/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 0.2.1-dev-36cd7be [2021-02-23 18:10:37,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:10:37,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:10:37,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 18:10:37,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 18:10:37,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 18:10:37,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 18:10:37,457 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 18:10:37,459 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 18:10:37,461 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 18:10:37,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 18:10:37,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 18:10:37,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:10:37,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:10:37,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:10:37,469 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:10:37,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:10:37,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:10:37,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:10:37,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:10:37,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:10:37,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:10:37,514 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:10:37,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:10:37,518 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 18:10:37,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 18:10:37,519 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 18:10:37,520 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 18:10:37,521 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 18:10:37,522 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-23 18:10:37,522 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 18:10:37,523 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 18:10:37,524 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 18:10:37,525 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 18:10:37,527 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 18:10:37,527 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 18:10:37,528 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 18:10:37,528 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 18:10:37,529 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:10:37,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:10:37,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:10:37,535 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 18:10:37,559 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:10:37,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:10:37,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:10:37,564 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:10:37,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:10:37,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:10:37,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:10:37,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:10:37,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:10:37,566 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:10:37,567 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:10:37,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:10:37,567 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:10:37,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:10:37,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:10:37,568 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:10:37,568 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:10:37,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:10:37,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:10:37,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:10:37,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:10:37,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:10:37,569 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:10:37,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:10:37,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:10:37,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:10:37,994 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:10:37,995 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:10:37,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2021-02-23 18:10:38,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b85f61b8/cf5f0a03b2af4e1684814bd9d4168906/FLAG1d7d341a9 [2021-02-23 18:10:38,769 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:10:38,769 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2021-02-23 18:10:38,784 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b85f61b8/cf5f0a03b2af4e1684814bd9d4168906/FLAG1d7d341a9 [2021-02-23 18:10:39,061 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b85f61b8/cf5f0a03b2af4e1684814bd9d4168906 [2021-02-23 18:10:39,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:10:39,079 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:10:39,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:10:39,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:10:39,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:10:39,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:10:39" (1/1) ... [2021-02-23 18:10:39,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25fa8175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:39, skipping insertion in model container [2021-02-23 18:10:39,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:10:39" (1/1) ... [2021-02-23 18:10:39,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:10:39,136 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:10:39,515 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i[23818,23831] [2021-02-23 18:10:39,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:10:39,530 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:10:39,572 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i[23818,23831] [2021-02-23 18:10:39,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:10:39,634 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:10:39,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:39 WrapperNode [2021-02-23 18:10:39,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:10:39,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:10:39,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:10:39,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:10:39,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:39" (1/1) ... [2021-02-23 18:10:39,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:39" (1/1) ... [2021-02-23 18:10:39,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:39" (1/1) ... [2021-02-23 18:10:39,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:39" (1/1) ... [2021-02-23 18:10:39,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:39" (1/1) ... [2021-02-23 18:10:39,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:39" (1/1) ... [2021-02-23 18:10:39,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:39" (1/1) ... [2021-02-23 18:10:39,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:10:39,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:10:39,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:10:39,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:10:39,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:10:39,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:10:39,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:10:39,954 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:10:39,954 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-02-23 18:10:39,954 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-02-23 18:10:39,954 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-02-23 18:10:39,954 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2021-02-23 18:10:39,954 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2021-02-23 18:10:39,955 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2021-02-23 18:10:39,955 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:10:39,956 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:10:39,956 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:10:39,956 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-23 18:10:39,956 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-23 18:10:39,957 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:10:39,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:10:39,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 18:10:39,958 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-02-23 18:10:39,959 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-02-23 18:10:39,959 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-23 18:10:39,962 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-23 18:10:39,962 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-23 18:10:39,963 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-23 18:10:39,963 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-23 18:10:39,963 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-23 18:10:39,963 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-23 18:10:39,963 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-23 18:10:39,963 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-23 18:10:39,964 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-23 18:10:39,964 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-23 18:10:39,964 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-23 18:10:39,964 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-23 18:10:39,964 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-23 18:10:39,964 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-23 18:10:39,965 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-23 18:10:39,965 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-23 18:10:39,965 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-23 18:10:39,965 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-23 18:10:39,965 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-23 18:10:39,965 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-23 18:10:39,965 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-23 18:10:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-23 18:10:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-23 18:10:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-23 18:10:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-23 18:10:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-23 18:10:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-23 18:10:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-23 18:10:39,967 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-23 18:10:39,967 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-23 18:10:39,967 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-23 18:10:39,967 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-23 18:10:39,967 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-23 18:10:39,967 