/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=WIDEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/splice-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:43:59,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:43:59,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:43:59,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 22:43:59,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 22:43:59,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 22:43:59,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 22:43:59,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 22:43:59,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 22:43:59,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 22:43:59,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 22:43:59,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 22:43:59,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:43:59,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:43:59,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:43:59,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:43:59,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:43:59,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:43:59,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:43:59,614 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:43:59,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:43:59,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:43:59,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:43:59,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:43:59,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 22:43:59,627 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 22:43:59,627 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 22:43:59,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 22:43:59,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 22:43:59,633 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 22:43:59,633 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 22:43:59,634 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 22:43:59,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 22:43:59,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 22:43:59,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 22:43:59,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 22:43:59,637 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 22:43:59,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 22:43:59,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:43:59,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:43:59,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:43:59,641 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 22:43:59,685 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:43:59,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:43:59,687 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:43:59,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:43:59,688 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:43:59,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:43:59,689 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:43:59,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:43:59,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:43:59,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:43:59,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:43:59,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:43:59,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:43:59,691 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:43:59,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:43:59,692 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:43:59,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:43:59,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:43:59,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:43:59,692 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:43:59,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:43:59,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:43:59,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:43:59,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:43:59,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:43:59,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:43:59,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:43:59,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:43:59,694 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:43:59,694 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=WIDEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; [2020-08-18 22:44:00,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:44:00,063 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:44:00,067 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:44:00,069 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:44:00,069 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:44:00,070 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/splice-1.i [2020-08-18 22:44:00,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2fff90159/5a8624fc701547a2b42b992794efe001/FLAG7e2d6234f [2020-08-18 22:44:00,695 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:44:00,696 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/splice-1.i [2020-08-18 22:44:00,722 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2fff90159/5a8624fc701547a2b42b992794efe001/FLAG7e2d6234f [2020-08-18 22:44:00,998 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2fff90159/5a8624fc701547a2b42b992794efe001 [2020-08-18 22:44:01,005 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:44:01,007 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:44:01,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:44:01,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:44:01,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:44:01,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:44:00" (1/1) ... [2020-08-18 22:44:01,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b3ca2de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:44:01, skipping insertion in model container [2020-08-18 22:44:01,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:44:00" (1/1) ... [2020-08-18 22:44:01,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:44:01,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:44:01,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:44:01,464 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:44:01,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:44:01,604 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:44:01,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:44:01 WrapperNode [2020-08-18 22:44:01,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:44:01,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:44:01,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:44:01,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:44:01,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:44:01" (1/1) ... [2020-08-18 22:44:01,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:44:01" (1/1) ... [2020-08-18 22:44:01,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:44:01" (1/1) ... [2020-08-18 22:44:01,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:44:01" (1/1) ... [2020-08-18 22:44:01,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:44:01" (1/1) ... [2020-08-18 22:44:01,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:44:01" (1/1) ... [2020-08-18 22:44:01,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:44:01" (1/1) ... [2020-08-18 22:44:01,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:44:01,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:44:01,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:44:01,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:44:01,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:44:01" (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 22:44:01,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:44:01,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:44:01,755 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-18 22:44:01,755 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-18 22:44:01,756 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-08-18 22:44:01,756 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-08-18 22:44:01,756 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-08-18 22:44:01,757 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-18 22:44:01,757 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:44:01,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:44:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 