/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:40:42,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:40:42,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:40:42,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 20:40:42,371 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 20:40:42,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 20:40:42,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 20:40:42,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 20:40:42,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 20:40:42,394 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 20:40:42,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 20:40:42,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 20:40:42,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:40:42,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:40:42,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:40:42,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:40:42,405 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:40:42,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:40:42,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:40:42,424 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:40:42,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:40:42,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:40:42,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:40:42,431 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:40:42,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 20:40:42,455 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 20:40:42,455 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 20:40:42,457 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 20:40:42,457 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 20:40:42,458 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 20:40:42,459 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 20:40:42,460 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 20:40:42,461 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 20:40:42,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 20:40:42,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 20:40:42,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 20:40:42,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 20:40:42,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 20:40:42,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:40:42,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:40:42,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:40:42,467 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:40:42,506 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:40:42,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:40:42,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:40:42,509 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:40:42,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:40:42,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:40:42,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:40:42,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:40:42,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:40:42,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:40:42,510 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:40:42,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:40:42,512 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:40:42,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:40:42,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:40:42,513 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:40:42,513 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:40:42,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:40:42,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:40:42,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:40:42,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:40:42,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:40:42,514 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:40:42,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:40:42,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:40:42,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:40:42,993 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:40:42,994 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:40:42,994 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-10-23 20:40:43,082 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93bd4b428/155fdec0a52048648ffc4327803c7a7a/FLAGdf3127440 [2020-10-23 20:40:43,809 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:40:43,809 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-10-23 20:40:43,830 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93bd4b428/155fdec0a52048648ffc4327803c7a7a/FLAGdf3127440 [2020-10-23 20:40:44,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93bd4b428/155fdec0a52048648ffc4327803c7a7a [2020-10-23 20:40:44,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:40:44,104 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:40:44,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:40:44,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:40:44,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:40:44,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:40:44" (1/1) ... [2020-10-23 20:40:44,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60c4368c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:40:44, skipping insertion in model container [2020-10-23 20:40:44,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:40:44" (1/1) ... [2020-10-23 20:40:44,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:40:44,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:40:44,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:40:44,553 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:40:44,599 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:40:44,699 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:40:44,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:40:44 WrapperNode [2020-10-23 20:40:44,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:40:44,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:40:44,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:40:44,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:40:44,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:40:44" (1/1) ... [2020-10-23 20:40:44,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:40:44" (1/1) ... [2020-10-23 20:40:44,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:40:44" (1/1) ... [2020-10-23 20:40:44,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:40:44" (1/1) ... [2020-10-23 20:40:44,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:40:44" (1/1) ... [2020-10-23 20:40:44,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:40:44" (1/1) ... [2020-10-23 20:40:44,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:40:44" (1/1) ... [2020-10-23 20:40:44,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:40:44,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:40:44,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:40:44,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:40:44,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:40:44" (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 20:40:44,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:40:44,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:40:44,848 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:40:44,848 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-23 20:40:44,848 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-23 20:40:44,848 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-23 20:40:44,849 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-10-23 20:40:44,849 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-10-23 20:40:44,849 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-10-23 20:40:44,849 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:40:44,849 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:40:44,849 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:40:44,849 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 20:40:44,850 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 20:40:44,850 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:40:44,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:40:44,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:40:44,850 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-23 20:40:44,850 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-23 20:40:44,851 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-23 20:40:44,851 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-23 20:40:44,851 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-23 20:40:44,851 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-23 20:40:44,851 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-23 20:40:44,851 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-23 20:40:44,852 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-23 20:40:44,852 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-23 20:40:44,852 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-23 20:40:44,852 