/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-ext2-properties/simple_and_skiplist_2lvl-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:13:55,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:13:55,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:13:55,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 16:13:55,461 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 16:13:55,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 16:13:55,470 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 16:13:55,479 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 16:13:55,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 16:13:55,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 16:13:55,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 16:13:55,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 16:13:55,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:13:55,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:13:55,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:13:55,514 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:13:55,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:13:55,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:13:55,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:13:55,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:13:55,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:13:55,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:13:55,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:13:55,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:13:55,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-21 16:13:55,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-21 16:13:55,556 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-21 16:13:55,559 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-21 16:13:55,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-21 16:13:55,561 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-21 16:13:55,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-21 16:13:55,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-21 16:13:55,565 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-21 16:13:55,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-21 16:13:55,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-21 16:13:55,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-21 16:13:55,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-21 16:13:55,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-21 16:13:55,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:13:55,570 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:13:55,571 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:13:55,572 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 [2021-02-21 16:13:55,636 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:13:55,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:13:55,642 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:13:55,643 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:13:55,643 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:13:55,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:13:55,644 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:13:55,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:13:55,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:13:55,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:13:55,646 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:13:55,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:13:55,647 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:13:55,647 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:13:55,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:13:55,648 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:13:55,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:13:55,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:13:55,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:13:55,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:13:55,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:13:55,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:13:55,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:13:55,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:13:55,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:13:55,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:13:55,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:13:55,651 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:13:55,651 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:13:56,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:13:56,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:13:56,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:13:56,169 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:13:56,170 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:13:56,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2021-02-21 16:13:56,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33d484129/4a7aa2f9764148799b082e7c01112873/FLAGa43a7d4ed [2021-02-21 16:13:57,009 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:13:57,010 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2021-02-21 16:13:57,036 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33d484129/4a7aa2f9764148799b082e7c01112873/FLAGa43a7d4ed [2021-02-21 16:13:57,256 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33d484129/4a7aa2f9764148799b082e7c01112873 [2021-02-21 16:13:57,260 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:13:57,275 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:13:57,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:13:57,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:13:57,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:13:57,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:13:57" (1/1) ... [2021-02-21 16:13:57,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c9bd7f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:57, skipping insertion in model container [2021-02-21 16:13:57,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:13:57" (1/1) ... [2021-02-21 16:13:57,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:13:57,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:13:57,960 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i[24032,24045] [2021-02-21 16:13:57,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:13:57,986 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:13:58,092 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i[24032,24045] [2021-02-21 16:13:58,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:13:58,195 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:13:58,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:58 WrapperNode [2021-02-21 16:13:58,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:13:58,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:13:58,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:13:58,201 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:13:58,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:58" (1/1) ... [2021-02-21 16:13:58,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:58" (1/1) ... [2021-02-21 16:13:58,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:58" (1/1) ... [2021-02-21 16:13:58,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:58" (1/1) ... [2021-02-21 16:13:58,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:58" (1/1) ... [2021-02-21 16:13:58,299 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:58" (1/1) ... [2021-02-21 16:13:58,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:58" (1/1) ... [2021-02-21 16:13:58,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:13:58,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:13:58,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:13:58,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:13:58,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:58" (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 [2021-02-21 16:13:58,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:13:58,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:13:58,449 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:13:58,449 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-02-21 16:13:58,450 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-02-21 16:13:58,450 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die [2021-02-21 16:13:58,450 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sl_with_head_and_tail [2021-02-21 16:13:58,450 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_random_insert [2021-02-21 16:13:58,450 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sl [2021-02-21 16:13:58,451 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-02-21 16:13:58,451 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:13:58,451 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:13:58,452 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:13:58,452 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-21 16:13:58,453 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-21 16:13:58,453 