22:44:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-18 22:44:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-18 22:44:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-18 22:44:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-18 22:44:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-18 22:44:01,760 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-18 22:44:01,760 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-18 22:44:01,760 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-18 22:44:01,760 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-18 22:44:01,760 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-18 22:44:01,760 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-18 22:44:01,761 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-18 22:44:01,761 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-18 22:44:01,761 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-18 22:44:01,762 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-18 22:44:01,762 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-18 22:44:01,762 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-18 22:44:01,762 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-18 22:44:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-08-18 22:44:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-08-18 22:44:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-08-18 22:44:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-18 22:44:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-18 22:44:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-18 22:44:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-18 22:44:01,764 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-18 22:44:01,764 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-18 22:44:01,764 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-18 22:44:01,764 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-18 22:44:01,764 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-18 22:44:01,764 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-18 22:44:01,764 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-18 22:44:01,765 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-18 22:44:01,765 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-18 22:44:01,765 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-18 22:44:01,766 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-18 22:44:01,766 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-18 22:44:01,767 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-18 22:44:01,767 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-18 22:44:01,767 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-18 22:44:01,767 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-18 22:44:01,767 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-18 22:44:01,767 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-18 22:44:01,767 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-18 22:44:01,768 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-18 22:44:01,768 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-18 22:44:01,768 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-18 22:44:01,769 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-18 22:44:01,769 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-18 22:44:01,769 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-18 22:44:01,769 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-18 22:44:01,769 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-18 22:44:01,769 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-18 22:44:01,769 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-18 22:44:01,770 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-18 22:44:01,770 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 22:44:01,771 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 22:44:01,771 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-18 22:44:01,771 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 22:44:01,771 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-18 22:44:01,771 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-18 22:44:01,772 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-18 22:44:01,772 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-18 22:44:01,773 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 22:44:01,773 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-18 22:44:01,773 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-18 22:44:01,774 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-18 22:44:01,774 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 22:44:01,775 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-18 22:44:01,775 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-18 22:44:01,775 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-18 22:44:01,775 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-18 22:44:01,775 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-18 22:44:01,775 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-18 22:44:01,775 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-18 22:44:01,776 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-18 22:44:01,776 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-18 22:44:01,776 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-18 22:44:01,776 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-18 22:44:01,776 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-18 22:44:01,776 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-18 22:44:01,776 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-18 22:44:01,777 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-18 22:44:01,777 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-18 22:44:01,777 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-18 22:44:01,777 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-18 22:44:01,777 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-18 22:44:01,777 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-18 22:44:01,777 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-18 22:44:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-18 22:44:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-18 22:44:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-18 22:44:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-18 22:44:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-18 22:44:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-18 22:44:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-18 22:44:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-18 22:44:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-18 22:44:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-18 22:44:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-18 22:44:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-18 22:44:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-18 22:44:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-18 22:44:01,780 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-18 22:44:01,780 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-18 22:44:01,780 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-18 22:44:01,780 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-18 22:44:01,781 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-18 22:44:01,781 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:44:01,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 22:44:01,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 22:44:01,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 22:44:01,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 22:44:01,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 22:44:01,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:44:01,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:44:01,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 22:44:02,183 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-18 22:44:02,353 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:44:02,353 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-18 22:44:02,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:44:02 BoogieIcfgContainer [2020-08-18 22:44:02,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:44:02,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:44:02,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:44:02,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:44:02,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:44:00" (1/3) ... [2020-08-18 