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-23 18:10:39,968 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-23 18:10:39,968 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-23 18:10:39,968 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-23 18:10:39,968 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-23 18:10:39,968 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-23 18:10:39,969 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-23 18:10:39,970 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-23 18:10:39,970 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-23 18:10:39,970 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-23 18:10:39,970 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-23 18:10:39,970 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-23 18:10:39,971 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-23 18:10:39,971 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-23 18:10:39,971 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-23 18:10:39,971 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-23 18:10:39,971 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-23 18:10:39,971 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-23 18:10:39,971 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-23 18:10:39,972 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-23 18:10:39,972 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-02-23 18:10:39,972 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-23 18:10:39,973 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-23 18:10:39,973 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-23 18:10:39,973 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-02-23 18:10:39,974 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-23 18:10:39,974 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-02-23 18:10:39,974 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-23 18:10:39,974 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-23 18:10:39,974 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-02-23 18:10:39,975 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-23 18:10:39,975 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-23 18:10:39,976 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-23 18:10:39,977 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-23 18:10:39,977 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-23 18:10:39,977 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-23 18:10:39,977 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-23 18:10:39,978 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-23 18:10:39,978 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-23 18:10:39,979 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-23 18:10:39,979 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-23 18:10:39,979 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-23 18:10:39,980 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-23 18:10:39,980 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-23 18:10:39,980 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-23 18:10:39,980 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-23 18:10:39,980 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-23 18:10:39,980 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-23 18:10:39,980 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-23 18:10:39,981 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-23 18:10:39,981 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-23 18:10:39,981 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-23 18:10:39,981 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-23 18:10:39,981 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-23 18:10:39,981 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-23 18:10:39,981 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-23 18:10:39,982 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-23 18:10:39,982 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-23 18:10:39,982 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-23 18:10:39,982 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-23 18:10:39,982 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-23 18:10:39,982 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-23 18:10:39,982 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-23 18:10:39,983 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-23 18:10:39,983 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-23 18:10:39,983 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-23 18:10:39,983 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-23 18:10:39,983 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-23 18:10:39,983 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-02-23 18:10:39,983 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2021-02-23 18:10:39,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-23 18:10:39,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-23 18:10:39,985 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2021-02-23 18:10:39,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-23 18:10:39,985 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2021-02-23 18:10:39,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:10:39,985 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:10:39,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:10:39,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:10:39,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:10:39,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:10:39,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:10:40,434 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-02-23 18:10:40,643 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:10:40,643 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-02-23 18:10:40,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:10:40 BoogieIcfgContainer [2021-02-23 18:10:40,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:10:40,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:10:40,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:10:40,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:10:40,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:10:39" (1/3) ... [2021-02-23 18:10:40,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe845c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:10:40, skipping insertion in model container [2021-02-23 18:10:40,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:39" (2/3) ... [2021-02-23 18:10:40,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe845c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:10:40, skipping insertion in model container [2021-02-23 18:10:40,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:10:40" (3/3) ... [2021-02-23 18:10:40,676 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2021-02-23 18:10:40,686 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:10:40,693 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:10:40,718 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:10:40,765 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:10:40,765 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:10:40,766 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:10:40,766 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:10:40,766 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:10:40,766 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:10:40,766 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:10:40,767 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:10:40,793 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states. [2021-02-23 18:10:40,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-23 18:10:40,811 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:40,812 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] [2021-02-23 18:10:40,813 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:40,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:40,824 INFO L82 PathProgramCache]: Analyzing trace with hash -280906633, now seen corresponding path program 1 times [2021-02-23 18:10:40,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:40,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146714862] [2021-02-23 18:10:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:40,947 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:41,132 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:41,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:41,135 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:41,136 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:41,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:41,193 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:41,195 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:41,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 18:10:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:41,255 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:41,256 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:41,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-02-23 18:10:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:41,265 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:41,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:41,267 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:41,268 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:41,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146714862] [2021-02-23 18:10:41,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:41,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 18:10:41,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061962488] [2021-02-23 18:10:41,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 18:10:41,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:41,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 18:10:41,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:10:41,326 INFO L87 Difference]: Start difference. First operand 80 states. Second operand 4 states. [2021-02-23 18:10:41,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:41,731 INFO L93 Difference]: Finished difference Result 159 states and 189 transitions. [2021-02-23 18:10:41,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 18:10:41,733 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2021-02-23 18:10:41,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:41,743 INFO L225 Difference]: With dead ends: 159 [2021-02-23 18:10:41,743 INFO L226 Difference]: Without dead ends: 72 [2021-02-23 18:10:41,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 18:10:41,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-02-23 18:10:41,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2021-02-23 18:10:41,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-02-23 18:10:41,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-02-23 18:10:41,807 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 33 [2021-02-23 18:10:41,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:41,808 