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-23 20:40:44,852 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-23 20:40:44,852 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-23 20:40:44,853 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-23 20:40:44,853 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-23 20:40:44,853 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-23 20:40:44,853 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-23 20:40:44,853 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-23 20:40:44,853 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-23 20:40:44,854 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-23 20:40:44,854 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-23 20:40:44,854 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-23 20:40:44,854 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-23 20:40:44,854 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-23 20:40:44,854 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-23 20:40:44,854 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-23 20:40:44,855 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-23 20:40:44,855 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-23 20:40:44,855 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-23 20:40:44,855 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-23 20:40:44,855 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-23 20:40:44,855 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-23 20:40:44,856 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-23 20:40:44,856 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-23 20:40:44,856 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-23 20:40:44,856 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-23 20:40:44,856 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-23 20:40:44,856 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-23 20:40:44,856 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-23 20:40:44,857 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-23 20:40:44,857 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-23 20:40:44,857 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-23 20:40:44,857 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-23 20:40:44,857 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-23 20:40:44,857 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-23 20:40:44,858 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-23 20:40:44,858 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-23 20:40:44,858 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-23 20:40:44,858 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-23 20:40:44,858 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-23 20:40:44,858 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-23 20:40:44,859 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 20:40:44,859 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-23 20:40:44,859 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-23 20:40:44,859 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-23 20:40:44,859 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-23 20:40:44,859 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-23 20:40:44,860 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-23 20:40:44,860 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-23 20:40:44,860 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-23 20:40:44,860 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-23 20:40:44,860 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-23 20:40:44,860 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-23 20:40:44,861 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-23 20:40:44,861 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-23 20:40:44,861 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-23 20:40:44,861 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-23 20:40:44,861 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-23 20:40:44,861 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-23 20:40:44,862 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-23 20:40:44,862 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-23 20:40:44,862 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-23 20:40:44,862 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-23 20:40:44,862 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-23 20:40:44,862 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-23 20:40:44,862 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-23 20:40:44,862 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-23 20:40:44,863 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-23 20:40:44,863 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-23 20:40:44,863 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-23 20:40:44,863 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-23 20:40:44,863 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-23 20:40:44,863 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-23 20:40:44,863 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-23 20:40:44,864 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-23 20:40:44,864 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-23 20:40:44,864 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-23 20:40:44,864 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-23 20:40:44,864 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-23 20:40:44,864 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-23 20:40:44,864 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-23 20:40:44,865 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-23 20:40:44,865 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-23 20:40:44,865 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-23 20:40:44,865 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-23 20:40:44,865 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-23 20:40:44,865 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-23 20:40:44,866 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-23 20:40:44,866 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-23 20:40:44,866 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-23 20:40:44,866 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-23 20:40:44,866 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-23 20:40:44,866 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-23 20:40:44,866 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-23 20:40:44,867 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-10-23 20:40:44,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 20:40:44,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 20:40:44,867 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-10-23 20:40:44,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 20:40:44,867 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-10-23 20:40:44,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:40:44,868 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:40:44,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:40:44,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:40:44,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:40:44,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:40:44,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:40:45,277 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-23 20:40:45,549 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:40:45,550 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-23 20:40:45,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:40:45 BoogieIcfgContainer [2020-10-23 20:40:45,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:40:45,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:40:45,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:40:45,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:40:45,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:40:44" (1/3) ... [2020-10-23 20:40:45,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11abc4cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:40:45, skipping insertion in model container [2020-10-23 20:40:45,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:40:44" (2/3) ... [2020-10-23 20:40:45,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11abc4cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:40:45, skipping insertion in model container [2020-10-23 20:40:45,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:40:45" (3/3) ... [2020-10-23 20:40:45,570 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2020-10-23 20:40:45,584 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:40:45,597 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:40:45,612 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:40:45,654 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:40:45,654 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:40:45,654 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:40:45,654 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:40:45,654 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:40:45,654 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:40:45,655 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:40:45,655 