/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/alternating_list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:17:14,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:17:14,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:17:14,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:17:14,387 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:17:14,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:17:14,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:17:14,403 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:17:14,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:17:14,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:17:14,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:17:14,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:17:14,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:17:14,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:17:14,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:17:14,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:17:14,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:17:14,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:17:14,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:17:14,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:17:14,432 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:17:14,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:17:14,436 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:17:14,437 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:17:14,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 16:17:14,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 16:17:14,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 16:17:14,446 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 16:17:14,446 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 16:17:14,448 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 16:17:14,449 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 16:17:14,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 16:17:14,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 16:17:14,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 16:17:14,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 16:17:14,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 16:17:14,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 16:17:14,453 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 16:17:14,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:17:14,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:17:14,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:17:14,456 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 16:17:14,498 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:17:14,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:17:14,500 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:17:14,500 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:17:14,501 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:17:14,501 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:17:14,501 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:17:14,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:17:14,502 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:17:14,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:17:14,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:17:14,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:17:14,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:17:14,504 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:17:14,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:17:14,504 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:17:14,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:17:14,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:17:14,505 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:17:14,505 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:17:14,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:17:14,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:17:14,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:17:14,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:17:14,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:17:14,506 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:17:14,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:17:14,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:17:14,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:17:14,507 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 [2020-08-18 16:17:14,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:17:14,852 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:17:14,857 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:17:14,859 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:17:14,859 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:17:14,860 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/alternating_list-2.i [2020-08-18 16:17:14,937 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/82471107b/eeabe56e22e3426b9b8c767fcc7076e1/FLAG619a224e3 [2020-08-18 16:17:15,535 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:17:15,536 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/alternating_list-2.i [2020-08-18 16:17:15,553 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/82471107b/eeabe56e22e3426b9b8c767fcc7076e1/FLAG619a224e3 [2020-08-18 16:17:15,812 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/82471107b/eeabe56e22e3426b9b8c767fcc7076e1 [2020-08-18 16:17:15,823 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:17:15,825 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:17:15,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:17:15,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:17:15,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:17:15,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:17:15" (1/1) ... [2020-08-18 16:17:15,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c46e88b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:15, skipping insertion in model container [2020-08-18 16:17:15,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:17:15" (1/1) ... [2020-08-18 16:17:15,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:17:15,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:17:16,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:17:16,390 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:17:16,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:17:16,516 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:17:16,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:16 WrapperNode [2020-08-18 16:17:16,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:17:16,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:17:16,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:17:16,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:17:16,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:16" (1/1) ... [2020-08-18 16:17:16,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:16" (1/1) ... [2020-08-18 16:17:16,548 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:16" (1/1) ... [2020-08-18 16:17:16,548 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:16" (1/1) ... [2020-08-18 16:17:16,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:16" (1/1) ... [2020-08-18 16:17:16,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:16" (1/1) ... [2020-08-18 16:17:16,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:16" (1/1) ... [2020-08-18 16:17:16,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:17:16,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:17:16,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:17:16,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:17:16,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:16" (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 16:17:16,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:17:16,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:17:16,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-18 16:17:16,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-18 16:17:16,647 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-08-18 16:17:16,647 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-08-18 16:17:16,647 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-08-18 16:17:16,648 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-18 16:17:16,648 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:17:16,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:17:16,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 16:17:16,648 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-18 16:17:16,649 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-18 16:17:16,649 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-18 16:17:16,649 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-18 16:17:16,649 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-18 16:17:16,649 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-18 16:17:16,649 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-18 16:17:16,650 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-18 16:17:16,650 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-18 16:17:16,650 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-18 16:17:16,650 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-18 16:17:16,650 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-18 16:17:16,650 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-18 16:17:16,651 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-18 16:17:16,651 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-18 16:17:16,651 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-18 16:17:16,651 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-18 16:17:16,651 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-18 16:17:16,651 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-08-18 16:17:16,651 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-08-18 16:17:16,652 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-08-18 16:17:16,652 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-18 16:17:16,652 