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-02-23 18:10:41,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 18:10:41,808 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-02-23 18:10:41,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-23 18:10:41,810 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:41,810 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] [2021-02-23 18:10:41,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:10:41,810 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:41,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:41,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1331532656, now seen corresponding path program 1 times [2021-02-23 18:10:41,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:41,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961699533] [2021-02-23 18:10:41,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:41,817 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:41,879 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:41,880 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:41,880 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:41,881 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:41,894 WARN L141 QuantifierPusher]: treesize reduction 10, result has 9.1 percent of original size [2021-02-23 18:10:41,895 WARN L147 QuantifierPusher]: treesize reduction 10, result has 9.1 percent of original size 1 [2021-02-23 18:10:41,905 WARN L141 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-02-23 18:10:41,908 WARN L147 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size 1 [2021-02-23 18:10:41,910 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:41,911 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:41,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:41,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:41,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:41,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-23 18:10:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:42,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:42,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-23 18:10:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:42,036 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,037 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:42,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961699533] [2021-02-23 18:10:42,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:42,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 18:10:42,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907569391] [2021-02-23 18:10:42,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 18:10:42,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:42,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 18:10:42,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 18:10:42,043 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 6 states. [2021-02-23 18:10:42,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:42,531 INFO L93 Difference]: Finished difference Result 147 states and 158 transitions. [2021-02-23 18:10:42,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 18:10:42,532 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2021-02-23 18:10:42,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:42,536 INFO L225 Difference]: With dead ends: 147 [2021-02-23 18:10:42,536 INFO L226 Difference]: Without dead ends: 100 [2021-02-23 18:10:42,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-02-23 18:10:42,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-02-23 18:10:42,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 61. [2021-02-23 18:10:42,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-02-23 18:10:42,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-02-23 18:10:42,580 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 37 [2021-02-23 18:10:42,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:42,581 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-02-23 18:10:42,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 18:10:42,584 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-02-23 18:10:42,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-23 18:10:42,585 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:42,585 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] [2021-02-23 18:10:42,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:10:42,586 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:42,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:42,586 INFO L82 PathProgramCache]: Analyzing trace with hash 2056387251, now seen corresponding path program 1 times [2021-02-23 18:10:42,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:42,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915897205] [2021-02-23 18:10:42,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:42,593 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:42,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:42,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,644 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:42,648 WARN L141 QuantifierPusher]: treesize reduction 10, result has 9.1 percent of original size [2021-02-23 18:10:42,649 WARN L147 QuantifierPusher]: treesize reduction 10, result has 9.1 percent of original size 1 [2021-02-23 18:10:42,650 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,650 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:42,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:42,681 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:42,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-02-23 18:10:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:42,717 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,718 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:42,726 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,727 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:42,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 18:10:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:42,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:42,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:42,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915897205] [2021-02-23 18:10:42,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:42,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 18:10:42,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801585700] [2021-02-23 18:10:42,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 18:10:42,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:42,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 18:10:42,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 18:10:42,750 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 7 states. [2021-02-23 18:10:43,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:43,190 INFO L93 Difference]: Finished difference Result 118 states and 125 transitions. [2021-02-23 18:10:43,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 18:10:43,191 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2021-02-23 18:10:43,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:43,193 INFO L225 Difference]: With dead ends: 118 [2021-02-23 18:10:43,193 INFO L226 Difference]: Without dead ends: 98 [2021-02-23 18:10:43,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-02-23 18:10:43,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-02-23 18:10:43,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 71. [2021-02-23 18:10:43,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-02-23 18:10:43,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-02-23 18:10:43,212 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 39 [2021-02-23 18:10:43,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:43,212 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-02-23 18:10:43,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 18:10:43,213 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-02-23 18:10:43,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-23 18:10:43,215 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:43,215 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] [2021-02-23 18:10:43,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 18:10:43,216 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:43,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:43,216 INFO L82 PathProgramCache]: Analyzing trace with hash 320013449, now seen corresponding path program 1 times [2021-02-23 18:10:43,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:43,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970924289] [2021-02-23 18:10:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:43,250 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:43,255 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:43,322 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:43,323 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:43,323 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:43,324 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:43,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:43,332 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:43,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:43,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:43,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:43,344 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:43,350 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:43,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:43,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:43,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:43,382 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:43,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-02-23 18:10:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:43,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:43,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:43,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-02-23 18:10:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:43,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:43,417 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:43,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970924289] [2021-02-23 18:10:43,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:43,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 18:10:43,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618998207] [2021-02-23 18:10:43,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 18:10:43,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:43,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 18:10:43,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-23 18:10:43,423 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 8 states. [2021-02-23 18:10:44,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:44,031 INFO L93 Difference]: Finished difference Result 172 states and 186 transitions. [2021-02-23 18:10:44,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-23 18:10:44,032 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2021-02-23 