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:40:45,677 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states. [2020-10-23 20:40:45,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-23 20:40:45,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:40:45,691 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:40:45,692 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:40:45,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:40:45,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1821326867, now seen corresponding path program 1 times [2020-10-23 20:40:45,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:40:45,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709097697] [2020-10-23 20:40:45,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:40:45,798 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:40:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:45,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:40:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:45,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:40:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:45,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-23 20:40:45,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:45,997 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 20:40:45,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709097697] [2020-10-23 20:40:46,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:40:46,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:40:46,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606793789] [2020-10-23 20:40:46,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:40:46,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:40:46,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:40:46,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:40:46,023 INFO L87 Difference]: Start difference. First operand 85 states. Second operand 4 states. [2020-10-23 20:40:46,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:40:46,329 INFO L93 Difference]: Finished difference Result 165 states and 199 transitions. [2020-10-23 20:40:46,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:40:46,331 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-23 20:40:46,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:40:46,341 INFO L225 Difference]: With dead ends: 165 [2020-10-23 20:40:46,341 INFO L226 Difference]: Without dead ends: 73 [2020-10-23 20:40:46,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:40:46,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-23 20:40:46,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2020-10-23 20:40:46,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-23 20:40:46,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-10-23 20:40:46,410 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 35 [2020-10-23 20:40:46,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:40:46,411 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-10-23 20:40:46,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:40:46,411 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-10-23 20:40:46,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 20:40:46,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:40:46,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:40:46,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:40:46,414 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:40:46,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:40:46,414 INFO L82 PathProgramCache]: Analyzing trace with hash 937008902, now seen corresponding path program 1 times [2020-10-23 20:40:46,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:40:46,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593375235] [2020-10-23 20:40:46,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:40:46,421 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:40:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:46,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:40:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:46,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 20:40:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:46,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-23 20:40:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:46,569 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 20:40:46,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593375235] [2020-10-23 20:40:46,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:40:46,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:40:46,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561536103] [2020-10-23 20:40:46,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:40:46,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:40:46,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:40:46,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:40:46,573 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 6 states. [2020-10-23 20:40:46,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:40:46,970 INFO L93 Difference]: Finished difference Result 148 states and 162 transitions. [2020-10-23 20:40:46,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 20:40:46,971 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-10-23 20:40:46,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:40:46,974 INFO L225 Difference]: With dead ends: 148 [2020-10-23 20:40:46,974 INFO L226 Difference]: Without dead ends: 99 [2020-10-23 20:40:46,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:40:46,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-23 20:40:46,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 63. [2020-10-23 20:40:46,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-23 20:40:46,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-10-23 20:40:46,992 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 39 [2020-10-23 20:40:46,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:40:46,993 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-10-23 20:40:46,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:40:46,993 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-10-23 20:40:46,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-23 20:40:46,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:40:46,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:40:46,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:40:46,995 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:40:46,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:40:46,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1587017737, now seen corresponding path program 1 times [2020-10-23 20:40:46,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:40:46,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632748343] [2020-10-23 20:40:46,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:40:47,001 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:40:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:47,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:40:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:47,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 20:40:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:47,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-23 20:40:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:47,157 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 20:40:47,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632748343] [2020-10-23 20:40:47,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:40:47,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 20:40:47,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650776084] [2020-10-23 20:40:47,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 20:40:47,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:40:47,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 20:40:47,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:40:47,160 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 7 states. [2020-10-23 20:40:47,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:40:47,561 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2020-10-23 20:40:47,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 20:40:47,561 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-10-23 20:40:47,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:40:47,563 INFO L225 Difference]: With dead ends: 120 [2020-10-23 20:40:47,563 INFO L226 Difference]: Without dead ends: 98 [2020-10-23 20:40:47,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-23 20:40:47,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-23 20:40:47,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 73. [2020-10-23 20:40:47,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-23 20:40:47,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2020-10-23 20:40:47,582 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 41 [2020-10-23 20:40:47,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:40:47,583 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2020-10-23 20:40:47,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 20:40:47,583 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2020-10-23 