:44,619 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:15:44,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:15:44,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:15:44,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:15:44,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:15:44,620 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:15:44,620 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:15:44,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:15:44,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:15:44,620 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:15:44,621 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:15:45,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:15:45,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:15:45,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:15:45,078 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:15:45,079 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:15:45,080 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-10-27 01:15:45,166 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1cadb37eb/64b3dd9e94b14f30a066d7c479310721/FLAGa73c996e1 [2020-10-27 01:15:46,010 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:15:46,010 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-10-27 01:15:46,026 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1cadb37eb/64b3dd9e94b14f30a066d7c479310721/FLAGa73c996e1 [2020-10-27 01:15:46,209 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1cadb37eb/64b3dd9e94b14f30a066d7c479310721 [2020-10-27 01:15:46,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:15:46,229 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:15:46,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:15:46,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:15:46,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:15:46,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:15:46" (1/1) ... [2020-10-27 01:15:46,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15d99296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:46, skipping insertion in model container [2020-10-27 01:15:46,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:15:46" (1/1) ... [2020-10-27 01:15:46,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:15:46,319 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:15:46,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:15:46,673 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:15:46,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:15:46,862 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:15:46,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:46 WrapperNode [2020-10-27 01:15:46,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:15:46,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:15:46,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:15:46,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:15:46,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:46" (1/1) ... [2020-10-27 01:15:46,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:46" (1/1) ... [2020-10-27 01:15:46,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:46" (1/1) ... [2020-10-27 01:15:46,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:46" (1/1) ... [2020-10-27 01:15:46,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:46" (1/1) ... [2020-10-27 01:15:46,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:46" (1/1) ... [2020-10-27 01:15:46,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:46" (1/1) ... [2020-10-27 01:15:46,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:15:46,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:15:46,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:15:46,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:15:46,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:46" (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 01:15:47,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:15:47,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:15:47,054 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:15:47,086 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 01:15:47,086 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 01:15:47,086 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-27 01:15:47,087 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-10-27 01:15:47,087 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:15:47,087 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:15:47,087 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:15:47,087 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:15:47,087 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:15:47,088 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:15:47,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:15:47,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:15:47,088 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 01:15:47,088 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 01:15:47,089 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:15:47,089 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:15:47,089 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:15:47,089 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:15:47,089 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:15:47,089 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:15:47,089 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:15:47,089 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:15:47,090 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:15:47,090 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:15:47,090 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:15:47,090 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:15:47,090 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:15:47,090 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:15:47,090 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:15:47,091 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:15:47,091 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:15:47,091 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:15:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:15:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:15:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:15:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:15:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:15:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:15:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:15:47,093 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:15:47,093 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:15:47,093 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:15:47,093 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:15:47,093 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:15:47,093 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:15:47,093 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:15:47,094 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:15:47,094 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:15:47,094 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:15:47,094 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:15:47,094 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:15:47,095 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:15:47,095 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:15:47,095 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:15:47,095 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:15:47,095 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:15:47,096 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:15:47,096 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:15:47,096 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:15:47,096 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:15:47,096 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:15:47,097 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:15:47,097 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:15:47,097 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:15:47,097 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:15:47,097 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:15:47,097 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:15:47,098 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:15:47,098 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:15:47,098 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:15:47,098 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:15:47,098 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:15:47,098 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:15:47,099 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:15:47,099 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:15:47,099 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:15:47,099 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:15:47,099 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:15:47,099 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:15:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:15:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:15:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:15:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:15:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:15:47,101 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:15:47,101 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:15:47,101 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:15:47,101 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:15:47,101 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:15:47,101 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:15:47,102 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:15:47,102 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:15:47,102 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:15:47,102 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:15:47,102 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:15:47,102 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:15:47,103 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:15:47,103 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:15:47,103 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:15:47,103 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:15:47,103 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:15:47,103 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:15:47,104 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:15:47,104 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:15:47,104 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:15:47,104 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:15:47,104 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:15:47,104 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:15:47,105 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:15:47,105 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:15:47,105 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:15:47,105 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:15:47,105 