22:44:02,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45772e3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:44:02, skipping insertion in model container [2020-08-18 22:44:02,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:44:01" (2/3) ... [2020-08-18 22:44:02,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45772e3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:44:02, skipping insertion in model container [2020-08-18 22:44:02,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:44:02" (3/3) ... [2020-08-18 22:44:02,374 INFO L109 eAbstractionObserver]: Analyzing ICFG splice-1.i [2020-08-18 22:44:02,385 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:44:02,402 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:44:02,414 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:44:02,439 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:44:02,440 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:44:02,440 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:44:02,440 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:44:02,440 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:44:02,440 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:44:02,440 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:44:02,440 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:44:02,459 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-08-18 22:44:02,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 22:44:02,465 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:44:02,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:44:02,466 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:44:02,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:44:02,473 INFO L82 PathProgramCache]: Analyzing trace with hash 661731879, now seen corresponding path program 1 times [2020-08-18 22:44:02,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:44:02,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544622942] [2020-08-18 22:44:02,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:44:02,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:44:02,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:44:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:44:02,698 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 22:44:02,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544622942] [2020-08-18 22:44:02,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:44:02,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:44:02,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833469204] [2020-08-18 22:44:02,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:44:02,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:44:02,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:44:02,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:44:02,726 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-08-18 22:44:02,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:44:02,869 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2020-08-18 22:44:02,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:44:02,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 22:44:02,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:44:02,880 INFO L225 Difference]: With dead ends: 54 [2020-08-18 22:44:02,880 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 22:44:02,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:44:02,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 22:44:02,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-18 22:44:02,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 22:44:02,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-08-18 22:44:02,945 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 16 [2020-08-18 22:44:02,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:44:02,945 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-08-18 22:44:02,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:44:02,945 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-08-18 22:44:02,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 22:44:02,946 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:44:02,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:44:02,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:44:02,947 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:44:02,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:44:02,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1973627133, now seen corresponding path program 1 times [2020-08-18 22:44:02,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:44:02,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707584223] [2020-08-18 22:44:02,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:44:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:44:03,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:44:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:44:03,073 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 22:44:03,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707584223] [2020-08-18 22:44:03,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:44:03,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:44:03,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003254380] [2020-08-18 22:44:03,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:44:03,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:44:03,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:44:03,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:44:03,077 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 5 states. [2020-08-18 22:44:03,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:44:03,199 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2020-08-18 22:44:03,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:44:03,199 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-18 22:44:03,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:44:03,200 INFO L225 Difference]: With dead ends: 44 [2020-08-18 22:44:03,201 INFO L226 Difference]: Without dead ends: 37 [2020-08-18 22:44:03,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:44:03,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-18 22:44:03,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-08-18 22:44:03,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 22:44:03,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-08-18 22:44:03,210 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 18 [2020-08-18 22:44:03,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:44:03,210 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-08-18 22:44:03,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:44:03,211 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-08-18 22:44:03,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 22:44:03,212 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:44:03,212 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] [2020-08-18 22:44:03,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:44:03,212 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:44:03,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:44:03,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1721544590, now seen corresponding path program 1 times [2020-08-18 22:44:03,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:44:03,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149466855] [2020-08-18 22:44:03,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:44:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:44:03,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:44:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:44:03,292 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 22:44:03,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149466855] [2020-08-18 22:44:03,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:44:03,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:44:03,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730232546] [2020-08-18 22:44:03,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:44:03,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:44:03,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:44:03,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:44:03,294 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 5 states. [2020-08-18 22:44:03,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:44:03,407 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2020-08-18 22:44:03,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:44:03,408 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-18 