20:40:47,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-23 20:40:47,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:40:47,586 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:40:47,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:40:47,586 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:40:47,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:40:47,587 INFO L82 PathProgramCache]: Analyzing trace with hash -2090405153, now seen corresponding path program 1 times [2020-10-23 20:40:47,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:40:47,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575045737] [2020-10-23 20:40:47,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:40:47,837 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:40:47,842 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:40:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:47,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:40:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:47,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 20:40:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:47,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-23 20:40:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:48,037 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 20:40:48,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575045737] [2020-10-23 20:40:48,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:40:48,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 20:40:48,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642454522] [2020-10-23 20:40:48,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 20:40:48,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:40:48,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 20:40:48,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-23 20:40:48,041 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand 8 states. [2020-10-23 20:40:48,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:40:48,672 INFO L93 Difference]: Finished difference Result 172 states and 190 transitions. [2020-10-23 20:40:48,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 20:40:48,673 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-10-23 20:40:48,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:40:48,675 INFO L225 Difference]: With dead ends: 172 [2020-10-23 20:40:48,675 INFO L226 Difference]: Without dead ends: 119 [2020-10-23 20:40:48,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-10-23 20:40:48,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-23 20:40:48,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 80. [2020-10-23 20:40:48,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-23 20:40:48,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2020-10-23 20:40:48,696 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 49 [2020-10-23 20:40:48,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:40:48,696 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2020-10-23 20:40:48,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 20:40:48,696 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2020-10-23 20:40:48,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-23 20:40:48,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:40:48,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:40:48,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:40:48,698 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:40:48,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:40:48,699 INFO L82 PathProgramCache]: Analyzing trace with hash 475045390, now seen corresponding path program 1 times [2020-10-23 20:40:48,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:40:48,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096333572] [2020-10-23 20:40:48,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:40:48,816 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:40:48,892 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:40:48,896 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:40:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:48,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:40:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:48,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 20:40:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:49,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 20:40:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:49,110 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 20:40:49,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096333572] [2020-10-23 20:40:49,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:40:49,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 20:40:49,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700194962] [2020-10-23 20:40:49,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 20:40:49,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:40:49,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 20:40:49,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-23 20:40:49,114 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 12 states. [2020-10-23 20:40:49,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:40:49,809 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2020-10-23 20:40:49,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 20:40:49,814 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-23 20:40:49,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:40:49,819 INFO L225 Difference]: With dead ends: 108 [2020-10-23 20:40:49,819 INFO L226 Difference]: Without dead ends: 101 [2020-10-23 20:40:49,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-10-23 20:40:49,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-23 20:40:49,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 87. [2020-10-23 20:40:49,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-23 20:40:49,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2020-10-23 20:40:49,867 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 50 [2020-10-23 20:40:49,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:40:49,872 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2020-10-23 20:40:49,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 20:40:49,872 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2020-10-23 20:40:49,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-23 20:40:49,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:40:49,874 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:40:49,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 20:40:49,875 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:40:49,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:40:49,875 INFO L82 PathProgramCache]: Analyzing trace with hash -65029726, now seen corresponding path program 1 times [2020-10-23 20:40:49,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:40:49,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902184438] [2020-10-23 20:40:49,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:40:50,340 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:40:50,344 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:40:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:50,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:40:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:50,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-23 20:40:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:50,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-23 20:40:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:50,476 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 20:40:50,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902184438] [2020-10-23 20:40:50,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:40:50,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 20:40:50,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309853710] [2020-10-23 20:40:50,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 20:40:50,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:40:50,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 20:40:50,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:40:50,478 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand 9 states. [2020-10-23 20:40:51,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:40:51,197 INFO L93 Difference]: Finished difference Result 148 states and 162 transitions. [2020-10-23 20:40:51,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 20:40:51,197 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-10-23 20:40:51,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:40:51,199 INFO L225 Difference]: With dead ends: 148 [2020-10-23 20:40:51,200 INFO L226 Difference]: Without dead ends: 122 [2020-10-23 20:40:51,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-23 20:40:51,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-23 20:40:51,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 90. [2020-10-23 20:40:51,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-23 20:40:51,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2020-10-23 20:40:51,244 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 51 [2020-10-23 