/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:55:03,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:55:03,507 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:55:03,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:55:03,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:55:03,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:55:03,546 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:55:03,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:55:03,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:55:03,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:55:03,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:55:03,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:55:03,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:55:03,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:55:03,563 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:55:03,565 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:55:03,567 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:55:03,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:55:03,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:55:03,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:55:03,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:55:03,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:55:03,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:55:03,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:55:03,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 17:55:03,595 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 17:55:03,595 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 17:55:03,596 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 17:55:03,596 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 17:55:03,600 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 17:55:03,600 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 17:55:03,602 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 17:55:03,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 17:55:03,603 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 17:55:03,604 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 17:55:03,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 17:55:03,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 17:55:03,605 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 17:55:03,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:55:03,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:55:03,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:55:03,608 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 [2020-08-18 17:55:03,653 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:55:03,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:55:03,655 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:55:03,655 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:55:03,655 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:55:03,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:55:03,656 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:55:03,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:55:03,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:55:03,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:55:03,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:55:03,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:55:03,658 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:55:03,658 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:55:03,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:55:03,659 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:55:03,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:55:03,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:55:03,659 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:55:03,659 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:55:03,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:55:03,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:55:03,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:55:03,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:55:03,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:55:03,661 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:55:03,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:55:03,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:55:03,661 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:55:03,661 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 17:55:03,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:55:03,959 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:55:03,963 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:55:03,965 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:55:03,965 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:55:03,966 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-08-18 17:55:04,046 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aac422cdb/8faccb482d4548c89b70eb2df22e1900/FLAGf4ddc0074 [2020-08-18 17:55:04,588 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:55:04,589 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-08-18 17:55:04,601 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aac422cdb/8faccb482d4548c89b70eb2df22e1900/FLAGf4ddc0074 [2020-08-18 17:55:04,846 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aac422cdb/8faccb482d4548c89b70eb2df22e1900 [2020-08-18 17:55:04,858 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:55:04,860 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:55:04,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:55:04,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:55:04,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:55:04,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:55:04" (1/1) ... [2020-08-18 17:55:04,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dceca50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:55:04, skipping insertion in model container [2020-08-18 17:55:04,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:55:04" (1/1) ... [2020-08-18 17:55:04,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:55:04,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:55:05,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:55:05,445 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:55:05,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:55:05,575 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:55:05,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:55:05 WrapperNode [2020-08-18 17:55:05,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:55:05,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:55:05,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:55:05,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:55:05,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:55:05" (1/1) ... [2020-08-18 17:55:05,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:55:05" (1/1) ... [2020-08-18 17:55:05,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:55:05" (1/1) ... [2020-08-18 17:55:05,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:55:05" (1/1) ... [2020-08-18 17:55:05,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:55:05" (1/1) ... [2020-08-18 17:55:05,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:55:05" (1/1) ... [2020-08-18 17:55:05,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:55:05" (1/1) ... [2020-08-18 17:55:05,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:55:05,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:55:05,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:55:05,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:55:05,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:55:05" (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 [2020-08-18 17:55:05,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:55:05,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:55:05,785 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-18 17:55:05,785 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-18 17:55:05,785 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-18 17:55:05,786 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-08-18 17:55:05,786 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-08-18 17:55:05,786 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-08-18 17:55:05,787 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:55:05,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:55:05,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:55:05,788 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-18 17:55:05,788 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-18 17:55:05,788 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-18 