/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=SMALLEST -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 17:06:43,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:06:43,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:06:43,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:06:43,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:06:43,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:06:43,578 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:06:43,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:06:43,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:06:43,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:06:43,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:06:43,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:06:43,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:06:43,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:06:43,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:06:43,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:06:43,597 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:06:43,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:06:43,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:06:43,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:06:43,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:06:43,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:06:43,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:06:43,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:06:43,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 17:06:43,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 17:06:43,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 17:06:43,621 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 17:06:43,622 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 17:06:43,622 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 17:06:43,626 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 17:06:43,627 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 17:06:43,627 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 17:06:43,628 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 17:06:43,629 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 17:06:43,629 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 17:06:43,630 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 17:06:43,630 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 17:06:43,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:06:43,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:06:43,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:06:43,632 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 17:06:43,654 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:06:43,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:06:43,655 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:06:43,655 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:06:43,656 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:06:43,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:06:43,656 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:06:43,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:06:43,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:06:43,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:06:43,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:06:43,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:06:43,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:06:43,657 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:06:43,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:06:43,658 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:06:43,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:06:43,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:06:43,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:06:43,658 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:06:43,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:06:43,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:06:43,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:06:43,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:06:43,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:06:43,660 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:06:43,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:06:43,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:06:43,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:06:43,660 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=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 17:06:43,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:06:43,997 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:06:44,001 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:06:44,003 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:06:44,003 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:06:44,004 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-08-18 17:06:44,082 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/febcd5ff8/442b91978dfd400fac7d41e867743d3f/FLAG431a41b04 [2020-08-18 17:06:44,612 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:06:44,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-08-18 17:06:44,636 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/febcd5ff8/442b91978dfd400fac7d41e867743d3f/FLAG431a41b04 [2020-08-18 17:06:44,971 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/febcd5ff8/442b91978dfd400fac7d41e867743d3f [2020-08-18 17:06:44,980 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:06:44,981 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:06:44,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:06:44,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:06:44,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:06:44,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:06:44" (1/1) ... [2020-08-18 17:06:44,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@770ea115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:06:44, skipping insertion in model container [2020-08-18 17:06:44,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:06:44" (1/1) ... [2020-08-18 17:06:44,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:06:45,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:06:45,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:06:45,501 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:06:45,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:06:45,639 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:06:45,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:06:45 WrapperNode [2020-08-18 17:06:45,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:06:45,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:06:45,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:06:45,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:06:45,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:06:45" (1/1) ... [2020-08-18 17:06:45,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:06:45" (1/1) ... [2020-08-18 17:06:45,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:06:45" (1/1) ... [2020-08-18 17:06:45,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:06:45" (1/1) ... [2020-08-18 17:06:45,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:06:45" (1/1) ... [2020-08-18 17:06:45,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:06:45" (1/1) ... [2020-08-18 17:06:45,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:06:45" (1/1) ... [2020-08-18 17:06:45,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:06:45,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:06:45,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:06:45,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:06:45,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:06:45" (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 17:06:45,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:06:45,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:06:45,788 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-18 17:06:45,789 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-18 17:06:45,789 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-18 17:06:45,789 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-08-18 17:06:45,789 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-08-18 17:06:45,789 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-08-18 17:06:45,789 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:06:45,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:06:45,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:06:45,790 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-18 17:06:45,790 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-18 17:06:45,790 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-18 17:06:45,790 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-18 17:06:45,791 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-18 17:06:45,791 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-18 17:06:45,791 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-18 17:06:45,791 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-18 17:06:45,791 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-18 17:06:45,792 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-18 17:06:45,792 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-18 17:06:45,792 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-18 17:06:45,792 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-18 17:06:45,792 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-18 17:06:45,792 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-18 17:06:45,793 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-18 17:06:45,793 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-18 17:06:45,793 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-18 17:06:45,793 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-18 17:06:45,793 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-18 17:06:45,793 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-18 17:06:45,794 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-18 17:06:45,794 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-18 17:06:45,794 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-18 17:06:45,794 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-18 17:06:45,794 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-18 17:06:45,794 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-18 17:06:45,795 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-18 17:06:45,795 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-18 17:06:45,795 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-18 17:06:45,795 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-18 