/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-ext3-properties/dll_nullified-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:18:28,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:18:28,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:18:28,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:18:28,436 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:18:28,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:18:28,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:18:28,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:18:28,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:18:28,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:18:28,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:18:28,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:18:28,445 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:18:28,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:18:28,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:18:28,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:18:28,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:18:28,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:18:28,451 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:18:28,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:18:28,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:18:28,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:18:28,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:18:28,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:18:28,460 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 16:18:28,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 16:18:28,461 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 16:18:28,461 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 16:18:28,462 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 16:18:28,463 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 16:18:28,463 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 16:18:28,464 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 16:18:28,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 16:18:28,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 16:18:28,470 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 16:18:28,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 16:18:28,471 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 16:18:28,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 16:18:28,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:18:28,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:18:28,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:18:28,478 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 16:18:28,532 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:18:28,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:18:28,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:18:28,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:18:28,536 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:18:28,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:18:28,537 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:18:28,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:18:28,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:18:28,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:18:28,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:18:28,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:18:28,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:18:28,538 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:18:28,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:18:28,538 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:18:28,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:18:28,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:18:28,541 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:18:28,541 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:18:28,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:18:28,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:18:28,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:18:28,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:18:28,542 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:18:28,542 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:18:28,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:18:28,543 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:18:28,543 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:18:28,543 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 16:18:28,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:18:28,927 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:18:28,933 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:18:28,934 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:18:28,935 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:18:28,936 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-08-18 16:18:29,011 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e87a63e78/689a92c5f0e34c468d31859cda837f6d/FLAG0318d2cc4 [2020-08-18 16:18:29,510 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:18:29,516 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-08-18 16:18:29,536 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e87a63e78/689a92c5f0e34c468d31859cda837f6d/FLAG0318d2cc4 [2020-08-18 16:18:29,813 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e87a63e78/689a92c5f0e34c468d31859cda837f6d [2020-08-18 16:18:29,822 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:18:29,824 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:18:29,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:18:29,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:18:29,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:18:29,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:18:29" (1/1) ... [2020-08-18 16:18:29,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7845d484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:29, skipping insertion in model container [2020-08-18 16:18:29,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:18:29" (1/1) ... [2020-08-18 16:18:29,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:18:29,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:18:30,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:18:30,431 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:18:30,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:18:30,555 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:18:30,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:30 WrapperNode [2020-08-18 16:18:30,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:18:30,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:18:30,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:18:30,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:18:30,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:30" (1/1) ... [2020-08-18 16:18:30,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:30" (1/1) ... [2020-08-18 16:18:30,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:30" (1/1) ... [2020-08-18 16:18:30,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:30" (1/1) ... [2020-08-18 16:18:30,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:30" (1/1) ... [2020-08-18 16:18:30,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:30" (1/1) ... [2020-08-18 16:18:30,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:30" (1/1) ... [2020-08-18 16:18:30,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:18:30,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:18:30,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:18:30,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:18:30,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:30" (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 16:18:30,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:18:30,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:18:30,695 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-18 16:18:30,695 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-18 16:18:30,695 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-18 16:18:30,695 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-08-18 16:18:30,696 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:18:30,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:18:30,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 16:18:30,697 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-18 16:18:30,697 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-18 16:18:30,698 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-18 16:18:30,698 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-18 16:18:30,698 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-18 16:18:30,698 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-18 16:18:30,699 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-18 16:18:30,700 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-18 