18:10:44,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:44,038 INFO L225 Difference]: With dead ends: 172 [2021-02-23 18:10:44,038 INFO L226 Difference]: Without dead ends: 121 [2021-02-23 18:10:44,046 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 [2021-02-23 18:10:44,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-02-23 18:10:44,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 78. [2021-02-23 18:10:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-23 18:10:44,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2021-02-23 18:10:44,076 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 47 [2021-02-23 18:10:44,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:44,077 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2021-02-23 18:10:44,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 18:10:44,077 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2021-02-23 18:10:44,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-23 18:10:44,079 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:44,079 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] [2021-02-23 18:10:44,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 18:10:44,079 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:44,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:44,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1313506211, now seen corresponding path program 1 times [2021-02-23 18:10:44,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:44,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060952517] [2021-02-23 18:10:44,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:44,096 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:44,106 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:44,148 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:44,149 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:44,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:44,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:10:44,154 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:44,154 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:10:44,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:44,159 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:44,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:44,198 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:44,199 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:44,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-02-23 18:10:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:44,273 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:44,274 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:44,282 WARN L141 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-02-23 18:10:44,283 WARN L147 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size 9 [2021-02-23 18:10:44,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:44,300 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:10:44,319 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:44,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:10:44,338 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:44,341 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:10:44,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-02-23 18:10:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:44,382 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:44,382 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:44,399 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:44,400 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:44,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:44,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060952517] [2021-02-23 18:10:44,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:44,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-23 18:10:44,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972835802] [2021-02-23 18:10:44,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 18:10:44,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:44,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 18:10:44,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-02-23 18:10:44,445 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 12 states. [2021-02-23 18:10:45,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:45,219 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2021-02-23 18:10:45,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-23 18:10:45,220 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2021-02-23 18:10:45,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:45,223 INFO L225 Difference]: With dead ends: 105 [2021-02-23 18:10:45,223 INFO L226 Difference]: Without dead ends: 100 [2021-02-23 18:10:45,224 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 [2021-02-23 18:10:45,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-02-23 18:10:45,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 85. [2021-02-23 18:10:45,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-02-23 18:10:45,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 93 transitions. [2021-02-23 18:10:45,248 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 93 transitions. Word has length 48 [2021-02-23 18:10:45,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:45,248 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 93 transitions. [2021-02-23 18:10:45,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 18:10:45,249 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 93 transitions. [2021-02-23 18:10:45,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-23 18:10:45,250 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:45,251 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] [2021-02-23 18:10:45,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 18:10:45,251 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:45,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:45,252 INFO L82 PathProgramCache]: Analyzing trace with hash 54294636, now seen corresponding path program 1 times [2021-02-23 18:10:45,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:45,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138287191] [2021-02-23 18:10:45,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:45,259 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:45,263 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:45,291 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:45,292 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:45,293 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:45,293 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:45,297 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:45,297 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:45,302 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:45,303 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:45,308 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:45,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:45,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:45,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:45,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:45,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-23 18:10:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:45,360 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:45,361 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:45,369 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:45,370 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:45,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-02-23 18:10:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:45,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:45,386 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:45,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138287191] [2021-02-23 18:10:45,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:45,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 18:10:45,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155857088] [2021-02-23 18:10:45,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 18:10:45,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:45,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 18:10:45,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-23 18:10:45,398 INFO L87 Difference]: Start difference. First operand 85 states and 93 transitions. Second operand 9 states. [2021-02-23 18:10:46,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:46,084 INFO L93 Difference]: Finished difference Result 147 states and 158 transitions. [2021-02-23 18:10:46,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-23 18:10:46,085 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2021-02-23 18:10:46,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:46,087 INFO L225 Difference]: With dead ends: 147 [2021-02-23 18:10:46,087 INFO L226 Difference]: Without dead ends: 123 [2021-02-23 18:10:46,088 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 [2021-02-23 18:10:46,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-02-23 18:10:46,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 88. [2021-02-23 18:10:46,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-02-23 18:10:46,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2021-02-23 18:10:46,117 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 49 [2021-02-23 18:10:46,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:46,118 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2021-02-23 18:10:46,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 18:10:46,118 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2021-02-23 18:10:46,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-02-23 18:10:46,120 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:46,120 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] [2021-02-23 18:10:46,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 18:10:46,120 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:46,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:46,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1599784741, now seen corresponding path program 1 times [2021-02-23 18:10:46,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:46,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933873039] [2021-02-23 18:10:46,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:46,131 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:46,134 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:46,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:46,180 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:46,181 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:46,188 WARN L141 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-02-23 18:10:46,188 WARN L147 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size 1 [2021-02-23 18:10:46,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,189 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:46,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:46,219 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,219 