17:06:45,795 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-18 17:06:45,795 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-18 17:06:45,796 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-18 17:06:45,796 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-18 17:06:45,796 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-18 17:06:45,796 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-18 17:06:45,796 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-18 17:06:45,796 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-18 17:06:45,796 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-18 17:06:45,797 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-18 17:06:45,797 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-18 17:06:45,797 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-18 17:06:45,797 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-18 17:06:45,797 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-18 17:06:45,797 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-18 17:06:45,798 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-18 17:06:45,798 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-18 17:06:45,798 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-18 17:06:45,798 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-18 17:06:45,798 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-18 17:06:45,798 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-18 17:06:45,798 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 17:06:45,799 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 17:06:45,799 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-18 17:06:45,799 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 17:06:45,799 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-18 17:06:45,799 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-18 17:06:45,799 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-18 17:06:45,800 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-18 17:06:45,800 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-18 17:06:45,800 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 17:06:45,800 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-18 17:06:45,800 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-18 17:06:45,800 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-18 17:06:45,800 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 17:06:45,801 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-18 17:06:45,801 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-18 17:06:45,801 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-18 17:06:45,801 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-18 17:06:45,801 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-18 17:06:45,801 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-18 17:06:45,802 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-18 17:06:45,802 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-18 17:06:45,802 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-18 17:06:45,802 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-18 17:06:45,802 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-18 17:06:45,802 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-18 17:06:45,803 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-18 17:06:45,803 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-18 17:06:45,803 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-18 17:06:45,803 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-18 17:06:45,803 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-18 17:06:45,803 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-18 17:06:45,803 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-18 17:06:45,804 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-18 17:06:45,804 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-18 17:06:45,804 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-18 17:06:45,804 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-18 17:06:45,804 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-18 17:06:45,804 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-18 17:06:45,804 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-18 17:06:45,805 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-18 17:06:45,805 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-18 17:06:45,805 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-18 17:06:45,805 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-18 17:06:45,805 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-18 17:06:45,805 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-18 17:06:45,805 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-18 17:06:45,806 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-18 17:06:45,806 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-18 17:06:45,806 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-18 17:06:45,806 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-18 17:06:45,806 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-18 17:06:45,806 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-18 17:06:45,806 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-18 17:06:45,807 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-08-18 17:06:45,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 17:06:45,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 17:06:45,807 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-08-18 17:06:45,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 17:06:45,807 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-08-18 17:06:45,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 17:06:45,808 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:06:45,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:06:45,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:06:46,191 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-18 17:06:46,343 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:06:46,344 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-18 17:06:46,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:06:46 BoogieIcfgContainer [2020-08-18 17:06:46,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:06:46,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:06:46,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:06:46,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:06:46,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:06:44" (1/3) ... [2020-08-18 17:06:46,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a67b95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:06:46, skipping insertion in model container [2020-08-18 17:06:46,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:06:45" (2/3) ... [2020-08-18 17:06:46,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a67b95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:06:46, skipping insertion in model container [2020-08-18 17:06:46,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:06:46" (3/3) ... [2020-08-18 17:06:46,358 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2020-08-18 17:06:46,370 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:06:46,379 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:06:46,395 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:06:46,422 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:06:46,422 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:06:46,423 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:06:46,423 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:06:46,423 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:06:46,424 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:06:46,424 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:06:46,424 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:06:46,448 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-18 17:06:46,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 17:06:46,456 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:06:46,457 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 17:06:46,458 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:06:46,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:06:46,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1666427650, now seen corresponding path program 1 times [2020-08-18 17:06:46,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:06:46,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679511617] [2020-08-18 17:06:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:06:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:46,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:06:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:46,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:06:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:46,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 17:06:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:46,726 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 17:06:46,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679511617] [2020-08-18 17:06:46,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:06:46,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:06:46,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306167523] [2020-08-18 17:06:46,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:06:46,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:06:46,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:06:46,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:06:46,753 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 4 states. [2020-08-18 17:06:47,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:06:47,002 INFO L93 Difference]: Finished difference Result 90 states and 120 transitions. [2020-08-18 17:06:47,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:06:47,005 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-08-18 17:06:47,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:06:47,014 INFO L225 Difference]: With dead ends: 90 [2020-08-18 17:06:47,014 INFO L226 Difference]: Without dead ends: 38 [2020-08-18 17:06:47,019 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 17:06:47,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-18 17:06:47,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-08-18 17:06:47,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-18 17:06:47,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-08-18 17:06:47,062 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-08-18 17:06:47,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:06:47,062 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-08-18 17:06:47,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:06:47,063 