/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -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 0.2.0-b8ad66e [2020-10-23 18:24:49,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:24:49,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:24:49,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:24:49,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:24:49,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:24:49,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:24:49,397 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:24:49,401 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:24:49,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:24:49,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:24:49,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:24:49,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:24:49,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:24:49,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:24:49,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:24:49,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:24:49,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:24:49,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:24:49,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:24:49,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:24:49,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:24:49,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:24:49,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:24:49,460 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 18:24:49,461 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 18:24:49,461 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 18:24:49,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 18:24:49,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 18:24:49,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 18:24:49,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 18:24:49,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 18:24:49,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 18:24:49,471 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 18:24:49,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 18:24:49,472 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 18:24:49,473 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 18:24:49,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 18:24:49,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:24:49,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:24:49,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:24:49,505 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:24:49,574 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:24:49,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:24:49,579 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:24:49,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:24:49,579 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:24:49,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:24:49,580 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:24:49,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:24:49,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:24:49,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:24:49,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:24:49,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:24:49,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:24:49,583 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:24:49,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:24:49,583 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:24:49,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:24:49,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:24:49,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:24:49,585 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:24:49,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:24:49,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:24:49,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:24:49,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:24:49,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:24:49,587 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:24:49,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:24:49,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:24:49,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:24:49,588 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:24:50,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:24:50,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:24:50,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:24:50,048 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:24:50,049 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:24:50,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/alternating_list-2.i [2020-10-23 18:24:50,142 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ed4e1e68/22fd831d909847a0a4364c419e161514/FLAGcd572ba9a [2020-10-23 18:24:50,725 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:24:50,726 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/alternating_list-2.i [2020-10-23 18:24:50,740 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ed4e1e68/22fd831d909847a0a4364c419e161514/FLAGcd572ba9a [2020-10-23 18:24:51,016 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ed4e1e68/22fd831d909847a0a4364c419e161514 [2020-10-23 18:24:51,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:24:51,025 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:24:51,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:24:51,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:24:51,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:24:51,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:24:51" (1/1) ... [2020-10-23 18:24:51,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62f91d6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:51, skipping insertion in model container [2020-10-23 18:24:51,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:24:51" (1/1) ... [2020-10-23 18:24:51,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:24:51,100 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:24:51,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:24:51,536 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:24:51,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:24:51,795 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:24:51,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:51 WrapperNode [2020-10-23 18:24:51,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:24:51,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:24:51,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:24:51,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:24:51,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:51" (1/1) ... [2020-10-23 18:24:51,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:51" (1/1) ... [2020-10-23 18:24:51,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:51" (1/1) ... [2020-10-23 18:24:51,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:51" (1/1) ... [2020-10-23 18:24:51,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:51" (1/1) ... [2020-10-23 18:24:51,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:51" (1/1) ... [2020-10-23 18:24:51,910 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:51" (1/1) ... [2020-10-23 18:24:51,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:24:51,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:24:51,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:24:51,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:24:51,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-10-23 18:24:52,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:24:52,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:24:52,021 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:24:52,022 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-23 18:24:52,022 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-23 18:24:52,023 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-23 18:24:52,023 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-23 18:24:52,023 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-23 18:24:52,023 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-23 18:24:52,024 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:24:52,024 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:24:52,024 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:24:52,025 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 18:24:52,026 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 18:24:52,026 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:24:52,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:24:52,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:24:52,027 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-23 18:24:52,027 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-23 18:24:52,028 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-23 18:24:52,028 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-23 18:24:52,028 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-23 18:24:52,028 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-23 18:24:52,028 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-23 18:24:52,029 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-23 18:24:52,029 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-23 18:24:52,029 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-23 18:24:52,029 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-23 18:24:52,030 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-23 18:24:52,030 