17:55:05,789 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-18 17:55:05,790 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-18 17:55:05,790 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-18 17:55:05,790 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-18 17:55:05,790 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-18 17:55:05,790 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-18 17:55:05,791 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-18 17:55:05,791 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-18 17:55:05,791 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-18 17:55:05,791 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-18 17:55:05,792 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-18 17:55:05,792 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-18 17:55:05,792 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-18 17:55:05,793 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-18 17:55:05,793 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-18 17:55:05,793 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-18 17:55:05,793 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-18 17:55:05,794 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-18 17:55:05,794 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-18 17:55:05,794 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-18 17:55:05,794 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-18 17:55:05,794 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-18 17:55:05,794 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-18 17:55:05,794 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-18 17:55:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-18 17:55:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-18 17:55:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-18 17:55:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-18 17:55:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-18 17:55:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-18 17:55:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-18 17:55:05,796 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-18 17:55:05,796 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-18 17:55:05,796 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-18 17:55:05,796 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-18 17:55:05,796 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-18 17:55:05,796 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-18 17:55:05,796 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-18 17:55:05,796 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-18 17:55:05,797 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-18 17:55:05,797 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-18 17:55:05,797 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-18 17:55:05,797 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-18 17:55:05,798 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-18 17:55:05,798 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-18 17:55:05,798 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-18 17:55:05,798 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-18 17:55:05,798 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-18 17:55:05,799 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-18 17:55:05,799 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 17:55:05,799 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 17:55:05,799 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-18 17:55:05,799 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 17:55:05,800 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-18 17:55:05,800 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-18 17:55:05,800 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-18 17:55:05,801 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-18 17:55:05,801 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-18 17:55:05,801 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 17:55:05,802 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-18 17:55:05,802 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-18 17:55:05,803 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-18 17:55:05,803 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 17:55:05,804 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-18 17:55:05,804 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-18 17:55:05,804 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-18 17:55:05,804 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-18 17:55:05,804 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-18 17:55:05,804 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-18 17:55:05,805 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-18 17:55:05,805 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-18 17:55:05,806 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-18 17:55:05,806 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-18 17:55:05,806 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-18 17:55:05,806 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-18 17:55:05,806 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-18 17:55:05,806 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-18 17:55:05,807 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-18 17:55:05,807 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-18 17:55:05,807 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-18 17:55:05,807 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-18 17:55:05,807 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-18 17:55:05,807 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-18 17:55:05,807 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-18 17:55:05,808 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-18 17:55:05,808 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-18 17:55:05,808 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-18 17:55:05,808 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-18 17:55:05,808 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-18 17:55:05,808 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-18 17:55:05,809 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-18 17:55:05,809 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-18 17:55:05,809 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-18 17:55:05,809 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-18 17:55:05,809 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-18 17:55:05,809 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-18 17:55:05,809 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-18 17:55:05,810 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-18 17:55:05,810 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-18 17:55:05,810 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-18 17:55:05,810 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-18 17:55:05,810 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-18 17:55:05,811 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-18 17:55:05,812 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-08-18 17:55:05,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 17:55:05,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 17:55:05,812 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-08-18 17:55:05,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 17:55:05,813 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-08-18 17:55:05,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 17:55:05,813 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:55:05,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:55:05,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:55:06,238 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-18 17:55:06,377 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:55:06,377 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-18 17:55:06,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:55:06 BoogieIcfgContainer [2020-08-18 17:55:06,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:55:06,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:55:06,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:55:06,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:55:06,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:55:04" (1/3) ... [2020-08-18 17:55:06,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d38aa3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:55:06, skipping insertion in model container [2020-08-18 17:55:06,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:55:05" (2/3) ... [2020-08-18 