16:18:30,700 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-18 16:18:30,700 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-18 16:18:30,700 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-18 16:18:30,701 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-18 16:18:30,701 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-18 16:18:30,701 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-18 16:18:30,701 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-18 16:18:30,703 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-18 16:18:30,703 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-18 16:18:30,704 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-18 16:18:30,704 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-18 16:18:30,704 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-18 16:18:30,705 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-18 16:18:30,705 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-18 16:18:30,705 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-18 16:18:30,705 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-18 16:18:30,705 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-18 16:18:30,705 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-18 16:18:30,705 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-18 16:18:30,706 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-18 16:18:30,706 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-18 16:18:30,706 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-18 16:18:30,706 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-18 16:18:30,706 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-18 16:18:30,707 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-18 16:18:30,707 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-18 16:18:30,707 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-18 16:18:30,707 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-18 16:18:30,707 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-18 16:18:30,707 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-18 16:18:30,707 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-18 16:18:30,708 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-18 16:18:30,708 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-18 16:18:30,708 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-18 16:18:30,708 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-18 16:18:30,708 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-18 16:18:30,708 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-18 16:18:30,708 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-18 16:18:30,709 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-18 16:18:30,709 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-18 16:18:30,709 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-18 16:18:30,709 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-18 16:18:30,710 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-18 16:18:30,710 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-18 16:18:30,710 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 16:18:30,710 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 16:18:30,711 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-18 16:18:30,711 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 16:18:30,711 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-18 16:18:30,711 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-18 16:18:30,712 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-18 16:18:30,712 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-18 16:18:30,712 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-18 16:18:30,713 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 16:18:30,713 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-18 16:18:30,714 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-18 16:18:30,714 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-18 16:18:30,714 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 16:18:30,715 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-18 16:18:30,715 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-18 16:18:30,715 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-18 16:18:30,716 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-18 16:18:30,716 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-18 16:18:30,717 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-18 16:18:30,717 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-18 16:18:30,717 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-18 16:18:30,717 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-18 16:18:30,717 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-18 16:18:30,717 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-18 16:18:30,717 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-18 16:18:30,718 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-18 16:18:30,719 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-18 16:18:30,719 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-18 16:18:30,719 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-18 16:18:30,719 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-18 16:18:30,719 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-18 16:18:30,719 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-18 16:18:30,719 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-18 16:18:30,720 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-18 16:18:30,720 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-18 16:18:30,720 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-18 16:18:30,720 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-18 16:18:30,720 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-18 16:18:30,720 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-18 16:18:30,720 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-18 16:18:30,721 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-18 16:18:30,721 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-18 16:18:30,721 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-18 16:18:30,721 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-18 16:18:30,721 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-18 16:18:30,721 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-18 16:18:30,721 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-18 16:18:30,721 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-18 16:18:30,722 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-18 16:18:30,722 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-18 16:18:30,722 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-18 16:18:30,722 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-18 16:18:30,722 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-18 16:18:30,722 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-08-18 16:18:30,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 16:18:30,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 16:18:30,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 16:18:30,724 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:18:30,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 16:18:30,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 16:18:30,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 16:18:30,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:18:30,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:18:31,124 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-18 16:18:31,339 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:18:31,340 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-18 16:18:31,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:18:31 BoogieIcfgContainer [2020-08-18 16:18:31,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:18:31,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:18:31,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:18:31,349 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:18:31,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:18:29" (1/3) ... [2020-08-18 16:18:31,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@132ab6d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:18:31, skipping insertion in model container [2020-08-18 16:18:31,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:30" (2/3) ... [2020-08-18 16:18:31,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@132ab6d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:18:31, skipping insertion in model container [2020-08-18 16:18:31,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:18:31" (3/3) ... [2020-08-18 16:18:31,352 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2020-08-18 16:18:31,363 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:18:31,371 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:18:31,386 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:18:31,408 