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:46,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-02-23 18:10:46,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:46,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,261 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:46,268 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:46,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:46,290 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,291 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:46,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-02-23 18:10:46,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:46,308 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:46,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933873039] [2021-02-23 18:10:46,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:46,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 18:10:46,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209362134] [2021-02-23 18:10:46,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 18:10:46,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:46,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 18:10:46,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-02-23 18:10:46,320 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand 9 states. [2021-02-23 18:10:46,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:46,837 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2021-02-23 18:10:46,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-23 18:10:46,838 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2021-02-23 18:10:46,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:46,843 INFO L225 Difference]: With dead ends: 147 [2021-02-23 18:10:46,843 INFO L226 Difference]: Without dead ends: 123 [2021-02-23 18:10:46,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-02-23 18:10:46,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-02-23 18:10:46,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 103. [2021-02-23 18:10:46,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-02-23 18:10:46,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2021-02-23 18:10:46,879 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 55 [2021-02-23 18:10:46,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:46,880 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2021-02-23 18:10:46,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 18:10:46,880 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2021-02-23 18:10:46,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-23 18:10:46,883 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:46,883 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] [2021-02-23 18:10:46,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 18:10:46,883 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:46,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:46,884 INFO L82 PathProgramCache]: Analyzing trace with hash -513492670, now seen corresponding path program 2 times [2021-02-23 18:10:46,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:46,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847150357] [2021-02-23 18:10:46,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:46,895 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:46,898 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:46,927 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,928 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:46,929 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,929 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:46,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,933 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:46,938 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:46,943 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:46,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,952 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:46,960 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:46,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:46,967 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:46,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:47,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:47,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:47,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-02-23 18:10:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:47,037 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:47,039 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:47,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-23 18:10:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:47,048 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:47,048 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:47,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847150357] [2021-02-23 18:10:47,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:47,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 18:10:47,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604331888] [2021-02-23 18:10:47,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 18:10:47,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:47,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 18:10:47,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-23 18:10:47,059 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 10 states. [2021-02-23 18:10:47,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:47,852 INFO L93 Difference]: Finished difference Result 227 states and 251 transitions. [2021-02-23 18:10:47,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-23 18:10:47,853 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2021-02-23 18:10:47,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:47,856 INFO L225 Difference]: With dead ends: 227 [2021-02-23 18:10:47,857 INFO L226 Difference]: Without dead ends: 157 [2021-02-23 18:10:47,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-02-23 18:10:47,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-02-23 18:10:47,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2021-02-23 18:10:47,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2021-02-23 18:10:47,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 122 transitions. [2021-02-23 18:10:47,908 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 122 transitions. Word has length 57 [2021-02-23 18:10:47,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:47,908 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 122 transitions. [2021-02-23 18:10:47,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 18:10:47,908 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 122 transitions. [2021-02-23 18:10:47,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-23 18:10:47,916 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:47,916 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] [2021-02-23 18:10:47,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 18:10:47,917 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:47,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:47,917 INFO L82 PathProgramCache]: Analyzing trace with hash -2081168667, now seen corresponding path program 2 times [2021-02-23 18:10:47,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:47,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816434031] [2021-02-23 18:10:47,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:47,936 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:47,941 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:47,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:47,995 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:47,996 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:47,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:47,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:48,001 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:48,002 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:48,006 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:48,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:48,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:48,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:48,020 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:48,023 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:48,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:48,031 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:48,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:48,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:48,069 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:48,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-02-23 18:10:48,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:48,107 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:48,107 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:48,117 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:48,117 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:48,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-02-23 18:10:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:48,138 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:48,141 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:48,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:48,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816434031] [2021-02-23 18:10:48,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:48,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-23 18:10:48,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926996851] [2021-02-23 18:10:48,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 18:10:48,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:48,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 18:10:48,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-02-23 18:10:48,154 INFO L87 Difference]: Start difference. First operand 110 states and 122 transitions. Second operand 11 states. [2021-02-23 18:10:48,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:48,954 INFO L93 Difference]: Finished difference Result 147 states and 158 transitions. [2021-02-23 18:10:48,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-23 18:10:48,955 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2021-02-23 18:10:48,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:48,956 INFO L225 Difference]: With dead ends: 147 [2021-02-23 18:10:48,956 INFO L226 Difference]: Without dead ends: 117 [2021-02-23 18:10:48,957 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 [2021-02-23 18:10:48,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-02-23 18:10:48,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2021-02-23 18:10:48,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-02-23 18:10:48,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2021-02-23 18:10:48,980 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 59 [2021-02-23 18:10:48,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:48,980 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2021-02-23 18:10:48,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 18:10:48,981 