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:15:47,105 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:15:47,106 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:15:47,106 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:15:47,106 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-27 01:15:47,106 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-10-27 01:15:47,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:15:47,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:15:47,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:15:47,107 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:15:47,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:15:47,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:15:47,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:15:47,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:15:47,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:15:47,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:15:47,693 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-27 01:15:47,878 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:15:47,879 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 01:15:47,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:15:47 BoogieIcfgContainer [2020-10-27 01:15:47,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:15:47,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:15:47,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:15:47,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:15:47,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:15:46" (1/3) ... [2020-10-27 01:15:47,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e0ec7ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:15:47, skipping insertion in model container [2020-10-27 01:15:47,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:46" (2/3) ... [2020-10-27 01:15:47,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e0ec7ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:15:47, skipping insertion in model container [2020-10-27 01:15:47,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:15:47" (3/3) ... [2020-10-27 01:15:47,892 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2020-10-27 01:15:47,905 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:15:47,911 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:15:47,926 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:15:47,955 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:15:47,955 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:15:47,956 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:15:47,956 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:15:47,956 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:15:47,956 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:15:47,956 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:15:47,956 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:15:47,978 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-10-27 01:15:47,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:15:47,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:47,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:47,989 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:48,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:48,000 INFO L82 PathProgramCache]: Analyzing trace with hash 523345448, now seen corresponding path program 1 times [2020-10-27 01:15:48,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:48,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747705923] [2020-10-27 01:15:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:48,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:48,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:48,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:48,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:48,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:15:48,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:15:48,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 623 [2020-10-27 01:15:48,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:48,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:15:48,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:15:48,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:15:48,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:15:48,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:48,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:48,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:48,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:48,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:48,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:15:48,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:48,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:48,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:48,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:48,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:49,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:15:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:49,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:49,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:49,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:49,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:15:49,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:15:49,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-27 01:15:49,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:49,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:15:49,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:49,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:15:49,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:49,179 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 01:15:49,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747705923] [2020-10-27 01:15:49,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:15:49,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 01:15:49,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602511579] [2020-10-27 01:15:49,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:15:49,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:49,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:15:49,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:15:49,208 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 8 states. [2020-10-27 01:15:49,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:49,793 INFO L93 Difference]: Finished difference Result 114 states and 169 transitions. [2020-10-27 01:15:49,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:15:49,795 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-27 01:15:49,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:49,806 INFO L225 Difference]: With dead ends: 114 [2020-10-27 01:15:49,806 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 01:15:49,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:15:49,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 01:15:49,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2020-10-27 01:15:49,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 01:15:49,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-10-27 01:15:49,861 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 22 [2020-10-27 01:15:49,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:49,862 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-10-27 01:15:49,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:15:49,862 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-10-27 01:15:49,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:15:49,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:49,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:49,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:15:49,864 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:49,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:49,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1417062500, now seen corresponding path program 1 times [2020-10-27 01:15:49,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:49,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566581280] [2020-10-27 01:15:49,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:49,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:49,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:50,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:50,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:15:50,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:50,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-27 01:15:50,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:50,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:15:50,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:15:50,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:15:50,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:50,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:50,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:50,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:50,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:50,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:50,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:15:50,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:50,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:50,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:50,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:50,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:15:50,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:15:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:50,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:50,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:50,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:15:50,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:50,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 01:15:50,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:50,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:15:50,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 01:15:50,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:15:50,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:50,184 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 01:15:50,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566581280] [2020-10-27 01:15:50,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:15:50,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 01:15:50,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122345710] [2020-10-27 01:15:50,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:15:50,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:50,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:15:50,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:15:50,188 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 7 states. [2020-10-27 01:15:50,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:50,470 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2020-10-27 01:15:50,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:15:50,471 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-27 