20:40:51,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:40:51,244 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2020-10-23 20:40:51,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 20:40:51,245 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2020-10-23 20:40:51,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-23 20:40:51,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:40:51,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:40:51,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 20:40:51,247 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:40:51,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:40:51,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1343250501, now seen corresponding path program 1 times [2020-10-23 20:40:51,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:40:51,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830435243] [2020-10-23 20:40:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:40:51,363 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:40:51,458 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:40:51,461 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:40:51,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:51,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:40:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:51,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 20:40:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:51,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 20:40:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:51,603 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 20:40:51,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830435243] [2020-10-23 20:40:51,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:40:51,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 20:40:51,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656625516] [2020-10-23 20:40:51,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 20:40:51,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:40:51,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 20:40:51,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:40:51,606 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand 9 states. [2020-10-23 20:40:52,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:40:52,154 INFO L93 Difference]: Finished difference Result 149 states and 163 transitions. [2020-10-23 20:40:52,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 20:40:52,155 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-23 20:40:52,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:40:52,157 INFO L225 Difference]: With dead ends: 149 [2020-10-23 20:40:52,157 INFO L226 Difference]: Without dead ends: 123 [2020-10-23 20:40:52,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-23 20:40:52,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-23 20:40:52,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 105. [2020-10-23 20:40:52,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-23 20:40:52,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-10-23 20:40:52,182 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 57 [2020-10-23 20:40:52,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:40:52,182 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-10-23 20:40:52,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 20:40:52,183 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-10-23 20:40:52,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-23 20:40:52,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:40:52,184 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:40:52,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 20:40:52,184 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:40:52,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:40:52,185 INFO L82 PathProgramCache]: Analyzing trace with hash -561771656, now seen corresponding path program 2 times [2020-10-23 20:40:52,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:40:52,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018400051] [2020-10-23 20:40:52,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:40:53,003 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:40:53,006 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:40:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:53,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:40:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:53,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 20:40:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:53,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-23 20:40:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:53,185 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 20:40:53,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018400051] [2020-10-23 20:40:53,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:40:53,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 20:40:53,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144464539] [2020-10-23 20:40:53,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 20:40:53,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:40:53,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 20:40:53,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:40:53,187 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 10 states. [2020-10-23 20:40:54,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:40:54,138 INFO L93 Difference]: Finished difference Result 226 states and 255 transitions. [2020-10-23 20:40:54,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-23 20:40:54,138 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-23 20:40:54,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:40:54,140 INFO L225 Difference]: With dead ends: 226 [2020-10-23 20:40:54,141 INFO L226 Difference]: Without dead ends: 154 [2020-10-23 20:40:54,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2020-10-23 20:40:54,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-23 20:40:54,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 112. [2020-10-23 20:40:54,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-23 20:40:54,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 124 transitions. [2020-10-23 20:40:54,169 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 124 transitions. Word has length 59 [2020-10-23 20:40:54,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:40:54,169 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 124 transitions. [2020-10-23 20:40:54,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 20:40:54,170 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 124 transitions. [2020-10-23 20:40:54,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-23 20:40:54,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:40:54,171 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:40:54,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 20:40:54,171 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:40:54,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:40:54,172 INFO L82 PathProgramCache]: Analyzing trace with hash 72945659, now seen corresponding path program 2 times [2020-10-23 20:40:54,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:40:54,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790904014] [2020-10-23 20:40:54,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:40:54,910 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:40:54,913 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:40:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:54,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:40:54,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:55,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-23 20:40:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:55,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-23 20:40:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:55,059 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 20:40:55,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790904014] [2020-10-23 20:40:55,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:40:55,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-23 20:40:55,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66244] [2020-10-23 20:40:55,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 20:40:55,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:40:55,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 20:40:55,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-23 20:40:55,061 INFO L87 Difference]: Start difference. First operand 112 states and 124 transitions. Second operand 11 states. [2020-10-23 20:40:55,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:40:55,924 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2020-10-23 20:40:55,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 20:40:55,924 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-10-23 20:40:55,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:40:55,926 INFO L225 Difference]: With dead ends: 149 [2020-10-23 20:40:55,926 INFO L226 Difference]: Without dead ends: 117 [2020-10-23 20:40:55,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-10-23 