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:13:58,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:13:58,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 16:13:58,454 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-21 16:13:58,454 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-21 16:13:58,454 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-21 16:13:58,454 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-21 16:13:58,454 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-21 16:13:58,455 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-21 16:13:58,455 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-21 16:13:58,455 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-21 16:13:58,455 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-21 16:13:58,455 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-21 16:13:58,455 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-21 16:13:58,456 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-21 16:13:58,456 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-21 16:13:58,456 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-21 16:13:58,456 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-21 16:13:58,456 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-21 16:13:58,456 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-02-21 16:13:58,456 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-02-21 16:13:58,456 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-21 16:13:58,457 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-21 16:13:58,457 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-21 16:13:58,457 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-21 16:13:58,457 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-21 16:13:58,457 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-21 16:13:58,457 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-21 16:13:58,457 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-21 16:13:58,458 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-21 16:13:58,458 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-21 16:13:58,458 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-21 16:13:58,458 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-21 16:13:58,458 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-21 16:13:58,458 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-21 16:13:58,458 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-21 16:13:58,459 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-21 16:13:58,459 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-21 16:13:58,459 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-21 16:13:58,460 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-21 16:13:58,460 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-21 16:13:58,461 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-21 16:13:58,461 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-21 16:13:58,461 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-21 16:13:58,461 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-21 16:13:58,461 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-21 16:13:58,461 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-21 16:13:58,462 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-21 16:13:58,462 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-21 16:13:58,462 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-21 16:13:58,462 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-21 16:13:58,463 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-21 16:13:58,463 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-21 16:13:58,463 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-21 16:13:58,463 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-21 16:13:58,463 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-21 16:13:58,463 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-21 16:13:58,464 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-21 16:13:58,465 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-21 16:13:58,465 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-02-21 16:13:58,465 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-21 16:13:58,465 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-21 16:13:58,465 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-21 16:13:58,466 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-02-21 16:13:58,466 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-21 16:13:58,467 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-02-21 16:13:58,468 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-21 16:13:58,468 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-21 16:13:58,468 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-02-21 16:13:58,469 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-21 16:13:58,469 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-21 16:13:58,469 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-21 16:13:58,470 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-21 16:13:58,470 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-21 16:13:58,470 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-21 16:13:58,470 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-21 16:13:58,471 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-21 16:13:58,471 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-21 16:13:58,471 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-21 16:13:58,471 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-21 16:13:58,471 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-21 16:13:58,471 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-21 16:13:58,472 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-21 16:13:58,472 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-21 16:13:58,472 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-21 16:13:58,472 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-21 16:13:58,472 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-21 16:13:58,472 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-21 16:13:58,472 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-21 16:13:58,472 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-21 16:13:58,473 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-21 16:13:58,473 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-21 16:13:58,473 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-21 16:13:58,473 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-21 16:13:58,473 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-21 16:13:58,473 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-21 16:13:58,473 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-21 16:13:58,474 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-21 16:13:58,475 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-21 16:13:58,475 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-21 16:13:58,475 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-21 16:13:58,476 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-21 16:13:58,476 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-21 16:13:58,476 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-21 16:13:58,476 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-21 16:13:58,476 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-21 16:13:58,477 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-21 16:13:58,477 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die [2021-02-21 16:13:58,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-21 16:13:58,477 INFO L130 BoogieDeclarations]: Found specification of procedure create_sl_with_head_and_tail [2021-02-21 16:13:58,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-21 16:13:58,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-21 16:13:58,477 INFO L130 BoogieDeclarations]: Found specification of procedure sl_random_insert [2021-02-21 16:13:58,477 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sl [2021-02-21 16:13:58,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:13:58,478 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-02-21 16:13:58,478 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:13:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:13:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:13:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:13:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:13:58,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:13:58,940 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-02-21 16:13:59,249 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:13:59,249 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-21 16:13:59,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:13:59 BoogieIcfgContainer [2021-02-21 16:13:59,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:13:59,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:13:59,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:13:59,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:13:59,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:13:57" (1/3) ... [2021-02-21 