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-18 16:17:16,652 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-18 16:17:16,652 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-18 16:17:16,652 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-18 16:17:16,653 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-18 16:17:16,653 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-18 16:17:16,653 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-18 16:17:16,653 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-18 16:17:16,653 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-18 16:17:16,653 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-18 16:17:16,653 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-18 16:17:16,654 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-18 16:17:16,654 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-18 16:17:16,654 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-18 16:17:16,654 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-18 16:17:16,654 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-18 16:17:16,654 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-18 16:17:16,654 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-18 16:17:16,655 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-18 16:17:16,655 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-18 16:17:16,655 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-18 16:17:16,655 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-18 16:17:16,655 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-18 16:17:16,655 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-18 16:17:16,656 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-18 16:17:16,656 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-18 16:17:16,656 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-18 16:17:16,656 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-18 16:17:16,656 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-18 16:17:16,656 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-18 16:17:16,657 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-18 16:17:16,657 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-18 16:17:16,657 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-18 16:17:16,657 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 16:17:16,657 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 16:17:16,657 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-18 16:17:16,657 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 16:17:16,658 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-18 16:17:16,658 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-18 16:17:16,658 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-18 16:17:16,658 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-18 16:17:16,658 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 16:17:16,658 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-18 16:17:16,659 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-18 16:17:16,659 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-18 16:17:16,659 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 16:17:16,659 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-18 16:17:16,659 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-18 16:17:16,659 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-18 16:17:16,659 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-18 16:17:16,660 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-18 16:17:16,660 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-18 16:17:16,660 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-18 16:17:16,660 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-18 16:17:16,660 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-18 16:17:16,660 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-18 16:17:16,661 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-18 16:17:16,661 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-18 16:17:16,661 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-18 16:17:16,661 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-18 16:17:16,661 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-18 16:17:16,661 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-18 16:17:16,661 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-18 16:17:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-18 16:17:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-18 16:17:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-18 16:17:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-18 16:17:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-18 16:17:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-18 16:17:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-18 16:17:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-18 16:17:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-18 16:17:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-18 16:17:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-18 16:17:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-18 16:17:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-18 16:17:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-18 16:17:16,664 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-18 16:17:16,664 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-18 16:17:16,664 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-18 16:17:16,664 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-18 16:17:16,664 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-18 16:17:16,664 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-18 16:17:16,664 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-18 16:17:16,665 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-18 16:17:16,665 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-18 16:17:16,665 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:17:16,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 16:17:16,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 16:17:16,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 16:17:16,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 16:17:16,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 16:17:16,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 16:17:16,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:17:16,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:17:17,079 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-18 16:17:17,220 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:17:17,220 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-18 16:17:17,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:17:17 BoogieIcfgContainer [2020-08-18 16:17:17,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:17:17,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:17:17,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:17:17,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:17:17,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:17:15" (1/3) ... [2020-08-18 16:17:17,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f3a7c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:17:17, skipping insertion in model container [2020-08-18 16:17:17,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:16" (2/3) ... [2020-08-18 16:17:17,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f3a7c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:17:17, skipping insertion in model container [2020-08-18 16:17:17,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:17:17" (3/3) ... [2020-08-18 16:17:17,234 INFO L109 eAbstractionObserver]: Analyzing ICFG alternating_list-2.i [2020-08-18 16:17:17,245 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:17:17,253 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:17:17,269 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:17:17,294 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:17:17,295 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:17:17,295 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:17:17,295 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:17:17,295 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:17:17,296 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:17:17,296 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:17:17,296 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:17:17,312 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-18 16:17:17,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 16:17:17,318 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:17,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:17,320 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:17,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:17,327 INFO L82 PathProgramCache]: Analyzing trace with hash 209903222, now seen corresponding path program 1 times [2020-08-18 16:17:17,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:17,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934212321] [2020-08-18 16:17:17,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:17,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:17,530 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 16:17:17,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934212321] [2020-08-18 16:17:17,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:17,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:17,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423220481] [2020-08-18 16:17:17,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:17,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:17,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:17,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:17,557 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-18 16:17:17,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:17,691 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-08-18 16:17:17,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:17,693 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-18 16:17:17,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:17,701 INFO L225 Difference]: With dead ends: 52 [2020-08-18 16:17:17,701 INFO L226 Difference]: Without dead ends: 23 [2020-08-18 16:17:17,705 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 16:17:17,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-18 16:17:17,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-08-18 16:17:17,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-18 16:17:17,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-08-18 16:17:17,763 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 15 [2020-08-18 16:17:17,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:17,763 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-08-18 16:17:17,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:17,764 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-08-18 16:17:17,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 16:17:17,765 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:17,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:17,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:17:17,765 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:17,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:17,766 INFO L82 PathProgramCache]: Analyzing trace with hash 919137993, now seen corresponding path program 1 times [2020-08-18 16:17:17,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:17,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303113485] [2020-08-18 16:17:17,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:17,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:17,893 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 16:17:17,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303113485] [2020-08-18 16:17:17,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:17,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 16:17:17,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853577516] [2020-08-18 16:17:17,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 16:17:17,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:17,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 16:17:17,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 16:17:17,897 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 4 states. [2020-08-18 16:17:17,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:17,977 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2020-08-18 16:17:17,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 16:17:17,978 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-08-18 16:17:17,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:17,979 INFO L225 Difference]: With dead ends: 51 [2020-08-18 16:17:17,980 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 16:17:17,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 16:17:17,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 16:17:17,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-08-18 16:17:17,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 16:17:17,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-08-18 16:17:17,989 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 16 [2020-08-18 16:17:17,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:17,989 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-08-18 16:17:17,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 16:17:17,990 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-08-18 16:17:17,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 16:17:17,991 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:17,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:17,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:17:17,991 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:17,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:17,992 INFO L82 PathProgramCache]: Analyzing trace with hash 919131049, now seen corresponding path program 1 times [2020-08-18 16:17:17,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:17,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390433119] [2020-08-18 16:17:17,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:18,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:18,076 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 16:17:18,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390433119] [2020-08-18 16:17:18,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:18,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 16:17:18,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667994134] [2020-08-18 16:17:18,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 16:17:18,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:18,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 16:17:18,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:17:18,079 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 6 states. [2020-08-18 16:17:18,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:18,196 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-08-18 16:17:18,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 16:17:18,197 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-08-18 16:17:18,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:18,198 INFO L225 Difference]: With dead ends: 61 [2020-08-18 16:17:18,198 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 16:17:18,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 16:17:18,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 16:17:18,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2020-08-18 16:17:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-18 16:17:18,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-08-18 16:17:18,207 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 16 [2020-08-18 16:17:18,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:18,207 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-08-18 16:17:18,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 16:17:18,208 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-08-18 16:17:18,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 16:17:18,209 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:18,209 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, 1] [2020-08-18 16:17:18,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:17:18,209 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:18,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:18,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1446652468, now seen corresponding path program 1 times [2020-08-18 16:17:18,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:18,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600411556] [2020-08-18 16:17:18,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 16:17:18,279 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 16:17:18,280 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 16:17:18,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 16:17:18,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:17:18 BoogieIcfgContainer [2020-08-18 16:17:18,302 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:17:18,305 INFO L168 Benchmark]: Toolchain (without parser) took 2479.18 ms. Allocated memory was 141.0 MB in the beginning and 236.5 MB in the end (delta: 95.4 MB). Free memory was 101.8 MB in the beginning and 161.3 MB in the end (delta: -59.6 MB). Peak memory consumption was 35.9 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:18,306 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 16:17:18,307 INFO L168 Benchmark]: CACSL2BoogieTranslator took 690.96 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 101.5 MB in the beginning and 169.2 MB in the end (delta: -67.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:18,308 INFO L168 Benchmark]: Boogie Preprocessor took 69.56 ms. Allocated memory is still 202.9 MB. Free memory was 169.2 MB in the beginning and 166.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:18,309 INFO L168 Benchmark]: RCFGBuilder took 637.51 ms. Allocated memory is still 202.9 MB. Free memory was 166.3 MB in the beginning and 121.7 MB in the end (delta: 44.5 MB). Peak memory consumption was 44.5 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:18,310 INFO L168 Benchmark]: TraceAbstraction took 1076.27 ms. Allocated memory was 202.9 MB in the beginning and 236.5 MB in the end (delta: 33.6 MB). Free memory was 121.1 MB in the beginning and 161.3 MB in the end (delta: -40.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 16:17:18,313 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 690.96 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 101.5 MB in the beginning and 169.2 MB in the end (delta: -67.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 69.56 ms. Allocated memory is still 202.9 MB. Free memory was 169.2 MB in the beginning and 166.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 637.51 ms. Allocated memory is still 202.9 MB. Free memory was 166.3 MB in the beginning and 121.7 MB in the end (delta: 44.5 MB). Peak memory consumption was 44.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1076.27 ms. Allocated memory was 202.9 MB in the beginning and 236.5 MB in the end (delta: 33.6 MB). Free memory was 121.1 MB in the beginning and 161.3 MB in the end (delta: -40.2 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 562]: 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 p = a; [L526] COND TRUE __VERIFIER_nondet_int() [L527] COND TRUE \read(flag) [L528] p->h = 2 [L529] flag = 0 [L534] t = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(t == 0) [L536] p->n = t [L537] EXPR p->n [L537] p = p->n [L526] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 [L540] p = a [L541] flag = 1 [L542] EXPR p->h [L542] COND TRUE p->h != 3 [L543] COND TRUE \read(flag) [L544] flag = 0 [L545] EXPR p->h [L545] COND TRUE p->h != 1 [L562] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 87 SDtfs, 26 SDslu, 73 SDs, 0 SdLazy, 130 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=0, 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, 3 MinimizatonAttempts, 14 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 1522 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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...