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:18:31,408 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:18:31,409 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:18:31,410 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:18:31,410 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:18:31,410 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:18:31,410 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:18:31,410 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:18:31,426 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-08-18 16:18:31,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 16:18:31,434 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:31,435 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 16:18:31,436 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:31,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:31,442 INFO L82 PathProgramCache]: Analyzing trace with hash 248267832, now seen corresponding path program 1 times [2020-08-18 16:18:31,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:31,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906567425] [2020-08-18 16:18:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:31,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:31,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:31,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:18:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:31,799 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 16:18:31,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906567425] [2020-08-18 16:18:31,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:18:31,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 16:18:31,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295234163] [2020-08-18 16:18:31,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 16:18:31,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:31,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 16:18:31,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 16:18:31,829 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 7 states. [2020-08-18 16:18:32,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:32,164 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2020-08-18 16:18:32,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 16:18:32,166 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-18 16:18:32,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:32,173 INFO L225 Difference]: With dead ends: 73 [2020-08-18 16:18:32,173 INFO L226 Difference]: Without dead ends: 39 [2020-08-18 16:18:32,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-18 16:18:32,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-18 16:18:32,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-08-18 16:18:32,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 16:18:32,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2020-08-18 16:18:32,225 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 20 [2020-08-18 16:18:32,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:32,225 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2020-08-18 16:18:32,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 16:18:32,226 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2020-08-18 16:18:32,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 16:18:32,227 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:32,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:32,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:18:32,228 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:32,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:32,228 INFO L82 PathProgramCache]: Analyzing trace with hash 215856973, now seen corresponding path program 1 times [2020-08-18 16:18:32,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:32,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737342481] [2020-08-18 16:18:32,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:32,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:32,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:18:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:32,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737342481] [2020-08-18 16:18:32,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:18:32,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 16:18:32,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255494940] [2020-08-18 16:18:32,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 16:18:32,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:32,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 16:18:32,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:18:32,429 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 6 states. [2020-08-18 16:18:32,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:32,619 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2020-08-18 16:18:32,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 16:18:32,620 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-18 16:18:32,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:32,621 INFO L225 Difference]: With dead ends: 63 [2020-08-18 16:18:32,621 INFO L226 Difference]: Without dead ends: 39 [2020-08-18 16:18:32,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 16:18:32,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-18 16:18:32,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-08-18 16:18:32,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-18 16:18:32,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2020-08-18 16:18:32,640 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 27 [2020-08-18 16:18:32,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:32,641 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2020-08-18 16:18:32,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 16:18:32,642 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2020-08-18 16:18:32,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 16:18:32,644 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:32,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:32,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:18:32,644 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:32,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:32,645 INFO L82 PathProgramCache]: Analyzing trace with hash -795260277, now seen corresponding path program 1 times [2020-08-18 16:18:32,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:32,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268176063] [2020-08-18 16:18:32,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:32,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:32,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:18:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:32,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268176063] [2020-08-18 16:18:32,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:18:32,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 16:18:32,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584986314] [2020-08-18 16:18:32,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 16:18:32,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:32,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 16:18:32,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 16:18:32,791 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand 8 states. [2020-08-18 16:18:33,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:33,017 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2020-08-18 16:18:33,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 16:18:33,018 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-08-18 16:18:33,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:33,019 INFO L225 Difference]: With dead ends: 63 [2020-08-18 16:18:33,019 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 16:18:33,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-08-18 16:18:33,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 16:18:33,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-08-18 16:18:33,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-18 16:18:33,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-08-18 16:18:33,029 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2020-08-18 16:18:33,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:33,030 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-08-18 16:18:33,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 16:18:33,030 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-08-18 16:18:33,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 16:18:33,031 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:33,031 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:33,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:18:33,032 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:33,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:33,032 INFO L82 PathProgramCache]: Analyzing