20:40:55,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-23 20:40:55,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 100. [2020-10-23 20:40:55,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-23 20:40:55,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2020-10-23 20:40:55,946 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 61 [2020-10-23 20:40:55,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:40:55,947 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2020-10-23 20:40:55,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 20:40:55,947 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2020-10-23 20:40:55,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-23 20:40:55,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:40:55,948 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:40:55,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 20:40:55,948 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:40:55,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:40:55,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1225942080, now seen corresponding path program 2 times [2020-10-23 20:40:55,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:40:55,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928318540] [2020-10-23 20:40:55,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:40:56,303 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:40:56,465 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:40:56,622 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:40:56,953 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:40:57,125 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-23 20:40:57,285 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:40:57,342 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:40:57,344 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:40:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:57,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:40:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:57,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 20:40:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:57,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-23 20:40:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:57,690 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 20:40:57,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928318540] [2020-10-23 20:40:57,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:40:57,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-23 20:40:57,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576027955] [2020-10-23 20:40:57,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 20:40:57,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:40:57,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 20:40:57,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-23 20:40:57,692 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand 17 states. [2020-10-23 20:40:58,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:40:58,889 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2020-10-23 20:40:58,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-23 20:40:58,889 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-10-23 20:40:58,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:40:58,891 INFO L225 Difference]: With dead ends: 134 [2020-10-23 20:40:58,891 INFO L226 Difference]: Without dead ends: 127 [2020-10-23 20:40:58,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2020-10-23 20:40:58,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-23 20:40:58,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 113. [2020-10-23 20:40:58,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-23 20:40:58,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2020-10-23 20:40:58,921 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 66 [2020-10-23 20:40:58,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:40:58,923 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2020-10-23 20:40:58,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 20:40:58,923 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2020-10-23 20:40:58,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-23 20:40:58,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:40:58,924 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:40:58,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 20:40:58,925 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:40:58,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:40:58,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1520758956, now seen corresponding path program 1 times [2020-10-23 20:40:58,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:40:58,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17455289] [2020-10-23 20:40:58,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:40:59,157 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:40:59,512 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:40:59,514 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:40:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:59,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:40:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:59,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-23 20:40:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:59,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-23 20:40:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:59,681 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 20:40:59,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17455289] [2020-10-23 20:40:59,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:40:59,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-23 20:40:59,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403413073] [2020-10-23 20:40:59,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 20:40:59,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:40:59,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 20:40:59,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-23 20:40:59,684 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 11 states. [2020-10-23 20:41:00,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:41:00,366 INFO L93 Difference]: Finished difference Result 170 states and 184 transitions. [2020-10-23 20:41:00,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 20:41:00,366 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-10-23 20:41:00,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:41:00,368 INFO L225 Difference]: With dead ends: 170 [2020-10-23 20:41:00,368 INFO L226 Difference]: Without dead ends: 137 [2020-10-23 20:41:00,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-23 20:41:00,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-23 20:41:00,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 113. [2020-10-23 20:41:00,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-23 20:41:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2020-10-23 20:41:00,392 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 67 [2020-10-23 20:41:00,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:41:00,392 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2020-10-23 20:41:00,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 20:41:00,393 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2020-10-23 20:41:00,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-23 20:41:00,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:41:00,394 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:41:00,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 20:41:00,394 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:41:00,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:41:00,395 INFO L82 PathProgramCache]: Analyzing trace with hash -239258167, now seen corresponding path program 3 times [2020-10-23 20:41:00,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:41:00,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786593759] [2020-10-23 20:41:00,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:41:00,510 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:41:00,675 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:41:00,837 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:41:01,009 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:41:01,177 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:41:01,875 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:41:02,032 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-23 20:41:02,086 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:41:02,089 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:41:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:41:02,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:41:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:41:02,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 20:41:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:41:02,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-23 20:41:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:41:02,313 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 20:41:02,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786593759] [2020-10-23 