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-08-18 17:06:47,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 17:06:47,064 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:06:47,064 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 17:06:47,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:06:47,065 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:06:47,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:06:47,065 INFO L82 PathProgramCache]: Analyzing trace with hash -29727073, now seen corresponding path program 1 times [2020-08-18 17:06:47,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:06:47,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070797224] [2020-08-18 17:06:47,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:06:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:47,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:06:47,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:47,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:06:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:47,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 17:06:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:47,222 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 17:06:47,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070797224] [2020-08-18 17:06:47,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:06:47,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 17:06:47,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506033174] [2020-08-18 17:06:47,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 17:06:47,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:06:47,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 17:06:47,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:06:47,226 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-08-18 17:06:47,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:06:47,445 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-08-18 17:06:47,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 17:06:47,446 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-18 17:06:47,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:06:47,447 INFO L225 Difference]: With dead ends: 45 [2020-08-18 17:06:47,448 INFO L226 Difference]: Without dead ends: 31 [2020-08-18 17:06:47,449 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 17:06:47,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-18 17:06:47,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-08-18 17:06:47,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-18 17:06:47,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-08-18 17:06:47,457 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2020-08-18 17:06:47,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:06:47,458 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-08-18 17:06:47,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 17:06:47,458 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-08-18 17:06:47,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 17:06:47,459 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:06:47,459 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 17:06:47,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:06:47,459 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:06:47,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:06:47,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1680455870, now seen corresponding path program 1 times [2020-08-18 17:06:47,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:06:47,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409760717] [2020-08-18 17:06:47,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:06:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:47,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:06:47,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:47,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:06:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:47,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:06:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:47,681 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 17:06:47,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409760717] [2020-08-18 17:06:47,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:06:47,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 17:06:47,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87504424] [2020-08-18 17:06:47,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:06:47,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:06:47,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:06:47,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:06:47,686 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 8 states. [2020-08-18 17:06:47,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:06:47,887 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-08-18 17:06:47,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 17:06:47,887 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-08-18 17:06:47,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:06:47,888 INFO L225 Difference]: With dead ends: 48 [2020-08-18 17:06:47,889 INFO L226 Difference]: Without dead ends: 34 [2020-08-18 17:06:47,889 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 17:06:47,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-18 17:06:47,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-18 17:06:47,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 17:06:47,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-08-18 17:06:47,896 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 28 [2020-08-18 17:06:47,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:06:47,897 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-08-18 17:06:47,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:06:47,897 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-08-18 17:06:47,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 17:06:47,898 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:06:47,898 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 17:06:47,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:06:47,899 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:06:47,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:06:47,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1166508097, now seen corresponding path program 2 times [2020-08-18 17:06:47,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:06:47,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026238581] [2020-08-18 17:06:47,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:06:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:47,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:06:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:48,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:06:48,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:48,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 17:06:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:48,116 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 17:06:48,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026238581] [2020-08-18 17:06:48,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:06:48,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 17:06:48,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787590696] [2020-08-18 17:06:48,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 17:06:48,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:06:48,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 17:06:48,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:06:48,119 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 9 states. [2020-08-18 17:06:48,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:06:48,324 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-08-18 17:06:48,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 17:06:48,325 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-08-18 17:06:48,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:06:48,326 INFO L225 Difference]: With dead ends: 51 [2020-08-18 17:06:48,326 INFO L226 Difference]: Without dead ends: 37 [2020-08-18 17:06:48,327 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 17:06:48,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-18 17:06:48,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-08-18 17:06:48,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-18 17:06:48,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-08-18 17:06:48,334 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 31 [2020-08-18 17:06:48,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:06:48,335 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-08-18 17:06:48,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 17:06:48,335 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-08-18 17:06:48,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 17:06:48,336 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:06:48,336 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 17:06:48,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:06:48,337 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:06:48,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:06:48,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1706812894, now seen corresponding path program 3 times [2020-08-18 17:06:48,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:06:48,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017706381] [2020-08-18 17:06:48,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:06:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:48,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:06:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:48,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:06:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:48,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-18 17:06:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:48,501 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 17:06:48,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017706381] [2020-08-18 17:06:48,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:06:48,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 17:06:48,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41259781] [2020-08-18 17:06:48,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 17:06:48,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:06:48,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 17:06:48,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:06:48,504 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 11 states. [2020-08-18 