01:15:50,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:50,472 INFO L225 Difference]: With dead ends: 62 [2020-10-27 01:15:50,473 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:15:50,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:15:50,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:15:50,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-27 01:15:50,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:15:50,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-10-27 01:15:50,483 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 22 [2020-10-27 01:15:50,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:50,483 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-10-27 01:15:50,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:15:50,484 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-10-27 01:15:50,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:15:50,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:50,485 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] [2020-10-27 01:15:50,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:15:50,485 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:50,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:50,486 INFO L82 PathProgramCache]: Analyzing trace with hash 560946724, now seen corresponding path program 1 times [2020-10-27 01:15:50,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:50,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527009067] [2020-10-27 01:15:50,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:50,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:50,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:50,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:50,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:50,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:51,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:54,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:54,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:15:54,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:15:54,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3515 [2020-10-27 01:15:54,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:54,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:15:54,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:15:54,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:15:54,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:54,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:54,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:54,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:54,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:54,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:54,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:15:54,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:54,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:54,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:54,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:54,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:54,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:15:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:54,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:54,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:54,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 01:15:54,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:54,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-27 01:15:54,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:54,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:15:54,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 01:15:54,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:15:54,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:15:54,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527009067] [2020-10-27 01:15:54,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:54,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:15:54,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565036690] [2020-10-27 01:15:54,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:15:54,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:54,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:15:54,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:15:54,258 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 8 states. [2020-10-27 01:15:54,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:54,615 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2020-10-27 01:15:54,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:15:54,616 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-27 01:15:54,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:54,618 INFO L225 Difference]: With dead ends: 67 [2020-10-27 01:15:54,619 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 01:15:54,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:15:54,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 01:15:54,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-27 01:15:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:15:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2020-10-27 01:15:54,636 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 29 [2020-10-27 01:15:54,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:54,636 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2020-10-27 01:15:54,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:15:54,636 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2020-10-27 01:15:54,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:15:54,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:54,638 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:54,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:15:54,639 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:54,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:54,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1477512026, now seen corresponding path program 1 times [2020-10-27 01:15:54,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:54,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182642927] [2020-10-27 01:15:54,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:54,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:54,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:55,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:55,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:58,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:58,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:15:58,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:15:58,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4147 [2020-10-27 01:15:58,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:58,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:15:58,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:15:58,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:15:58,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:15:58,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:58,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:58,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:58,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:58,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:58,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:58,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:15:58,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:58,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:58,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:58,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:58,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:58,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:15:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:58,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:59,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:59,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:15:59,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:59,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-27 01:15:59,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:59,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:15:59,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 01:15:59,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:15:59,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:15:59,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182642927] [2020-10-27 01:15:59,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:59,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:15:59,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808457138] [2020-10-27 01:15:59,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:15:59,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:59,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:15:59,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:15:59,189 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 9 states. [2020-10-27 01:15:59,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:59,513 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2020-10-27 01:15:59,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:15:59,514 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-27 01:15:59,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:59,516 INFO L225 Difference]: With dead ends: 74 [2020-10-27 01:15:59,516 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:15:59,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:15:59,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:15:59,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2020-10-27 01:15:59,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:15:59,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2020-10-27 01:15:59,530 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 36 [2020-10-27 01:15:59,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:59,530 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2020-10-27 01:15:59,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:15:59,530 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2020-10-27 01:15:59,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:15:59,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:59,535 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:59,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:15:59,536 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:59,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:59,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1429432292, now seen corresponding path program 2 times [2020-10-27 01:15:59,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:59,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654379788] [2020-10-27 01:15:59,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:59,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:59,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:59,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:00,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:04,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:04,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:16:04,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:16:04,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 