17:55:06,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d38aa3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:55:06, skipping insertion in model container [2020-08-18 17:55:06,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:55:06" (3/3) ... [2020-08-18 17:55:06,390 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2020-08-18 17:55:06,401 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:55:06,410 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:55:06,426 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:55:06,454 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:55:06,454 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:55:06,455 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:55:06,455 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:55:06,455 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:55:06,456 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:55:06,456 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:55:06,456 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:55:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-18 17:55:06,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 17:55:06,484 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:55:06,485 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] [2020-08-18 17:55:06,486 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:55:06,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:55:06,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1666427650, now seen corresponding path program 1 times [2020-08-18 17:55:06,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:55:06,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896866072] [2020-08-18 17:55:06,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:55:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:06,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:55:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:06,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:55:06,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:06,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 17:55:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:55:06,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896866072] [2020-08-18 17:55:06,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:55:06,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:55:06,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736822267] [2020-08-18 17:55:06,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:55:06,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:55:06,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:55:06,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:55:06,841 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 4 states. [2020-08-18 17:55:07,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:55:07,053 INFO L93 Difference]: Finished difference Result 90 states and 120 transitions. [2020-08-18 17:55:07,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:55:07,056 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-08-18 17:55:07,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:55:07,066 INFO L225 Difference]: With dead ends: 90 [2020-08-18 17:55:07,066 INFO L226 Difference]: Without dead ends: 38 [2020-08-18 17:55:07,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:55:07,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-18 17:55:07,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-08-18 17:55:07,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-18 17:55:07,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-08-18 17:55:07,127 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-08-18 17:55:07,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:55:07,128 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-08-18 17:55:07,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:55:07,128 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-08-18 17:55:07,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 17:55:07,130 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:55:07,130 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] [2020-08-18 17:55:07,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:55:07,131 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:55:07,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:55:07,132 INFO L82 PathProgramCache]: Analyzing trace with hash -29727073, now seen corresponding path program 1 times [2020-08-18 17:55:07,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:55:07,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203796572] [2020-08-18 17:55:07,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:55:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:07,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:55:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:07,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:55:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:07,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 17:55:07,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:55:07,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203796572] [2020-08-18 17:55:07,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:55:07,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 17:55:07,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537864921] [2020-08-18 17:55:07,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 17:55:07,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:55:07,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 17:55:07,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:55:07,310 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-08-18 17:55:07,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:55:07,526 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-08-18 17:55:07,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 17:55:07,527 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-18 17:55:07,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:55:07,528 INFO L225 Difference]: With dead ends: 45 [2020-08-18 17:55:07,528 INFO L226 Difference]: Without dead ends: 31 [2020-08-18 17:55:07,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:55:07,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-18 17:55:07,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-08-18 17:55:07,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-18 17:55:07,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-08-18 17:55:07,538 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2020-08-18 17:55:07,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:55:07,538 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-08-18 17:55:07,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 17:55:07,538 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-08-18 17:55:07,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 17:55:07,539 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:55:07,540 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] [2020-08-18 17:55:07,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:55:07,540 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:55:07,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:55:07,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1680455870, now seen corresponding path program 1 times [2020-08-18 17:55:07,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:55:07,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795675802] [2020-08-18 17:55:07,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:55:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:07,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:55:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:07,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:55:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:07,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:55:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:07,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:55:07,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795675802] [2020-08-18 17:55:07,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:55:07,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 17:55:07,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222340294] [2020-08-18 17:55:07,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:55:07,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:55:07,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:55:07,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:55:07,677 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 8 states. [2020-08-18 17:55:07,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:55:07,865 