/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 16:42:06,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:42:06,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:42:06,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:42:06,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:42:06,505 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:42:06,507 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:42:06,509 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:42:06,511 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:42:06,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:42:06,514 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:42:06,515 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:42:06,515 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:42:06,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:42:06,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:42:06,519 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:42:06,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:42:06,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:42:06,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:42:06,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:42:06,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:42:06,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:42:06,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:42:06,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:42:06,535 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 16:42:06,535 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 16:42:06,535 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 16:42:06,537 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 16:42:06,537 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 16:42:06,538 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 16:42:06,539 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 16:42:06,540 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 16:42:06,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 16:42:06,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 16:42:06,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 16:42:06,543 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 16:42:06,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 16:42:06,544 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 16:42:06,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:42:06,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:42:06,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:42:06,548 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 16:42:06,560 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:42:06,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:42:06,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:42:06,562 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:42:06,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:42:06,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:42:06,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:42:06,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:42:06,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:42:06,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:42:06,564 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:42:06,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:42:06,564 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:42:06,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:42:06,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:42:06,565 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:42:06,565 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:42:06,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:42:06,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:42:06,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:42:06,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:42:06,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:42:06,567 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:42:07,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:42:07,077 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:42:07,082 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:42:07,084 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:42:07,086 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:42:07,087 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-09-04 16:42:07,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4452d68cc/a20f803ce94843138f8d1920bb826e52/FLAG049cc3e5b [2020-09-04 16:42:07,915 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:42:07,916 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-09-04 16:42:07,939 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4452d68cc/a20f803ce94843138f8d1920bb826e52/FLAG049cc3e5b [2020-09-04 16:42:08,103 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4452d68cc/a20f803ce94843138f8d1920bb826e52 [2020-09-04 16:42:08,119 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:42:08,121 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:42:08,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:42:08,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:42:08,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:42:08,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:42:08" (1/1) ... [2020-09-04 16:42:08,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29040ee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:08, skipping insertion in model container [2020-09-04 16:42:08,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:42:08" (1/1) ... [2020-09-04 16:42:08,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:42:08,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:42:08,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:42:08,691 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:42:08,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:42:08,840 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:42:08,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:08 WrapperNode [2020-09-04 16:42:08,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:42:08,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:42:08,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:42:08,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:42:08,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:08" (1/1) ... [2020-09-04 16:42:08,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:08" (1/1) ... [2020-09-04 16:42:08,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:08" (1/1) ... [2020-09-04 16:42:08,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:08" (1/1) ... [2020-09-04 16:42:08,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:08" (1/1) ... [2020-09-04 16:42:08,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:08" (1/1) ... [2020-09-04 16:42:08,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:08" (1/1) ... [2020-09-04 16:42:08,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:42:08,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:42:08,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:42:08,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:42:08,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:42:09,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:42:09,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:42:09,014 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-04 16:42:09,014 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-04 16:42:09,014 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-04 16:42:09,015 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:42:09,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:42:09,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 16:42:09,015 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-04 16:42:09,015 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-04 16:42:09,016 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-04 16:42:09,016 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-04 16:42:09,016 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-04 16:42:09,016 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-04 16:42:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-04 16:42:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-04 16:42:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-04 16:42:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-04 16:42:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-04 16:42:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-04 16:42:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-04 16:42:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-04 16:42:09,021 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-04 16:42:09,021 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-04 16:42:09,021 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-04 16:42:09,021 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-04 16:42:09,021 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-04 16:42:09,022 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-04 16:42:09,022 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-04 16:42:09,022 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-04 16:42:09,022 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-04 16:42:09,022 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-04 16:42:09,025 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-04 16:42:09,025 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-04 16:42:09,025 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-04 16:42:09,025 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-04 16:42:09,026 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-04 16:42:09,026 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-04 16:42:09,026 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-04 16:42:09,026 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-04 16:42:09,026 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-04 16:42:09,026 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-04 16:42:09,027 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-04 16:42:09,027 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-04 16:42:09,027 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-04 16:42:09,027 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-04 16:42:09,027 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-04 16:42:09,027 