01:16:04,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:04,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:16:04,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:16:04,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:16:04,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:04,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:04,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:04,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:04,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:04,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:04,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:16:04,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:04,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:04,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:04,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:04,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:04,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:16:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:04,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:04,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:04,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:16:04,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:04,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-27 01:16:04,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:04,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:16:04,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 01:16:04,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:16:04,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:16:05,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654379788] [2020-10-27 01:16:05,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:05,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:16:05,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262864543] [2020-10-27 01:16:05,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:16:05,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:05,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:16:05,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:16:05,052 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 10 states. [2020-10-27 01:16:05,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:05,365 INFO L93 Difference]: Finished difference Result 81 states and 104 transitions. [2020-10-27 01:16:05,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:16:05,367 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-27 01:16:05,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:05,370 INFO L225 Difference]: With dead ends: 81 [2020-10-27 01:16:05,370 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 01:16:05,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:16:05,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 01:16:05,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-10-27 01:16:05,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 01:16:05,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-10-27 01:16:05,387 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 43 [2020-10-27 01:16:05,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:05,387 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-10-27 01:16:05,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:16:05,388 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-10-27 01:16:05,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:16:05,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:05,392 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 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 01:16:05,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:16:05,393 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:05,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:05,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1126200038, now seen corresponding path program 3 times [2020-10-27 01:16:05,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:05,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78712864] [2020-10-27 01:16:05,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:05,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:05,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:06,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:09,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:10,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:10,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:16:10,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:16:10,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 01:16:10,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:10,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:16:10,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:16:10,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:16:10,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:16:10,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:10,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:10,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:10,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:10,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:10,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:16:10,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:10,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:10,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:10,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:10,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:10,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:16:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:10,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:10,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:10,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:16:10,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:10,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-27 01:16:10,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:10,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:16:10,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 01:16:10,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:16:10,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:16:11,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78712864] [2020-10-27 01:16:11,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:11,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:16:11,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176061956] [2020-10-27 01:16:11,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:16:11,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:11,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:16:11,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:16:11,037 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 11 states. [2020-10-27 01:16:11,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:11,332 INFO L93 Difference]: Finished difference Result 88 states and 113 transitions. [2020-10-27 01:16:11,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:16:11,333 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-10-27 01:16:11,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:11,337 INFO L225 Difference]: With dead ends: 88 [2020-10-27 01:16:11,337 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 01:16:11,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:16:11,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 01:16:11,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2020-10-27 01:16:11,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 01:16:11,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2020-10-27 01:16:11,353 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 50 [2020-10-27 01:16:11,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:11,353 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2020-10-27 01:16:11,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:16:11,354 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2020-10-27 01:16:11,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:16:11,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:11,357 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 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 01:16:11,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:16:11,357 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:11,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:11,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1119657564, now seen corresponding path program 4 times [2020-10-27 01:16:11,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:11,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567368456] [2020-10-27 01:16:11,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:11,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:11,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:12,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:14,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:14,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:16:14,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:16:14,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3285 [2020-10-27 01:16:14,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:14,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:16:14,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 01:16:14,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:16:14,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:14,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:14,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:14,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:14,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:14,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:14,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:16:14,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:14,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:14,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:14,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:14,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:14,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:16:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:14,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:15,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:15,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:16:15,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:15,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 591 [2020-10-27 01:16:15,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:15,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:16:15,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:15,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:16:15,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:15,684 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-27 01:16:15,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567368456] [2020-10-27 01:16:15,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:15,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:16:15,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101215408] [2020-10-27 