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-23 18:24:52,030 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-23 18:24:52,030 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-23 18:24:52,030 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-23 18:24:52,031 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-23 18:24:52,031 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-23 18:24:52,031 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-23 18:24:52,031 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-23 18:24:52,031 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-23 18:24:52,031 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-23 18:24:52,032 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-23 18:24:52,032 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-23 18:24:52,032 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-23 18:24:52,032 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-23 18:24:52,032 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-23 18:24:52,033 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-23 18:24:52,033 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-23 18:24:52,033 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-23 18:24:52,033 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-23 18:24:52,033 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-23 18:24:52,033 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-23 18:24:52,034 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-23 18:24:52,034 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-23 18:24:52,034 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-23 18:24:52,034 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-23 18:24:52,034 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-23 18:24:52,036 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-23 18:24:52,036 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-23 18:24:52,036 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-23 18:24:52,036 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-23 18:24:52,037 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-23 18:24:52,037 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-23 18:24:52,037 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-23 18:24:52,037 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-23 18:24:52,037 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-23 18:24:52,038 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-23 18:24:52,038 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-23 18:24:52,039 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-23 18:24:52,039 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-23 18:24:52,039 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-23 18:24:52,039 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-23 18:24:52,040 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-23 18:24:52,040 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-23 18:24:52,040 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 18:24:52,041 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-23 18:24:52,041 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-23 18:24:52,041 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-23 18:24:52,041 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-23 18:24:52,042 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-23 18:24:52,042 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-23 18:24:52,043 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-23 18:24:52,043 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-23 18:24:52,043 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-23 18:24:52,043 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-23 18:24:52,044 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-23 18:24:52,044 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-23 18:24:52,045 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-23 18:24:52,045 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-23 18:24:52,046 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-23 18:24:52,046 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-23 18:24:52,046 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-23 18:24:52,046 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-23 18:24:52,047 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-23 18:24:52,047 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-23 18:24:52,047 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-23 18:24:52,047 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-23 18:24:52,047 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-23 18:24:52,047 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-23 18:24:52,048 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-23 18:24:52,048 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-23 18:24:52,048 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-23 18:24:52,048 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-23 18:24:52,048 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-23 18:24:52,048 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-23 18:24:52,048 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-23 18:24:52,049 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-23 18:24:52,049 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-23 18:24:52,049 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-23 18:24:52,049 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-23 18:24:52,049 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-23 18:24:52,049 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-23 18:24:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-23 18:24:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-23 18:24:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-23 18:24:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-23 18:24:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-23 18:24:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-23 18:24:52,052 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-23 18:24:52,052 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-23 18:24:52,053 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-23 18:24:52,053 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-23 18:24:52,053 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-23 18:24:52,053 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-23 18:24:52,053 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-23 18:24:52,053 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-23 18:24:52,054 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:24:52,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 18:24:52,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:24:52,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 18:24:52,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 18:24:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:24:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:24:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:24:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:24:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:24:52,639 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-23 18:24:52,795 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:24:52,796 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-23 18:24:52,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:24:52 BoogieIcfgContainer [2020-10-23 18:24:52,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:24:52,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:24:52,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:24:52,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:24:52,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:24:51" (1/3) ... [2020-10-23 18:24:52,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7528fa72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:24:52, skipping insertion in model container [2020-10-23 18:24:52,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:51" (2/3) ... [2020-10-23 18:24:52,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7528fa72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:24:52, skipping insertion in model container [2020-10-23 18:24:52,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:24:52" (3/3) ... [2020-10-23 18:24:52,809 INFO L111 eAbstractionObserver]: Analyzing ICFG alternating_list-2.i [2020-10-23 18:24:52,823 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:24:52,829 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:24:52,844 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:24:52,874 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:24:52,874 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:24:52,874 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:24:52,874 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:24:52,875 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:24:52,875 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:24:52,875 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:24:52,875 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:24:52,896 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-23 18:24:52,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-23 18:24:52,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:52,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:52,905 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:52,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:52,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1515441424, now seen corresponding path program 1 times [2020-10-23 