16:13:59,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c81c35e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:13:59, skipping insertion in model container [2021-02-21 16:13:59,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:58" (2/3) ... [2021-02-21 16:13:59,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c81c35e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:13:59, skipping insertion in model container [2021-02-21 16:13:59,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:13:59" (3/3) ... [2021-02-21 16:13:59,272 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-1.i [2021-02-21 16:13:59,282 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:13:59,288 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:13:59,317 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:13:59,350 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:13:59,351 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:13:59,351 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:13:59,351 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:13:59,351 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:13:59,351 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:13:59,351 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:13:59,352 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:13:59,369 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2021-02-21 16:13:59,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-21 16:13:59,375 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:13:59,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:13:59,376 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:13:59,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:13:59,383 INFO L82 PathProgramCache]: Analyzing trace with hash -140425679, now seen corresponding path program 1 times [2021-02-21 16:13:59,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:13:59,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074716431] [2021-02-21 16:13:59,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:13:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:13:59,593 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:13:59,594 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:13:59,601 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:13:59,602 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:13:59,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:13:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:13:59,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:13:59,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:13:59,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:13:59,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074716431] [2021-02-21 16:13:59,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:13:59,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 16:13:59,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362186572] [2021-02-21 16:13:59,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 16:13:59,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:13:59,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 16:13:59,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 16:13:59,699 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 3 states. [2021-02-21 16:13:59,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:13:59,969 INFO L93 Difference]: Finished difference Result 95 states and 129 transitions. [2021-02-21 16:13:59,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 16:13:59,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2021-02-21 16:13:59,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:13:59,979 INFO L225 Difference]: With dead ends: 95 [2021-02-21 16:13:59,980 INFO L226 Difference]: Without dead ends: 18 [2021-02-21 16:13:59,984 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 [2021-02-21 16:14:00,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-02-21 16:14:00,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-02-21 16:14:00,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-02-21 16:14:00,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-02-21 16:14:00,032 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2021-02-21 16:14:00,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:14:00,033 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-02-21 16:14:00,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 16:14:00,033 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-02-21 16:14:00,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-21 16:14:00,034 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:14:00,034 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:14:00,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:14:00,035 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:14:00,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:14:00,036 INFO L82 PathProgramCache]: Analyzing trace with hash -500866268, now seen corresponding path program 1 times [2021-02-21 16:14:00,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:14:00,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528694704] [2021-02-21 16:14:00,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:14:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:14:00,124 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,125 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,132 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:14:00,141 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:14:00,148 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,149 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:14:00,155 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,156 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:14:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:14:00,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,189 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:14:00,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528694704] [2021-02-21 16:14:00,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:14:00,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:14:00,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641535738] [2021-02-21 16:14:00,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:14:00,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:14:00,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:14:00,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:14:00,195 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2021-02-21 16:14:00,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:14:00,297 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-02-21 16:14:00,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 16:14:00,298 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2021-02-21 16:14:00,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:14:00,299 INFO L225 Difference]: With dead ends: 33 [2021-02-21 16:14:00,300 INFO L226 Difference]: Without dead ends: 31 [2021-02-21 16:14:00,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-21 16:14:00,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-02-21 16:14:00,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-02-21 16:14:00,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-02-21 16:14:00,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-02-21 16:14:00,308 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2021-02-21 16:14:00,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:14:00,309 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-02-21 16:14:00,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:14:00,309 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-02-21 16:14:00,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-21 16:14:00,310 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:14:00,310 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:14:00,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:14:00,311 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:14:00,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:14:00,311 INFO L82 PathProgramCache]: Analyzing trace with hash -585734747, now seen corresponding path program 1 times [2021-02-21 16:14:00,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:14:00,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013262663] [2021-02-21 16:14:00,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:14:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:14:00,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,392 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:14:00,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:14:00,409 WARN L141 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-02-21 16:14:00,411 WARN L147 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size 22 [2021-02-21 16:14:00,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,424 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:14:00,432 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,433 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:14:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:14:00,464 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:14:00,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013262663] [2021-02-21 