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2021-02-23 18:10:48,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-02-23 18:10:48,981 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:48,982 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] [2021-02-23 18:10:48,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 18:10:48,982 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:48,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:48,983 INFO L82 PathProgramCache]: Analyzing trace with hash 438940879, now seen corresponding path program 2 times [2021-02-23 18:10:48,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:48,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80007872] [2021-02-23 18:10:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:48,998 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:49,000 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:49,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:49,029 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:49,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:49,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:49,031 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 18:10:49,035 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:49,036 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 18:10:49,043 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:49,043 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:49,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:49,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:49,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:49,089 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:49,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-02-23 18:10:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:49,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:49,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:49,161 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:49,161 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:49,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:49,172 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:49,181 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:49,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:10:49,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:49,202 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:10:49,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:49,215 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 18:10:49,227 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:49,232 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 18:10:49,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:49,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 18:10:49,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-23 18:10:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:49,272 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:49,273 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:49,291 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:49,291 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:49,308 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:49,308 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:49,326 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:49,326 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:49,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80007872] [2021-02-23 18:10:49,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:49,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-23 18:10:49,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305629324] [2021-02-23 18:10:49,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-23 18:10:49,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:49,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-23 18:10:49,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-02-23 18:10:49,355 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand 17 states. [2021-02-23 18:10:50,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:50,403 INFO L93 Difference]: Finished difference Result 131 states and 139 transitions. [2021-02-23 18:10:50,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-23 18:10:50,403 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2021-02-23 18:10:50,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:50,405 INFO L225 Difference]: With dead ends: 131 [2021-02-23 18:10:50,405 INFO L226 Difference]: Without dead ends: 126 [2021-02-23 18:10:50,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2021-02-23 18:10:50,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-02-23 18:10:50,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 111. [2021-02-23 18:10:50,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-02-23 18:10:50,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 120 transitions. [2021-02-23 18:10:50,433 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 120 transitions. Word has length 64 [2021-02-23 18:10:50,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:50,433 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 120 transitions. [2021-02-23 18:10:50,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-23 18:10:50,434 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 120 transitions. [2021-02-23 18:10:50,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-23 18:10:50,435 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:50,435 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] [2021-02-23 18:10:50,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 18:10:50,435 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:50,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:50,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1876118818, now seen corresponding path program 1 times [2021-02-23 18:10:50,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:50,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902153664] [2021-02-23 18:10:50,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:50,443 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:50,447 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:50,474 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,475 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:50,488 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,488 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:50,492 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,492 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:50,496 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,497 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:50,503 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:50,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:50,527 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,528 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:50,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-23 18:10:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:50,556 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,556 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:50,565 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,565 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:50,576 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,577 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:50,589 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,590 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:50,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-02-23 18:10:50,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:50,605 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:50,606 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:50,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902153664] [2021-02-23 18:10:50,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:50,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-23 18:10:50,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173269991] [2021-02-23 18:10:50,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 18:10:50,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:50,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 18:10:50,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-02-23 18:10:50,613 INFO L87 Difference]: Start difference. First operand 111 states and 120 transitions. Second operand 11 states. [2021-02-23 18:10:51,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:51,219 INFO L93 Difference]: Finished difference Result 168 states and 180 transitions. [2021-02-23 18:10:51,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-23 18:10:51,219 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2021-02-23 18:10:51,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:51,221 INFO L225 Difference]: With dead ends: 168 [2021-02-23 18:10:51,221 INFO L226 Difference]: Without dead ends: 137 [2021-02-23 18:10:51,222 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 [2021-02-23 18:10:51,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-02-23 18:10:51,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 111. [2021-02-23 18:10:51,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-02-23 18:10:51,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 120 transitions. [2021-02-23 18:10:51,247 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 120 transitions. Word has length 65 [2021-02-23 18:10:51,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:51,248 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 120 transitions. [2021-02-23 18:10:51,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 18:10:51,248 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 120 transitions. [2021-02-23 18:10:51,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-02-23 18:10:51,249 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:51,249 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] [2021-02-23 18:10:51,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 18:10:51,249 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:51,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:51,250 INFO L82 PathProgramCache]: Analyzing trace with hash -797078925, now seen corresponding path program 3 times [2021-02-23 18:10:51,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:51,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525495000] [2021-02-23 18:10:51,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:51,272 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:51,275 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:51,304 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:51,304 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:51,305 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:51,305 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:51,311 WARN L141 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-02-23 18:10:51,312 WARN L147 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size 1 [2021-02-23 18:10:51,312 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:51,313 