18:24:52,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:52,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713225751] [2020-10-23 18:24:52,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:53,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:53,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:53,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713225751] [2020-10-23 18:24:53,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:53,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:24:53,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220497606] [2020-10-23 18:24:53,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:24:53,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:53,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:24:53,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:24:53,217 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-10-23 18:24:53,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:53,365 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2020-10-23 18:24:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:24:53,367 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-23 18:24:53,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:53,376 INFO L225 Difference]: With dead ends: 59 [2020-10-23 18:24:53,376 INFO L226 Difference]: Without dead ends: 25 [2020-10-23 18:24:53,381 INFO L677 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 [2020-10-23 18:24:53,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-23 18:24:53,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-23 18:24:53,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-23 18:24:53,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-23 18:24:53,428 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2020-10-23 18:24:53,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:53,429 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-23 18:24:53,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:24:53,429 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-23 18:24:53,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-23 18:24:53,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:53,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:53,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:24:53,431 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:53,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:53,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1292314762, now seen corresponding path program 1 times [2020-10-23 18:24:53,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:53,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186783128] [2020-10-23 18:24:53,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:53,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:53,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186783128] [2020-10-23 18:24:53,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:53,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:24:53,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32227585] [2020-10-23 18:24:53,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:24:53,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:53,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:24:53,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:24:53,613 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2020-10-23 18:24:53,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:53,789 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2020-10-23 18:24:53,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:24:53,789 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-23 18:24:53,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:53,793 INFO L225 Difference]: With dead ends: 51 [2020-10-23 18:24:53,793 INFO L226 Difference]: Without dead ends: 38 [2020-10-23 18:24:53,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:24:53,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-23 18:24:53,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2020-10-23 18:24:53,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-23 18:24:53,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-23 18:24:53,803 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2020-10-23 18:24:53,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:53,803 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-23 18:24:53,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:24:53,803 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-23 18:24:53,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-23 18:24:53,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:53,805 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, 1, 1] [2020-10-23 18:24:53,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:24:53,805 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:53,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:53,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1629498335, now seen corresponding path program 1 times [2020-10-23 18:24:53,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:53,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052670638] [2020-10-23 18:24:53,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:24:53,845 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:24:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:24:53,872 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:24:53,911 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:24:53,912 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:24:53,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:24:53,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:24:53 BoogieIcfgContainer [2020-10-23 18:24:53,985 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:24:53,990 INFO L168 Benchmark]: Toolchain (without parser) took 2965.89 ms. Allocated memory was 161.5 MB in the beginning and 216.0 MB in the end (delta: 54.5 MB). Free memory was 118.3 MB in the beginning and 166.1 MB in the end (delta: -47.9 MB). Peak memory consumption was 7.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:24:53,990 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 161.5 MB. Free memory is still 136.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:24:53,992 INFO L168 Benchmark]: CACSL2BoogieTranslator took 770.01 ms. Allocated memory is still 161.5 MB. Free memory was 117.7 MB in the beginning and 134.0 MB in the end (delta: -16.4 MB). Peak memory consumption was 4.9 MB. Max. memory is 8.0 GB. [2020-10-23 18:24:53,994 INFO L168 Benchmark]: Boogie Preprocessor took 127.22 ms. Allocated memory is still 161.5 MB. Free memory was 134.0 MB in the beginning and 131.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:24:53,995 INFO L168 Benchmark]: RCFGBuilder took 867.03 ms. Allocated memory is still 161.5 MB. Free memory was 131.4 MB in the beginning and 88.9 MB in the end (delta: 42.5 MB). Peak memory consumption was 43.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:24:53,997 INFO L168 Benchmark]: TraceAbstraction took 1184.94 ms. Allocated memory was 161.5 MB in the beginning and 216.0 MB in the end (delta: 54.5 MB). Free memory was 88.4 MB in the beginning and 166.1 MB in the end (delta: -77.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:24:54,005 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 161.5 MB. Free memory is still 136.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 770.01 ms. Allocated memory is still 161.5 MB. Free memory was 117.7 MB in the beginning and 134.0 MB in the end (delta: -16.4 MB). Peak memory consumption was 4.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 127.22 ms. Allocated memory is still 161.5 MB. Free memory was 134.0 MB in the beginning and 131.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 867.03 ms. Allocated memory is still 161.5 MB. Free memory was 131.4 MB in the beginning and 88.9 MB in the end (delta: 42.5 MB). Peak memory consumption was 43.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1184.94 ms. Allocated memory was 161.5 MB in the beginning and 216.0 MB in the end (delta: 54.5 MB). Free memory was 88.4 MB in the beginning and 166.1 MB in the end (delta: -77.7 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L532] int flag = 1; [L533] List a = (List) malloc(sizeof(struct node)); VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}] [L534] COND FALSE !(a == 0) VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}] [L535] List t; [L536] List p = a; VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L537] COND TRUE __VERIFIER_nondet_int() [L538] COND TRUE \read(flag) [L539] p->h = 2 [L540] flag = 0 VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L545] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L546] COND FALSE !(t == 0) VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L547] p->n = t [L548] EXPR p->n [L548] p = p->n [L537] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 [L551] p = a [L552] flag = 1 VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L553] EXPR p->h VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, p->h=2, t={-2:0}] [L553] COND TRUE p->h != 3 [L554] COND TRUE \read(flag) [L555] flag = 0 [L556] EXPR p->h VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, p->h=2, t={-2:0}] [L556] COND TRUE p->h != 1 [L573] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "alternating_list-2.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 61 SDtfs, 21 SDslu, 53 SDs, 0 SdLazy, 103 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred 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, 2 MinimizatonAttempts, 11 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 33 ConstructedInterpolants, 0 QuantifiedInterpolants, 1779 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...