16:14:00,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941729000] [2021-02-21 16:14:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-21 16:14:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:14:00,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-21 16:14:00,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-21 16:14:00,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,639 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,640 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,641 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,641 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,642 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,645 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,647 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,648 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,648 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,649 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,650 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,650 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,651 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,653 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,655 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,655 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,658 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,658 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,659 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,659 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,660 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,661 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,662 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,663 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,663 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,664 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:00,665 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,692 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:14:00,696 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,709 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 16:14:00,710 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,711 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:14:00,712 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:14:00,713 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,714 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:14:00,715 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,716 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:14:00,716 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,717 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:14:00,718 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:14:00,720 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:14:00,722 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,723 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:14:00,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,726 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:14:00,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:14:00,733 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,734 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:14:00,735 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,736 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:14:00,737 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:14:00,739 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,741 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:14:00,743 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,744 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:14:00,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,750 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:14:00,751 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:14:00,755 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,757 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:14:00,759 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 16:14:00,763 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,764 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 16:14:00,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 16:14:00,765 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,766 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 16:14:00,767 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-02-21 16:14:00,770 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 16:14:00,779 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,785 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 16:14:00,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 16:14:00,786 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,787 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 16:14:00,790 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-02-21 16:14:00,796 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 16:14:00,806 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 16:14:00,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 16:14:00,814 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 16:14:00,818 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-21 16:14:00,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-21 16:14:00,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,876 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:14:00,876 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,877 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:14:00,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-21 16:14:00,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-21 16:14:00,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,896 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:14:00,897 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,898 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:14:00,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-21 16:14:00,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,908 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,909 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-21 16:14:00,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-02-21 16:14:00,911 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2021-02-21 16:14:00,912 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,919 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-21 16:14:00,921 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,922 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-21 16:14:00,929 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,930 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-21 16:14:00,932 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,933 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-21 16:14:00,934 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,935 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-21 16:14:00,936 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,937 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-21 16:14:00,938 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-21 16:14:00,941 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,943 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-21 16:14:00,947 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,948 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-21 16:14:00,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,949 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-21 16:14:00,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 16:14:00,960 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,961 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-21 16:14:00,962 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-02-21 16:14:00,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 16:14:00,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,968 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-21 16:14:00,970 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-21 16:14:00,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 16:14:00,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 16:14:00,983 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,984 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 16:14:00,985 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 16:14:00,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 16:14:00,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 16:14:00,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:00,992 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 16:14:00,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 16:14:00,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 16:14:00,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:01,000 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-21 16:14:01,001 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-21 16:14:01,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-02-21 16:14:01,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:01,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 