17:06:48,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:06:48,792 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-08-18 17:06:48,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 17:06:48,793 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-08-18 17:06:48,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:06:48,794 INFO L225 Difference]: With dead ends: 43 [2020-08-18 17:06:48,794 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 17:06:48,795 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 17:06:48,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 17:06:48,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-18 17:06:48,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 17:06:48,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-08-18 17:06:48,803 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 34 [2020-08-18 17:06:48,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:06:48,803 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-08-18 17:06:48,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 17:06:48,804 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-08-18 17:06:48,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-18 17:06:48,805 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:06:48,805 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 17:06:48,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:06:48,805 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:06:48,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:06:48,806 INFO L82 PathProgramCache]: Analyzing trace with hash 991320762, now seen corresponding path program 1 times [2020-08-18 17:06:48,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:06:48,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671466860] [2020-08-18 17:06:48,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:06:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:48,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:06:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:48,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:06:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:48,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-18 17:06:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:48,995 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 17:06:48,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671466860] [2020-08-18 17:06:48,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:06:48,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 17:06:48,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836988171] [2020-08-18 17:06:48,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 17:06:48,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:06:48,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 17:06:48,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-18 17:06:48,997 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 14 states. [2020-08-18 17:06:49,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:06:49,410 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-08-18 17:06:49,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 17:06:49,411 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-08-18 17:06:49,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:06:49,413 INFO L225 Difference]: With dead ends: 44 [2020-08-18 17:06:49,413 INFO L226 Difference]: Without dead ends: 37 [2020-08-18 17:06:49,414 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 17:06:49,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-18 17:06:49,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-08-18 17:06:49,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-18 17:06:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-08-18 17:06:49,427 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 35 [2020-08-18 17:06:49,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:06:49,427 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-08-18 17:06:49,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 17:06:49,427 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-08-18 17:06:49,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-18 17:06:49,430 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:06:49,430 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 17:06:49,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:06:49,431 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:06:49,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:06:49,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1265881822, now seen corresponding path program 2 times [2020-08-18 17:06:49,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:06:49,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631791700] [2020-08-18 17:06:49,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:06:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:49,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:06:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:49,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:06:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:49,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-18 17:06:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:06:49,677 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 17:06:49,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631791700] [2020-08-18 17:06:49,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:06:49,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 17:06:49,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689726679] [2020-08-18 17:06:49,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 17:06:49,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:06:49,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 17:06:49,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:06:49,681 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 10 states. [2020-08-18 17:06:50,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:06:50,005 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-08-18 17:06:50,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 17:06:50,006 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-08-18 17:06:50,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:06:50,009 INFO L225 Difference]: With dead ends: 55 [2020-08-18 17:06:50,009 INFO L226 Difference]: Without dead ends: 51 [2020-08-18 17:06:50,010 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 17:06:50,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-18 17:06:50,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-08-18 17:06:50,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-18 17:06:50,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-08-18 17:06:50,021 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 36 [2020-08-18 17:06:50,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:06:50,021 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-08-18 17:06:50,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 17:06:50,021 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-08-18 17:06:50,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 17:06:50,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:06:50,024 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 17:06:50,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:06:50,025 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:06:50,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:06:50,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1775282106, now seen corresponding path program 3 times [2020-08-18 17:06:50,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:06:50,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447529163] [2020-08-18 17:06:50,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:06:50,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 17:06:50,050 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 17:06:50,051 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 17:06:50,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:06:50,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:06:50 BoogieIcfgContainer [2020-08-18 17:06:50,076 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:06:50,079 INFO L168 Benchmark]: Toolchain (without parser) took 5096.75 ms. Allocated memory was 139.5 MB in the beginning and 247.5 MB in the end (delta: 108.0 MB). Free memory was 100.5 MB in the beginning and 103.0 MB in the end (delta: -2.5 MB). Peak memory consumption was 105.5 MB. Max. memory is 7.1 GB. [2020-08-18 17:06:50,080 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 17:06:50,081 INFO L168 Benchmark]: CACSL2BoogieTranslator took 658.47 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 100.3 MB in the beginning and 166.3 MB in the end (delta: -66.0 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. [2020-08-18 17:06:50,081 INFO L168 Benchmark]: Boogie Preprocessor took 84.36 ms. Allocated memory is still 202.4 MB. Free memory was 166.3 MB in the beginning and 163.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-08-18 17:06:50,082 INFO L168 Benchmark]: RCFGBuilder took 623.00 ms. Allocated memory is still 202.4 MB. Free memory was 163.6 MB in the beginning and 120.0 MB in the end (delta: 43.7 MB). Peak memory consumption was 43.7 MB. Max. memory is 7.1 GB. [2020-08-18 17:06:50,083 INFO L168 Benchmark]: TraceAbstraction took 3726.06 ms. Allocated memory was 202.4 MB in the beginning and 247.5 MB in the end (delta: 45.1 MB). Free memory was 119.3 MB in the beginning and 103.0 MB in the end (delta: 16.3 MB). Peak memory consumption was 61.4 MB. Max. memory is 7.1 GB. [2020-08-18 17:06:50,087 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 658.47 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 100.3 MB in the beginning and 166.3 MB in the end (delta: -66.0 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 84.36 ms. Allocated memory is still 202.4 MB. Free memory was 166.3 MB in the beginning and 163.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 623.00 ms. Allocated memory is still 202.4 MB. Free memory was 163.6 MB in the beginning and 120.0 MB in the end (delta: 43.7 MB). Peak memory consumption was 43.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3726.06 ms. Allocated memory was 202.4 MB in the beginning and 247.5 MB in the end (delta: 45.1 MB). Free memory was 119.3 MB in the beginning and 103.0 MB in the end (delta: 16.3 MB). Peak memory consumption was 61.4 MB. 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: 3.6s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 1.9s, 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, 1.2s 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, 1.1s 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...