trace with hash 260013466, now seen corresponding path program 1 times [2020-08-18 16:18:33,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:33,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482030880] [2020-08-18 16:18:33,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:33,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:33,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:18:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:33,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482030880] [2020-08-18 16:18:33,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:18:33,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 16:18:33,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882665024] [2020-08-18 16:18:33,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 16:18:33,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:33,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 16:18:33,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-18 16:18:33,222 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 9 states. [2020-08-18 16:18:33,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:33,432 INFO L93 Difference]: Finished difference Result 70 states and 91 transitions. [2020-08-18 16:18:33,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 16:18:33,433 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-08-18 16:18:33,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:33,434 INFO L225 Difference]: With dead ends: 70 [2020-08-18 16:18:33,434 INFO L226 Difference]: Without dead ends: 53 [2020-08-18 16:18:33,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-08-18 16:18:33,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-18 16:18:33,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-08-18 16:18:33,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-18 16:18:33,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2020-08-18 16:18:33,443 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 34 [2020-08-18 16:18:33,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:33,443 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2020-08-18 16:18:33,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 16:18:33,444 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2020-08-18 16:18:33,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 16:18:33,445 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:33,445 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:33,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 16:18:33,446 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:33,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:33,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1408994219, now seen corresponding path program 2 times [2020-08-18 16:18:33,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:33,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051914683] [2020-08-18 16:18:33,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:33,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:33,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:18:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:33,633 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:33,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051914683] [2020-08-18 16:18:33,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:18:33,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 16:18:33,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460631987] [2020-08-18 16:18:33,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 16:18:33,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:33,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 16:18:33,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 16:18:33,636 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand 10 states. [2020-08-18 16:18:33,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:33,851 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2020-08-18 16:18:33,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 16:18:33,851 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-08-18 16:18:33,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:33,852 INFO L225 Difference]: With dead ends: 77 [2020-08-18 16:18:33,853 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 16:18:33,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-08-18 16:18:33,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 16:18:33,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-08-18 16:18:33,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 16:18:33,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2020-08-18 16:18:33,861 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 41 [2020-08-18 16:18:33,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:33,861 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2020-08-18 16:18:33,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 16:18:33,862 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2020-08-18 16:18:33,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-18 16:18:33,863 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:33,863 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:33,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 16:18:33,864 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:33,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:33,864 INFO L82 PathProgramCache]: Analyzing trace with hash -2107131782, now seen corresponding path program 3 times [2020-08-18 16:18:33,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:33,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726843759] [2020-08-18 16:18:33,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:33,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:33,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:18:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-08-18 16:18:33,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726843759] [2020-08-18 16:18:33,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:18:33,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 16:18:33,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842974102] [2020-08-18 16:18:33,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 16:18:33,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:33,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 16:18:33,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:18:33,987 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 6 states. [2020-08-18 16:18:34,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:34,125 INFO L93 Difference]: Finished difference Result 71 states and 94 transitions. [2020-08-18 16:18:34,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 16:18:34,126 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-08-18 16:18:34,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:34,129 INFO L225 Difference]: With dead ends: 71 [2020-08-18 16:18:34,129 INFO L226 Difference]: Without dead ends: 58 [2020-08-18 16:18:34,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 16:18:34,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-18 16:18:34,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-08-18 16:18:34,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 16:18:34,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-08-18 16:18:34,138 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 48 [2020-08-18 16:18:34,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:34,139 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-08-18 16:18:34,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 16:18:34,139 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-08-18 16:18:34,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-18 16:18:34,140 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:34,140 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:34,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 16:18:34,141 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:34,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:34,141 INFO L82 PathProgramCache]: Analyzing trace with hash -2107133704, now seen corresponding path program 1 times [2020-08-18 16:18:34,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:34,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557800014] [2020-08-18 16:18:34,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:34,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:34,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:18:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:34,357 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:34,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557800014] [2020-08-18 16:18:34,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:18:34,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 16:18:34,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897420970] [2020-08-18 16:18:34,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 