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:51,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:51,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:51,335 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:51,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:51,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-02-23 18:10:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:51,394 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:51,395 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:51,401 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:51,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:51,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:51,411 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:51,420 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:51,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:51,433 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:51,433 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:51,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:51,448 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:51,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-23 18:10:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:51,484 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:51,485 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:51,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525495000] [2021-02-23 18:10:51,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:51,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-23 18:10:51,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347356497] [2021-02-23 18:10:51,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 18:10:51,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:51,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 18:10:51,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-23 18:10:51,493 INFO L87 Difference]: Start difference. First operand 111 states and 120 transitions. Second operand 11 states. [2021-02-23 18:10:51,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:51,942 INFO L93 Difference]: Finished difference Result 172 states and 185 transitions. [2021-02-23 18:10:51,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-23 18:10:51,942 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2021-02-23 18:10:51,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:51,944 INFO L225 Difference]: With dead ends: 172 [2021-02-23 18:10:51,944 INFO L226 Difference]: Without dead ends: 141 [2021-02-23 18:10:51,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-02-23 18:10:51,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-02-23 18:10:51,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 126. [2021-02-23 18:10:51,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2021-02-23 18:10:51,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 138 transitions. [2021-02-23 18:10:51,974 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 138 transitions. Word has length 71 [2021-02-23 18:10:51,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:51,975 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 138 transitions. [2021-02-23 18:10:51,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 18:10:51,975 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 138 transitions. [2021-02-23 18:10:51,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-02-23 18:10:51,976 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:51,976 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] [2021-02-23 18:10:51,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 18:10:51,976 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:51,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:51,977 INFO L82 PathProgramCache]: Analyzing trace with hash 958008151, now seen corresponding path program 2 times [2021-02-23 18:10:51,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:51,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035200603] [2021-02-23 18:10:51,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:51,986 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:51,989 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:52,017 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:52,018 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:52,020 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:52,022 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:52,026 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:52,027 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:52,032 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:52,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:52,041 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:52,042 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:52,049 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:52,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:52,057 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:52,057 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:52,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:52,085 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:52,086 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:52,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-02-23 18:10:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:52,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:52,114 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:52,124 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:52,125 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:52,136 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:52,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:52,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:52,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:52,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-02-23 18:10:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:52,169 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:52,169 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:52,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035200603] [2021-02-23 18:10:52,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:52,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-23 18:10:52,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146755414] [2021-02-23 18:10:52,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-23 18:10:52,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:52,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-23 18:10:52,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-23 18:10:52,178 INFO L87 Difference]: Start difference. First operand 126 states and 138 transitions. Second operand 13 states. [2021-02-23 18:10:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:52,998 INFO L93 Difference]: Finished difference Result 170 states and 181 transitions. [2021-02-23 18:10:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-23 18:10:52,999 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 75 [2021-02-23 18:10:52,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:53,000 INFO L225 Difference]: With dead ends: 170 [2021-02-23 18:10:53,000 INFO L226 Difference]: Without dead ends: 133 [2021-02-23 18:10:53,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-02-23 18:10:53,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-02-23 18:10:53,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 114. [2021-02-23 18:10:53,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2021-02-23 18:10:53,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2021-02-23 18:10:53,025 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 75 [2021-02-23 18:10:53,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:53,025 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2021-02-23 18:10:53,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-23 18:10:53,026 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2021-02-23 18:10:53,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-02-23 18:10:53,027 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:53,027 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] [2021-02-23 18:10:53,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-23 18:10:53,027 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:53,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:53,028 INFO L82 PathProgramCache]: Analyzing trace with hash 44033053, now seen corresponding path program 4 times [2021-02-23 18:10:53,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:53,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185226674] [2021-02-23 18:10:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:53,042 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:53,044 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:53,077 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:53,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:53,078 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:53,078 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:53,084 WARN L141 QuantifierPusher]: treesize reduction 8, result has 71.4 percent of original size [2021-02-23 18:10:53,089 WARN L147 QuantifierPusher]: treesize reduction 8, result has 71.4 percent of original size 20 [2021-02-23 18:10:53,107 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:53,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:53,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:53,132 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:53,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:53,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-02-23 18:10:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:53,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:53,179 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:53,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-02-23 18:10:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:53,192 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:53,193 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:53,194 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:53,195 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:53,205 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:53,206 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:53,217 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:53,218 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:53,230 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:53,231 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:53,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:53,245 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:53,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:53,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:10:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:53,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185226674] [2021-02-23 18:10:53,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:53,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-23 18:10:53,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457118924] [2021-02-23 18:10:53,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 