16:14:01,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:01,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:14:01,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-21 16:14:01,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:01,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-02-21 16:14:01,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:01,032 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 16:14:01,033 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:01,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:14:01,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-21 16:14:01,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:01,043 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:01,044 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:14:01,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-02-21 16:14:01,045 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2021-02-21 16:14:01,047 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:01,047 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:14:01,048 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:01,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:14:01,050 WARN L141 QuantifierPusher]: treesize reduction 15, result has 6.3 percent of original size [2021-02-21 16:14:01,053 WARN L147 QuantifierPusher]: treesize reduction 15, result has 6.3 percent of original size 1 [2021-02-21 16:14:01,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:01,055 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:01,056 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:01,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:01,057 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:01,057 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:01,058 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:01,058 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:01,059 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:01,059 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:01,060 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:14:01,060 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:14:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:14:01,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-21 16:14:01,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-21 16:14:01,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445214981] [2021-02-21 16:14:01,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-21 16:14:01,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:14:01,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-21 16:14:01,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-21 16:14:01,071 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 7 states. [2021-02-21 16:14:01,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:14:01,190 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-02-21 16:14:01,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 16:14:01,191 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2021-02-21 16:14:01,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:14:01,191 INFO L225 Difference]: With dead ends: 37 [2021-02-21 16:14:01,192 INFO L226 Difference]: Without dead ends: 27 [2021-02-21 16:14:01,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-21 16:14:01,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-02-21 16:14:01,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2021-02-21 16:14:01,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-02-21 16:14:01,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-02-21 16:14:01,198 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2021-02-21 16:14:01,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:14:01,198 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-02-21 16:14:01,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-21 16:14:01,198 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-02-21 16:14:01,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-21 16:14:01,199 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:14:01,199 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:14:01,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-02-21 16:14:01,413 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:14:01,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:14:01,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1821561269, now seen corresponding path program 1 times [2021-02-21 16:14:01,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:14:01,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121123543] [2021-02-21 16:14:01,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:14:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:14:01,468 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:14:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:14:01,509 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:14:01,550 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-21 16:14:01,551 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 16:14:01,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 16:14:01,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:14:01 BoogieIcfgContainer [2021-02-21 16:14:01,597 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:14:01,598 INFO L168 Benchmark]: Toolchain (without parser) took 4335.96 ms. Allocated memory was 152.0 MB in the beginning and 184.5 MB in the end (delta: 32.5 MB). Free memory was 125.7 MB in the beginning and 110.9 MB in the end (delta: 14.8 MB). Peak memory consumption was 48.0 MB. Max. memory is 8.0 GB. [2021-02-21 16:14:01,599 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 152.0 MB. Free memory was 124.3 MB in the beginning and 124.2 MB in the end (delta: 118.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:14:01,599 INFO L168 Benchmark]: CACSL2BoogieTranslator took 916.27 ms. Allocated memory is still 152.0 MB. Free memory was 124.5 MB in the beginning and 133.9 MB in the end (delta: -9.5 MB). Peak memory consumption was 26.8 MB. Max. memory is 8.0 GB. [2021-02-21 16:14:01,600 INFO L168 Benchmark]: Boogie Preprocessor took 113.82 ms. Allocated memory is still 152.0 MB. Free memory was 133.9 MB in the beginning and 130.6 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-02-21 16:14:01,600 INFO L168 Benchmark]: RCFGBuilder took 943.44 ms. Allocated memory is still 152.0 MB. Free memory was 130.6 MB in the beginning and 76.1 MB in the end (delta: 54.5 MB). Peak memory consumption was 54.5 MB. Max. memory is 8.0 GB. [2021-02-21 16:14:01,600 INFO L168 Benchmark]: TraceAbstraction took 2336.70 ms. Allocated memory was 152.0 MB in the beginning and 184.5 MB in the end (delta: 32.5 MB). Free memory was 75.5 MB in the beginning and 110.9 MB in the end (delta: -35.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:14:01,602 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 152.0 MB. Free memory was 124.3 MB in the beginning and 124.2 MB in the end (delta: 118.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 916.27 ms. Allocated memory is still 152.0 MB. Free memory was 124.5 MB in the beginning and 133.9 MB in the end (delta: -9.5 MB). Peak memory consumption was 26.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 113.82 ms. Allocated memory is still 152.0 MB. Free memory was 133.9 MB in the beginning and 130.6 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 943.44 ms. Allocated memory is still 152.0 MB. Free memory was 130.6 MB in the beginning and 76.1 MB in the end (delta: 54.5 MB). Peak memory consumption was 54.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2336.70 ms. Allocated memory was 152.0 MB in the beginning and 184.5 MB in the end (delta: 32.5 MB). Free memory was 75.5 MB in the beginning and 110.9 MB in the end (delta: -35.3 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 613]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L596] List a = (List) malloc(sizeof(struct node)); VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L597] COND FALSE !(a == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L598] List t; [L599] List p = a; [L600] a->h = 2 VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L601] COND TRUE __VERIFIER_nondet_int() [L602] p->h = 1 [L603] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L604] COND FALSE !(t == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L605] p->n = t [L606] EXPR p->n [L606] p = p->n [L601] COND FALSE !(__VERIFIER_nondet_int()) [L608] p->h = 2 [L609] p->n = 0 [L610] p = a VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L611] COND TRUE p!=0 [L612] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, p->h=1, t={-2:0}] [L612] COND TRUE p->h != 2 [L613] reach_error() VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 67 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.2s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 81 SDtfs, 56 SDslu, 76 SDs, 0 SdLazy, 141 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 57 ConstructedInterpolants, 0 QuantifiedInterpolants, 5347 SizeOfPredicates, 6 NumberOfNonLiveVariables, 114 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 2/4 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...