20:41:02,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:41:02,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-23 20:41:02,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714823083] [2020-10-23 20:41:02,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 20:41:02,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:41:02,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 20:41:02,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-23 20:41:02,316 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 11 states. [2020-10-23 20:41:02,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:41:02,863 INFO L93 Difference]: Finished difference Result 175 states and 189 transitions. [2020-10-23 20:41:02,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 20:41:02,864 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 73 [2020-10-23 20:41:02,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:41:02,865 INFO L225 Difference]: With dead ends: 175 [2020-10-23 20:41:02,865 INFO L226 Difference]: Without dead ends: 142 [2020-10-23 20:41:02,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-10-23 20:41:02,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-23 20:41:02,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 128. [2020-10-23 20:41:02,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-23 20:41:02,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 140 transitions. [2020-10-23 20:41:02,921 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 140 transitions. Word has length 73 [2020-10-23 20:41:02,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:41:02,922 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 140 transitions. [2020-10-23 20:41:02,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 20:41:02,922 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 140 transitions. [2020-10-23 20:41:02,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-23 20:41:02,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:41:02,924 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:41:02,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 20:41:02,924 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:41:02,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:41:02,924 INFO L82 PathProgramCache]: Analyzing trace with hash 926323629, now seen corresponding path program 2 times [2020-10-23 20:41:02,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:41:02,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842000448] [2020-10-23 20:41:02,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:41:03,229 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:41:03,861 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:41:03,864 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:41:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:41:03,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:41:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:41:04,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-23 20:41:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:41:04,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-23 20:41:04,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:41:04,089 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 20:41:04,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842000448] [2020-10-23 20:41:04,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:41:04,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-23 20:41:04,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430464898] [2020-10-23 20:41:04,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 20:41:04,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:41:04,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 20:41:04,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-23 20:41:04,091 INFO L87 Difference]: Start difference. First operand 128 states and 140 transitions. Second operand 13 states. [2020-10-23 20:41:05,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:41:05,047 INFO L93 Difference]: Finished difference Result 172 states and 185 transitions. [2020-10-23 20:41:05,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-23 20:41:05,047 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-10-23 20:41:05,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:41:05,048 INFO L225 Difference]: With dead ends: 172 [2020-10-23 20:41:05,049 INFO L226 Difference]: Without dead ends: 133 [2020-10-23 20:41:05,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-10-23 20:41:05,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-23 20:41:05,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 116. [2020-10-23 20:41:05,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-23 20:41:05,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2020-10-23 20:41:05,070 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 77 [2020-10-23 20:41:05,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:41:05,071 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2020-10-23 20:41:05,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 20:41:05,071 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2020-10-23 20:41:05,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-23 20:41:05,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:41:05,072 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:41:05,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 20:41:05,072 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:41:05,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:41:05,073 INFO L82 PathProgramCache]: Analyzing trace with hash 680822734, now seen corresponding path program 4 times [2020-10-23 20:41:05,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:41:05,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119729159] [2020-10-23 20:41:05,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:41:05,183 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:41:05,350 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:41:05,520 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:41:05,689 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:41:05,850 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:41:06,526 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:41:06,728 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:41:06,731 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:41:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:41:06,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:41:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:41:06,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 20:41:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:41:06,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-23 20:41:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:41:06,992 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 20:41:06,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119729159] [2020-10-23 20:41:06,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:41:06,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 20:41:06,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324524811] [2020-10-23 20:41:06,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 20:41:06,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:41:06,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 20:41:06,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-23 20:41:06,994 INFO L87 Difference]: Start difference. First operand 116 states and 123 transitions. Second operand 12 states. [2020-10-23 20:41:07,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:41:07,852 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2020-10-23 20:41:07,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 20:41:07,853 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-10-23 20:41:07,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:41:07,854 INFO L225 Difference]: With dead ends: 142 [2020-10-23 20:41:07,854 INFO L226 Difference]: Without dead ends: 135 [2020-10-23 20:41:07,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-23 20:41:07,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-23 20:41:07,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 129. [2020-10-23 20:41:07,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-23 20:41:07,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2020-10-23 20:41:07,880 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 82 [2020-10-23 20:41:07,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:41:07,880 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2020-10-23 20:41:07,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 20:41:07,880 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2020-10-23 20:41:07,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-23 20:41:07,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:41:07,881 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:41:07,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 20:41:07,882 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:41:07,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:41:07,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1913629854, now seen corresponding path program 3 times [2020-10-23 