01:16:15,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:16:15,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:15,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:16:15,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:16:15,687 INFO L87 Difference]: Start difference. First operand 63 states and 79 transitions. Second operand 15 states. [2020-10-27 01:16:16,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:16,358 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2020-10-27 01:16:16,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:16:16,358 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-10-27 01:16:16,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:16,360 INFO L225 Difference]: With dead ends: 90 [2020-10-27 01:16:16,360 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 01:16:16,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:16:16,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 01:16:16,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2020-10-27 01:16:16,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 01:16:16,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2020-10-27 01:16:16,370 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 57 [2020-10-27 01:16:16,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:16,370 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2020-10-27 01:16:16,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:16:16,370 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2020-10-27 01:16:16,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:16:16,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:16,372 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 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 01:16:16,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:16:16,372 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:16,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:16,372 INFO L82 PathProgramCache]: Analyzing trace with hash 655349798, now seen corresponding path program 1 times [2020-10-27 01:16:16,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:16,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061228218] [2020-10-27 01:16:16,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:16,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:17,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:17,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:17,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:16:17,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:16:17,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1526 [2020-10-27 01:16:17,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:17,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:16:17,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 01:16:17,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:16:17,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:18,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:18,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:18,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:18,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:18,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:18,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:16:18,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:18,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:18,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:18,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:18,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:18,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:16:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:18,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:18,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:18,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:16:18,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:18,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 595 [2020-10-27 01:16:18,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:18,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:16:18,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:18,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:16:18,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:16:18,978 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-27 01:16:18,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061228218] [2020-10-27 01:16:18,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:18,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:16:18,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713278727] [2020-10-27 01:16:18,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:16:18,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:18,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:16:18,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:16:18,981 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 15 states. [2020-10-27 01:16:19,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:19,870 INFO L93 Difference]: Finished difference Result 90 states and 118 transitions. [2020-10-27 01:16:19,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:16:19,871 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-10-27 01:16:19,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:19,872 INFO L225 Difference]: With dead ends: 90 [2020-10-27 01:16:19,872 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 01:16:19,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:16:19,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 01:16:19,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2020-10-27 01:16:19,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 01:16:19,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2020-10-27 01:16:19,896 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 57 [2020-10-27 01:16:19,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:19,897 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2020-10-27 01:16:19,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:16:19,897 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2020-10-27 01:16:19,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:16:19,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:19,899 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 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 01:16:19,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:16:19,900 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:19,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:19,900 INFO L82 PathProgramCache]: Analyzing trace with hash 657196840, now seen corresponding path program 1 times [2020-10-27 01:16:19,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:19,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768801876] [2020-10-27 01:16:19,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 01:16:19,949 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 01:16:19,949 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 01:16:19,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:16:19,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:16:19 BoogieIcfgContainer [2020-10-27 01:16:19,989 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:16:19,999 INFO L168 Benchmark]: Toolchain (without parser) took 33770.16 ms. Allocated memory was 152.0 MB in the beginning and 704.6 MB in the end (delta: 552.6 MB). Free memory was 125.6 MB in the beginning and 401.5 MB in the end (delta: -275.9 MB). Peak memory consumption was 278.2 MB. Max. memory is 8.0 GB. [2020-10-27 01:16:20,000 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 152.0 MB. Free memory is still 123.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:16:20,002 INFO L168 Benchmark]: CACSL2BoogieTranslator took 629.46 ms. Allocated memory is still 152.0 MB. Free memory was 125.1 MB in the beginning and 102.9 MB in the end (delta: 22.2 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:16:20,002 INFO L168 Benchmark]: Boogie Preprocessor took 89.54 ms. Allocated memory is still 152.0 MB. Free memory was 102.9 MB in the beginning and 100.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:16:20,003 INFO L168 Benchmark]: RCFGBuilder took 926.53 ms. Allocated memory is still 152.0 MB. Free memory was 100.1 MB in the beginning and 93.4 MB in the end (delta: 6.7 MB). Peak memory consumption was 7.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:16:20,007 INFO L168 Benchmark]: TraceAbstraction took 32106.18 ms. Allocated memory was 152.0 MB in the beginning and 704.6 MB in the end (delta: 552.6 MB). Free memory was 92.9 MB in the beginning and 401.5 MB in the end (delta: -308.7 MB). Peak memory consumption was 243.9 MB. Max. memory is 8.0 GB. [2020-10-27 01:16:20,013 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 152.0 MB. Free memory is still 123.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 629.46 ms. Allocated memory is still 152.0 MB. Free memory was 125.1 MB in the beginning and 102.9 MB in the end (delta: 22.2 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 89.54 ms. Allocated memory is still 152.0 MB. Free memory was 102.9 MB in the beginning and 100.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 926.53 ms. Allocated memory is still 152.0 MB. Free memory was 100.1 MB in the beginning and 93.4 MB in the end (delta: 6.7 MB). Peak memory consumption was 7.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 32106.18 ms. Allocated memory was 152.0 MB in the beginning and 704.6 MB in the end (delta: 552.6 MB). Free memory was 92.9 MB in the beginning and 401.5 MB in the end (delta: -308.7 MB). Peak memory consumption was 243.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L599] const int len = 5; [L600] CALL, EXPR dll_create(len) [L579] DLL head = ((void *)0); [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND FALSE !(\read(head)) [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND FALSE !(len > 0) [L596] return head; [L600] RET, EXPR dll_create(len) [L600] DLL head = dll_create(len); [L601] head->next [L601] COND TRUE head->next [L602] EXPR head->data_0 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 [L602] EXPR head->data_1 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L602] EXPR head->data_2 [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L602] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L616] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "dll_nullified-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 52 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 32.0s, OverallIterations: 9, TraceHistogramMax: 5, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 287 SDtfs, 468 SDslu, 1288 SDs, 0 SdLazy, 1599 SolverSat, 117 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 150 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 59 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 27.4s InterpolantComputationTime, 373 NumberOfCodeBlocks, 373 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 308 ConstructedInterpolants, 0 QuantifiedInterpolants, 55573 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 136/230 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...