16:18:34,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:34,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 16:18:34,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-18 16:18:34,360 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 11 states. [2020-08-18 16:18:34,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:34,582 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2020-08-18 16:18:34,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 16:18:34,583 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-08-18 16:18:34,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:34,584 INFO L225 Difference]: With dead ends: 90 [2020-08-18 16:18:34,584 INFO L226 Difference]: Without dead ends: 70 [2020-08-18 16:18:34,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-08-18 16:18:34,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-18 16:18:34,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-08-18 16:18:34,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-18 16:18:34,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-08-18 16:18:34,598 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 48 [2020-08-18 16:18:34,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:34,599 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-08-18 16:18:34,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 16:18:34,599 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-08-18 16:18:34,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 16:18:34,601 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:34,601 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:34,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 16:18:34,602 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:34,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:34,602 INFO L82 PathProgramCache]: Analyzing trace with hash 893734217, now seen corresponding path program 2 times [2020-08-18 16:18:34,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:34,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554239003] [2020-08-18 16:18:34,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:34,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:34,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:18:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-08-18 16:18:35,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554239003] [2020-08-18 16:18:35,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:18:35,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 16:18:35,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499301574] [2020-08-18 16:18:35,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 16:18:35,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:35,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 16:18:35,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-08-18 16:18:35,023 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 14 states. [2020-08-18 16:18:35,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:35,449 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2020-08-18 16:18:35,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 16:18:35,450 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-08-18 16:18:35,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:35,452 INFO L225 Difference]: With dead ends: 83 [2020-08-18 16:18:35,452 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 16:18:35,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-08-18 16:18:35,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 16:18:35,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2020-08-18 16:18:35,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-18 16:18:35,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2020-08-18 16:18:35,461 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 55 [2020-08-18 16:18:35,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:35,461 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2020-08-18 16:18:35,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 16:18:35,462 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2020-08-18 16:18:35,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 16:18:35,463 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:35,463 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:35,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 16:18:35,463 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:35,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:35,464 INFO L82 PathProgramCache]: Analyzing trace with hash 895583181, now seen corresponding path program 1 times [2020-08-18 16:18:35,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:35,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663111643] [2020-08-18 16:18:35,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:35,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 16:18:35,528 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 16:18:35,528 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 16:18:35,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 16:18:35,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:18:35 BoogieIcfgContainer [2020-08-18 16:18:35,554 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:18:35,557 INFO L168 Benchmark]: Toolchain (without parser) took 5732.55 ms. Allocated memory was 140.5 MB in the beginning and 283.1 MB in the end (delta: 142.6 MB). Free memory was 102.3 MB in the beginning and 162.8 MB in the end (delta: -60.4 MB). Peak memory consumption was 82.2 MB. Max. memory is 7.1 GB. [2020-08-18 16:18:35,558 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 16:18:35,559 INFO L168 Benchmark]: CACSL2BoogieTranslator took 731.64 ms. Allocated memory was 140.5 MB in the beginning and 200.8 MB in the end (delta: 60.3 MB). Free memory was 102.1 MB in the beginning and 166.8 MB in the end (delta: -64.6 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-08-18 16:18:35,559 INFO L168 Benchmark]: Boogie Preprocessor took 75.02 ms. Allocated memory is still 200.8 MB. Free memory was 166.8 MB in the beginning and 163.5 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. [2020-08-18 16:18:35,560 INFO L168 Benchmark]: RCFGBuilder took 712.05 ms. Allocated memory is still 200.8 MB. Free memory was 163.5 MB in the beginning and 117.1 MB in the end (delta: 46.4 MB). Peak memory consumption was 46.4 MB. Max. memory is 7.1 GB. [2020-08-18 16:18:35,561 INFO L168 Benchmark]: TraceAbstraction took 4208.96 ms. Allocated memory was 200.8 MB in the beginning and 283.1 MB in the end (delta: 82.3 MB). Free memory was 116.4 MB in the beginning and 162.8 MB in the end (delta: -46.3 MB). Peak memory consumption was 36.0 MB. Max. memory is 7.1 GB. [2020-08-18 16:18:35,565 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 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 731.64 ms. Allocated memory was 140.5 MB in the beginning and 200.8 MB in the end (delta: 60.3 MB). Free memory was 102.1 MB in the beginning and 166.8 MB in the end (delta: -64.6 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 75.02 ms. Allocated memory is still 200.8 MB. Free memory was 166.8 MB in the beginning and 163.5 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 712.05 ms. Allocated memory is still 200.8 MB. Free memory was 163.5 MB in the beginning and 117.1 MB in the end (delta: 46.4 MB). Peak memory consumption was 46.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4208.96 ms. Allocated memory was 200.8 MB in the beginning and 283.1 MB in the end (delta: 82.3 MB). Free memory was 116.4 MB in the beginning and 162.8 MB in the end (delta: -46.3 MB). Peak memory consumption was 36.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 605]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L588] const int len = 5; [L589] CALL, EXPR dll_create(len) [L568] DLL head = ((void *)0); [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND FALSE !(\read(head)) [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND FALSE !(len > 0) [L585] return head; [L589] RET, EXPR dll_create(len) [L589] DLL head = dll_create(len); [L590] head->next [L590] COND TRUE head->next [L591] EXPR head->data_0 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] EXPR head->data_1 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] EXPR head->data_2 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L605] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.1s, OverallIterations: 9, TraceHistogramMax: 5, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 282 SDtfs, 342 SDslu, 1152 SDs, 0 SdLazy, 946 SolverSat, 70 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 43 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 355 NumberOfCodeBlocks, 355 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 292 ConstructedInterpolants, 0 QuantifiedInterpolants, 37094 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 115/202 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...