20:41:07,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:41:07,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49130993] [2020-10-23 20:41:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:41:07,997 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:41:08,168 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:41:08,340 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:41:08,502 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:41:08,844 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:41:09,745 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:41:09,907 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-23 20:41:09,958 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:41:09,961 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:41:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:41:10,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:41:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:41:10,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-23 20:41:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:41:10,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-23 20:41:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:41:10,171 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 20:41:10,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49130993] [2020-10-23 20:41:10,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:41:10,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-23 20:41:10,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547689076] [2020-10-23 20:41:10,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 20:41:10,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:41:10,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 20:41:10,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-23 20:41:10,174 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand 13 states. [2020-10-23 20:41:11,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:41:11,037 INFO L93 Difference]: Finished difference Result 190 states and 204 transitions. [2020-10-23 20:41:11,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 20:41:11,037 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 83 [2020-10-23 20:41:11,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:41:11,039 INFO L225 Difference]: With dead ends: 190 [2020-10-23 20:41:11,039 INFO L226 Difference]: Without dead ends: 150 [2020-10-23 20:41:11,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2020-10-23 20:41:11,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-23 20:41:11,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 132. [2020-10-23 20:41:11,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-23 20:41:11,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2020-10-23 20:41:11,066 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 83 [2020-10-23 20:41:11,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:41:11,067 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2020-10-23 20:41:11,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 20:41:11,067 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2020-10-23 20:41:11,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-23 20:41:11,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:41:11,068 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:41:11,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 20:41:11,069 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:41:11,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:41:11,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1123729925, now seen corresponding path program 5 times [2020-10-23 20:41:11,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:41:11,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385411365] [2020-10-23 20:41:11,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:41:11,179 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:41:11,342 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:41:11,506 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:41:11,669 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:41:11,833 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-23 20:41:12,677 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-23 20:41:12,725 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:41:12,728 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:41:12,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:41:12,760 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:41:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:41:12,803 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:41:12,861 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:41:12,861 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:41:12,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 20:41:12,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:41:12 BoogieIcfgContainer [2020-10-23 20:41:12,890 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:41:12,895 INFO L168 Benchmark]: Toolchain (without parser) took 28794.99 ms. Allocated memory was 164.6 MB in the beginning and 425.7 MB in the end (delta: 261.1 MB). Free memory was 121.6 MB in the beginning and 306.0 MB in the end (delta: -184.4 MB). Peak memory consumption was 77.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:41:12,895 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 164.6 MB. Free memory is still 139.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:41:12,896 INFO L168 Benchmark]: CACSL2BoogieTranslator took 593.73 ms. Allocated memory is still 164.6 MB. Free memory was 121.1 MB in the beginning and 136.0 MB in the end (delta: -15.0 MB). Peak memory consumption was 5.9 MB. Max. memory is 8.0 GB. [2020-10-23 20:41:12,896 INFO L168 Benchmark]: Boogie Preprocessor took 76.40 ms. Allocated memory is still 164.6 MB. Free memory was 136.0 MB in the beginning and 133.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:41:12,900 INFO L168 Benchmark]: RCFGBuilder took 775.27 ms. Allocated memory was 164.6 MB in the beginning and 204.5 MB in the end (delta: 39.8 MB). Free memory was 133.4 MB in the beginning and 171.7 MB in the end (delta: -38.3 MB). Peak memory consumption was 34.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:41:12,900 INFO L168 Benchmark]: TraceAbstraction took 27332.76 ms. Allocated memory was 204.5 MB in the beginning and 425.7 MB in the end (delta: 221.2 MB). Free memory was 171.2 MB in the beginning and 306.0 MB in the end (delta: -134.9 MB). Peak memory consumption was 86.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:41:12,906 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 164.6 MB. Free memory is still 139.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 593.73 ms. Allocated memory is still 164.6 MB. Free memory was 121.1 MB in the beginning and 136.0 MB in the end (delta: -15.0 MB). Peak memory consumption was 5.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 76.40 ms. Allocated memory is still 164.6 MB. Free memory was 136.0 MB in the beginning and 133.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 775.27 ms. Allocated memory was 164.6 MB in the beginning and 204.5 MB in the end (delta: 39.8 MB). Free memory was 133.4 MB in the beginning and 171.7 MB in the end (delta: -38.3 MB). Peak memory consumption was 34.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 27332.76 ms. Allocated memory was 204.5 MB in the beginning and 425.7 MB in the end (delta: 221.2 MB). Free memory was 171.2 MB in the beginning and 306.0 MB in the end (delta: -134.9 MB). Peak memory consumption was 86.4 MB. 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: [L603] int len = 2; [L604] len < 32 && __VERIFIER_nondet_int() [L604] len < 32 && __VERIFIER_nondet_int() [L604] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L607] CALL, EXPR sll_create(len + 1) [L575] SLL head = ((void *)0); [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) [L581] new_head->next = head [L582] head = new_head [L583] len-- [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) [L581] new_head->next = head [L582] head = new_head [L583] len-- [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) [L581] new_head->next = head [L582] head = new_head [L583] len-- [L576] COND FALSE !(len > 0) [L585] return head; [L607] RET, EXPR sll_create(len + 1) [L607] SLL s = sll_create(len + 1); [L608] CALL, EXPR sll_length(s) [L588] int len = 0; [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND FALSE !(\read(head)) [L593] return len; [L608] RET, EXPR sll_length(s) [L608] COND TRUE len != sll_length(s) [L613] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sll_length_check-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 96 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 27.2s, OverallIterations: 16, TraceHistogramMax: 3, AutomataDifference: 10.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1036 SDtfs, 2207 SDslu, 2780 SDs, 0 SdLazy, 5529 SolverSat, 441 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 349 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 5.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=132occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 15 MinimizatonAttempts, 328 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...