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-08-18 17:55:07,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 17:55:07,866 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-08-18 17:55:07,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:55:07,867 INFO L225 Difference]: With dead ends: 48 [2020-08-18 17:55:07,867 INFO L226 Difference]: Without dead ends: 34 [2020-08-18 17:55:07,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-08-18 17:55:07,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-18 17:55:07,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-18 17:55:07,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 17:55:07,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-08-18 17:55:07,876 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 28 [2020-08-18 17:55:07,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:55:07,876 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-08-18 17:55:07,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:55:07,877 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-08-18 17:55:07,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 17:55:07,878 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:55:07,878 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:55:07,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:55:07,879 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:55:07,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:55:07,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1166508097, now seen corresponding path program 2 times [2020-08-18 17:55:07,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:55:07,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007996669] [2020-08-18 17:55:07,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:55:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:07,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:55:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:07,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:55:07,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:08,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 17:55:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:55:08,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007996669] [2020-08-18 17:55:08,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:55:08,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 17:55:08,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823397023] [2020-08-18 17:55:08,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 17:55:08,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:55:08,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 17:55:08,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:55:08,027 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 9 states. [2020-08-18 17:55:08,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:55:08,236 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-08-18 17:55:08,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 17:55:08,237 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-08-18 17:55:08,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:55:08,238 INFO L225 Difference]: With dead ends: 51 [2020-08-18 17:55:08,238 INFO L226 Difference]: Without dead ends: 37 [2020-08-18 17:55:08,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-08-18 17:55:08,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-18 17:55:08,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-08-18 17:55:08,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-18 17:55:08,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-08-18 17:55:08,246 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 31 [2020-08-18 17:55:08,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:55:08,246 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-08-18 17:55:08,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 17:55:08,246 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-08-18 17:55:08,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 17:55:08,247 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:55:08,248 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:55:08,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:55:08,248 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:55:08,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:55:08,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1706812894, now seen corresponding path program 3 times [2020-08-18 17:55:08,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:55:08,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561499823] [2020-08-18 17:55:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:55:08,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:08,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:55:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:08,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:55:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:08,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-18 17:55:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 17:55:08,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561499823] [2020-08-18 17:55:08,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:55:08,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 17:55:08,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117380047] [2020-08-18 17:55:08,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 17:55:08,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:55:08,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 17:55:08,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:55:08,413 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 11 states. [2020-08-18 17:55:08,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:55:08,686 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-08-18 17:55:08,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 17:55:08,686 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-08-18 17:55:08,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:55:08,689 INFO L225 Difference]: With dead ends: 43 [2020-08-18 17:55:08,689 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 17:55:08,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-08-18 17:55:08,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 17:55:08,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-18 17:55:08,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 17:55:08,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-08-18 17:55:08,699 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 34 [2020-08-18 17:55:08,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:55:08,700 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-08-18 17:55:08,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 17:55:08,700 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-08-18 17:55:08,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-18 17:55:08,701 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:55:08,701 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:55:08,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:55:08,701 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:55:08,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:55:08,701 INFO L82 PathProgramCache]: Analyzing trace with hash 991320762, now seen corresponding path program 1 times [2020-08-18 17:55:08,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:55:08,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980476753] [2020-08-18 17:55:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:55:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:08,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:55:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:08,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:55:08,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:08,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-18 17:55:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 17:55:08,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980476753] [2020-08-18 17:55:08,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:55:08,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 17:55:08,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542419331] [2020-08-18 17:55:08,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 17:55:08,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:55:08,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 17:55:08,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-18 17:55:08,952 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 14 states. [2020-08-18 17:55:09,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:55:09,330 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-08-18 