18:10:53,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:53,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 18:10:53,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-02-23 18:10:53,312 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand 12 states. [2021-02-23 18:10:54,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:54,097 INFO L93 Difference]: Finished difference Result 139 states and 147 transitions. [2021-02-23 18:10:54,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-23 18:10:54,097 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 80 [2021-02-23 18:10:54,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:54,099 INFO L225 Difference]: With dead ends: 139 [2021-02-23 18:10:54,099 INFO L226 Difference]: Without dead ends: 134 [2021-02-23 18:10:54,099 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 [2021-02-23 18:10:54,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-02-23 18:10:54,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 127. [2021-02-23 18:10:54,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-02-23 18:10:54,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 136 transitions. [2021-02-23 18:10:54,127 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 136 transitions. Word has length 80 [2021-02-23 18:10:54,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:54,128 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 136 transitions. [2021-02-23 18:10:54,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 18:10:54,128 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 136 transitions. [2021-02-23 18:10:54,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-02-23 18:10:54,129 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:54,129 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] [2021-02-23 18:10:54,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-23 18:10:54,130 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:54,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:54,130 INFO L82 PathProgramCache]: Analyzing trace with hash 2027611180, now seen corresponding path program 3 times [2021-02-23 18:10:54,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:54,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337983389] [2021-02-23 18:10:54,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:54,136 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:54,139 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:54,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:54,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:54,168 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:54,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:54,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:54,172 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:54,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:54,176 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:54,182 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:54,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:54,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:10:54,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:54,208 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:54,208 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:54,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-23 18:10:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:54,240 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:54,241 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:54,250 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:54,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:54,260 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:54,261 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:54,273 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:54,273 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:54,286 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:54,286 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:10:54,299 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:54,300 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:10:54,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-02-23 18:10:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:10:54,318 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:10:54,319 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:10:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:10:54,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337983389] [2021-02-23 18:10:54,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:10:54,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-23 18:10:54,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015355801] [2021-02-23 18:10:54,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-23 18:10:54,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:10:54,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-23 18:10:54,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-02-23 18:10:54,329 INFO L87 Difference]: Start difference. First operand 127 states and 136 transitions. Second operand 13 states. [2021-02-23 18:10:55,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:10:55,083 INFO L93 Difference]: Finished difference Result 188 states and 200 transitions. [2021-02-23 18:10:55,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-23 18:10:55,084 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 81 [2021-02-23 18:10:55,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:10:55,086 INFO L225 Difference]: With dead ends: 188 [2021-02-23 18:10:55,086 INFO L226 Difference]: Without dead ends: 150 [2021-02-23 18:10:55,089 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 [2021-02-23 18:10:55,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-02-23 18:10:55,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 130. [2021-02-23 18:10:55,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2021-02-23 18:10:55,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 140 transitions. [2021-02-23 18:10:55,122 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 140 transitions. Word has length 81 [2021-02-23 18:10:55,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:10:55,122 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 140 transitions. [2021-02-23 18:10:55,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-23 18:10:55,122 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 140 transitions. [2021-02-23 18:10:55,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-02-23 18:10:55,123 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:10:55,124 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] [2021-02-23 18:10:55,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-23 18:10:55,124 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:10:55,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:10:55,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1793054875, now seen corresponding path program 5 times [2021-02-23 18:10:55,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:10:55,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54332759] [2021-02-23 18:10:55,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:10:55,144 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:10:55,151 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:10:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:10:55,191 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:10:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:10:55,232 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:10:55,290 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 18:10:55,290 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 18:10:55,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-23 18:10:55,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:10:55 BoogieIcfgContainer [2021-02-23 18:10:55,324 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 18:10:55,325 INFO L168 Benchmark]: Toolchain (without parser) took 16258.92 ms. Allocated memory was 153.1 MB in the beginning and 332.4 MB in the end (delta: 179.3 MB). Free memory was 129.1 MB in the beginning and 190.1 MB in the end (delta: -61.1 MB). Peak memory consumption was 119.7 MB. Max. memory is 8.0 GB. [2021-02-23 18:10:55,326 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 153.1 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:10:55,326 INFO L168 Benchmark]: CACSL2BoogieTranslator took 554.63 ms. Allocated memory is still 153.1 MB. Free memory was 128.0 MB in the beginning and 105.9 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-02-23 18:10:55,327 INFO L168 Benchmark]: Boogie Preprocessor took 191.42 ms. Allocated memory is still 153.1 MB. Free memory was 105.9 MB in the beginning and 134.2 MB in the end (delta: -28.3 MB). Peak memory consumption was 3.7 MB. Max. memory is 8.0 GB. [2021-02-23 18:10:55,327 INFO L168 Benchmark]: RCFGBuilder took 819.72 ms. Allocated memory is still 153.1 MB. Free memory was 134.2 MB in the beginning and 89.7 MB in the end (delta: 44.6 MB). Peak memory consumption was 44.0 MB. Max. memory is 8.0 GB. [2021-02-23 18:10:55,327 INFO L168 Benchmark]: TraceAbstraction took 14671.47 ms. Allocated memory was 153.1 MB in the beginning and 332.4 MB in the end (delta: 179.3 MB). Free memory was 89.1 MB in the beginning and 190.1 MB in the end (delta: -101.0 MB). Peak memory consumption was 79.3 MB. Max. memory is 8.0 GB. [2021-02-23 18:10:55,337 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 153.1 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 554.63 ms. Allocated memory is still 153.1 MB. Free memory was 128.0 MB in the beginning and 105.9 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 191.42 ms. Allocated memory is still 153.1 MB. Free memory was 105.9 MB in the beginning and 134.2 MB in the end (delta: -28.3 MB). Peak memory consumption was 3.7 MB. Max. memory is 8.0 GB. * RCFGBuilder took 819.72 ms. Allocated memory is still 153.1 MB. Free memory was 134.2 MB in the beginning and 89.7 MB in the end (delta: 44.6 MB). Peak memory consumption was 44.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 14671.47 ms. Allocated memory was 153.1 MB in the beginning and 332.4 MB in the end (delta: 179.3 MB). Free memory was 89.1 MB in the beginning and 190.1 MB in the end (delta: -101.0 MB). Peak memory consumption was 79.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 613]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [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] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 96 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.5s, OverallIterations: 16, TraceHistogramMax: 3, AutomataDifference: 10.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1003 SDtfs, 2217 SDslu, 2677 SDs, 0 SdLazy, 5274 SolverSat, 359 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 353 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 5.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred 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, 360 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...