22:44:03,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:44:03,411 INFO L225 Difference]: With dead ends: 51 [2020-08-18 22:44:03,411 INFO L226 Difference]: Without dead ends: 43 [2020-08-18 22:44:03,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:44:03,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-18 22:44:03,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-08-18 22:44:03,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-18 22:44:03,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2020-08-18 22:44:03,420 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 20 [2020-08-18 22:44:03,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:44:03,421 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2020-08-18 22:44:03,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:44:03,421 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2020-08-18 22:44:03,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 22:44:03,422 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:44:03,422 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:44:03,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:44:03,423 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:44:03,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:44:03,423 INFO L82 PathProgramCache]: Analyzing trace with hash -918584693, now seen corresponding path program 1 times [2020-08-18 22:44:03,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:44:03,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800005123] [2020-08-18 22:44:03,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:44:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:44:03,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:44:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:44:03,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:44:03,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800005123] [2020-08-18 22:44:03,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:44:03,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 22:44:03,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487293263] [2020-08-18 22:44:03,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 22:44:03,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:44:03,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 22:44:03,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:44:03,514 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 7 states. [2020-08-18 22:44:03,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:44:03,713 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2020-08-18 22:44:03,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 22:44:03,714 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-08-18 22:44:03,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:44:03,715 INFO L225 Difference]: With dead ends: 74 [2020-08-18 22:44:03,715 INFO L226 Difference]: Without dead ends: 47 [2020-08-18 22:44:03,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:44:03,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-18 22:44:03,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2020-08-18 22:44:03,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 22:44:03,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-08-18 22:44:03,733 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 21 [2020-08-18 22:44:03,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:44:03,733 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-08-18 22:44:03,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 22:44:03,733 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-08-18 22:44:03,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 22:44:03,734 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:44:03,735 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:44:03,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:44:03,735 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:44:03,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:44:03,735 INFO L82 PathProgramCache]: Analyzing trace with hash -743556192, now seen corresponding path program 1 times [2020-08-18 22:44:03,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:44:03,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415115398] [2020-08-18 22:44:03,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:44:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 22:44:03,823 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 22:44:03,823 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 22:44:03,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:44:03,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 10:44:03 BoogieIcfgContainer [2020-08-18 22:44:03,848 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 22:44:03,851 INFO L168 Benchmark]: Toolchain (without parser) took 2842.89 ms. Allocated memory was 139.5 MB in the beginning and 234.9 MB in the end (delta: 95.4 MB). Free memory was 100.6 MB in the beginning and 122.2 MB in the end (delta: -21.5 MB). Peak memory consumption was 73.9 MB. Max. memory is 7.1 GB. [2020-08-18 22:44:03,852 INFO L168 Benchmark]: CDTParser took 0.19 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 22:44:03,853 INFO L168 Benchmark]: CACSL2BoogieTranslator took 597.38 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 100.4 MB in the beginning and 168.8 MB in the end (delta: -68.4 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. [2020-08-18 22:44:03,854 INFO L168 Benchmark]: Boogie Preprocessor took 80.75 ms. Allocated memory is still 201.9 MB. Free memory was 168.8 MB in the beginning and 165.2 MB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 7.1 GB. [2020-08-18 22:44:03,854 INFO L168 Benchmark]: RCFGBuilder took 671.69 ms. Allocated memory is still 201.9 MB. Free memory was 165.2 MB in the beginning and 119.0 MB in the end (delta: 46.2 MB). Peak memory consumption was 46.2 MB. Max. memory is 7.1 GB. [2020-08-18 22:44:03,855 INFO L168 Benchmark]: TraceAbstraction took 1488.42 ms. Allocated memory was 201.9 MB in the beginning and 234.9 MB in the end (delta: 33.0 MB). Free memory was 118.4 MB in the beginning and 122.2 MB in the end (delta: -3.8 MB). Peak memory consumption was 29.2 MB. Max. memory is 7.1 GB. [2020-08-18 22:44:03,859 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 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 597.38 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 100.4 MB in the beginning and 168.8 MB in the end (delta: -68.4 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 80.75 ms. Allocated memory is still 201.9 MB. Free memory was 168.8 MB in the beginning and 165.2 MB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 671.69 ms. Allocated memory is still 201.9 MB. Free memory was 165.2 MB in the beginning and 119.0 MB in the end (delta: 46.2 MB). Peak memory consumption was 46.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1488.42 ms. Allocated memory was 201.9 MB in the beginning and 234.9 MB in the end (delta: 33.0 MB). Free memory was 118.4 MB in the beginning and 122.2 MB in the end (delta: -3.8 MB). Peak memory consumption was 29.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 573]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] int flag = 1; [L522] List a = (List) malloc(sizeof(struct node)); [L523] COND FALSE !(a == 0) [L524] List t; [L525] List l1; [L526] List l2; [L527] List b; [L528] List u; [L529] List p = a; [L530] COND TRUE __VERIFIER_nondet_int() [L531] COND TRUE \read(flag) [L532] p->h = 1 [L533] flag = 0 [L538] t = (List) malloc(sizeof(struct node)) [L539] COND FALSE !(t == 0) [L540] p->n = t [L541] EXPR p->n [L541] p = p->n [L530] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 3 [L544] EXPR a->h [L544] COND FALSE !(a->h == 3) [L545] flag = 1 [L546] l1 = 0 [L547] l2 = 0 [L548] p = a [L549] EXPR p->h [L549] COND TRUE p->h != 3 [L550] t = p [L551] EXPR p->n [L551] p = p->n [L552] COND TRUE \read(flag) [L553] t->n = l1 [L554] l1 = t [L555] flag = 0 [L549] EXPR p->h [L549] COND FALSE !(p->h != 3) [L562] p = l1 [L563] COND TRUE p != 0 [L564] EXPR p->h [L564] COND TRUE p->h != 2 [L573] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 52 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 124 SDtfs, 28 SDslu, 164 SDs, 0 SdLazy, 245 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=4, 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, 4 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 71 ConstructedInterpolants, 0 QuantifiedInterpolants, 3646 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 2/2 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...