17:55:09,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 17:55:09,331 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-08-18 17:55:09,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:55:09,332 INFO L225 Difference]: With dead ends: 44 [2020-08-18 17:55:09,332 INFO L226 Difference]: Without dead ends: 37 [2020-08-18 17:55:09,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-08-18 17:55:09,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-18 17:55:09,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-08-18 17:55:09,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-18 17:55:09,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-08-18 17:55:09,339 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 35 [2020-08-18 17:55:09,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:55:09,340 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-08-18 17:55:09,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 17:55:09,340 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-08-18 17:55:09,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-18 17:55:09,341 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:55:09,341 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-08-18 17:55:09,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:55:09,341 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:55:09,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:55:09,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1265881822, now seen corresponding path program 2 times [2020-08-18 17:55:09,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:55:09,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037149302] [2020-08-18 17:55:09,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:55:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:09,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:55:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:09,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:55:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:09,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-18 17:55:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:55:09,515 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-18 17:55:09,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037149302] [2020-08-18 17:55:09,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:55:09,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 17:55:09,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399945590] [2020-08-18 17:55:09,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 17:55:09,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:55:09,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 17:55:09,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:55:09,517 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 10 states. [2020-08-18 17:55:09,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:55:09,860 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-08-18 17:55:09,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 17:55:09,861 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-08-18 17:55:09,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:55:09,864 INFO L225 Difference]: With dead ends: 55 [2020-08-18 17:55:09,865 INFO L226 Difference]: Without dead ends: 51 [2020-08-18 17:55:09,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-08-18 17:55:09,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-18 17:55:09,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-08-18 17:55:09,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-18 17:55:09,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-08-18 17:55:09,888 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 36 [2020-08-18 17:55:09,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:55:09,888 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-08-18 17:55:09,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 17:55:09,888 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-08-18 17:55:09,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 17:55:09,891 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:55:09,891 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:55:09,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:55:09,891 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:55:09,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:55:09,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1775282106, now seen corresponding path program 3 times [2020-08-18 17:55:09,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:55:09,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868971672] [2020-08-18 17:55:09,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:55:09,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 17:55:09,913 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 17:55:09,914 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 17:55:09,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:55:09,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:55:09 BoogieIcfgContainer [2020-08-18 17:55:09,937 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:55:09,940 INFO L168 Benchmark]: Toolchain (without parser) took 5079.77 ms. Allocated memory was 141.6 MB in the beginning and 272.1 MB in the end (delta: 130.5 MB). Free memory was 102.6 MB in the beginning and 219.6 MB in the end (delta: -117.0 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-08-18 17:55:09,941 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 17:55:09,942 INFO L168 Benchmark]: CACSL2BoogieTranslator took 712.16 ms. Allocated memory was 141.6 MB in the beginning and 206.0 MB in the end (delta: 64.5 MB). Free memory was 102.2 MB in the beginning and 173.1 MB in the end (delta: -70.8 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-08-18 17:55:09,943 INFO L168 Benchmark]: Boogie Preprocessor took 128.70 ms. Allocated memory is still 206.0 MB. Free memory was 173.1 MB in the beginning and 169.9 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. [2020-08-18 17:55:09,944 INFO L168 Benchmark]: RCFGBuilder took 675.80 ms. Allocated memory is still 206.0 MB. Free memory was 169.9 MB in the beginning and 127.0 MB in the end (delta: 42.9 MB). Peak memory consumption was 42.9 MB. Max. memory is 7.1 GB. [2020-08-18 17:55:09,944 INFO L168 Benchmark]: TraceAbstraction took 3554.49 ms. Allocated memory was 206.0 MB in the beginning and 272.1 MB in the end (delta: 66.1 MB). Free memory was 126.4 MB in the beginning and 219.6 MB in the end (delta: -93.3 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 17:55:09,948 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 712.16 ms. Allocated memory was 141.6 MB in the beginning and 206.0 MB in the end (delta: 64.5 MB). Free memory was 102.2 MB in the beginning and 173.1 MB in the end (delta: -70.8 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.70 ms. Allocated memory is still 206.0 MB. Free memory was 173.1 MB in the beginning and 169.9 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 675.80 ms. Allocated memory is still 206.0 MB. Free memory was 169.9 MB in the beginning and 127.0 MB in the end (delta: 42.9 MB). Peak memory consumption was 42.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3554.49 ms. Allocated memory was 206.0 MB in the beginning and 272.1 MB in the end (delta: 66.1 MB). Free memory was 126.4 MB in the beginning and 219.6 MB in the end (delta: -93.3 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L592] int len = 2; [L593] len < 32 && __VERIFIER_nondet_int() [L593] len < 32 && __VERIFIER_nondet_int() [L593] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L596] CALL, EXPR sll_create(len + 1) [L564] SLL head = ((void *)0); [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND FALSE !(len > 0) [L574] return head; [L596] RET, EXPR sll_create(len + 1) [L596] SLL s = sll_create(len + 1); [L597] CALL, EXPR sll_length(s) [L577] int len = 0; [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND FALSE !(\read(head)) [L582] return len; [L597] RET, EXPR sll_length(s) [L597] COND TRUE len != sll_length(s) [L602] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.4s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 183 SDtfs, 300 SDslu, 499 SDs, 0 SdLazy, 896 SolverSat, 94 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 129 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 20 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 249 NumberOfCodeBlocks, 249 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 205 ConstructedInterpolants, 0 QuantifiedInterpolants, 20626 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 33/46 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...