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-04 16:42:09,027 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-04 16:42:09,028 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-04 16:42:09,028 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-04 16:42:09,028 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-04 16:42:09,028 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-04 16:42:09,028 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-04 16:42:09,028 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-04 16:42:09,029 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-04 16:42:09,029 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-04 16:42:09,029 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-04 16:42:09,029 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-04 16:42:09,029 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-04 16:42:09,029 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 16:42:09,030 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-04 16:42:09,030 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-04 16:42:09,030 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-04 16:42:09,030 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-04 16:42:09,030 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-04 16:42:09,030 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-04 16:42:09,030 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-04 16:42:09,031 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-04 16:42:09,031 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 16:42:09,031 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-04 16:42:09,031 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-04 16:42:09,031 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-04 16:42:09,031 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-04 16:42:09,032 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-04 16:42:09,032 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-04 16:42:09,032 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-04 16:42:09,032 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-04 16:42:09,032 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-04 16:42:09,032 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-04 16:42:09,033 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-04 16:42:09,033 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-04 16:42:09,033 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-04 16:42:09,033 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-04 16:42:09,033 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-04 16:42:09,033 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-04 16:42:09,034 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-04 16:42:09,034 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-04 16:42:09,034 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-04 16:42:09,034 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-04 16:42:09,034 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-04 16:42:09,034 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-04 16:42:09,035 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-04 16:42:09,035 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-04 16:42:09,035 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-04 16:42:09,035 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-04 16:42:09,035 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-04 16:42:09,035 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-04 16:42:09,036 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-04 16:42:09,036 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-04 16:42:09,036 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-04 16:42:09,036 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-04 16:42:09,036 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-04 16:42:09,036 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-04 16:42:09,036 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-04 16:42:09,037 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-04 16:42:09,037 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-04 16:42:09,037 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-04 16:42:09,037 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-04 16:42:09,037 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-04 16:42:09,037 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-04 16:42:09,037 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-04 16:42:09,038 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-04 16:42:09,038 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-04 16:42:09,038 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:42:09,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 16:42:09,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-04 16:42:09,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-04 16:42:09,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 16:42:09,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 16:42:09,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 16:42:09,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:42:09,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:42:09,424 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-04 16:42:09,843 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:42:09,843 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-04 16:42:09,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:42:09 BoogieIcfgContainer [2020-09-04 16:42:09,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:42:09,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:42:09,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:42:09,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:42:09,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:42:08" (1/3) ... [2020-09-04 16:42:09,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@377edcb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:42:09, skipping insertion in model container [2020-09-04 16:42:09,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:08" (2/3) ... [2020-09-04 16:42:09,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@377edcb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:42:09, skipping insertion in model container [2020-09-04 16:42:09,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:42:09" (3/3) ... [2020-09-04 16:42:09,861 INFO L109 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2020-09-04 16:42:09,873 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:42:09,885 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:42:09,909 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:42:09,939 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:42:09,940 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:42:09,940 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:42:09,940 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:42:09,940 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:42:09,941 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:42:09,941 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:42:09,941 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:42:09,965 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states. [2020-09-04 16:42:09,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 16:42:09,983 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:09,985 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] [2020-09-04 16:42:09,985 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:09,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:09,995 INFO L82 PathProgramCache]: Analyzing trace with hash -652445128, now seen corresponding path program 1 times [2020-09-04 16:42:10,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:10,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374214194] [2020-09-04 16:42:10,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:10,104 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:10,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:10,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:10,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374214194] [2020-09-04 16:42:10,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:10,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:42:10,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797270918] [2020-09-04 16:42:10,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:42:10,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:10,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:42:10,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:42:10,332 INFO L87 Difference]: Start difference. First operand 177 states. Second operand 3 states. [2020-09-04 16:42:10,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:10,780 INFO L93 Difference]: Finished difference Result 342 states and 400 transitions. [2020-09-04 16:42:10,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:42:10,782 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-04 16:42:10,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:10,797 INFO L225 Difference]: With dead ends: 342 [2020-09-04 16:42:10,797 INFO L226 Difference]: Without dead ends: 166 [2020-09-04 16:42:10,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:42:10,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-04 16:42:10,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2020-09-04 16:42:10,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-04 16:42:10,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 183 transitions. [2020-09-04 16:42:10,882 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 183 transitions. Word has length 31 [2020-09-04 16:42:10,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:10,882 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 183 transitions. [2020-09-04 16:42:10,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:42:10,883 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 183 transitions. [2020-09-04 16:42:10,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 16:42:10,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:10,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:10,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:42:10,891 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:10,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:10,891 INFO L82 PathProgramCache]: Analyzing trace with hash 473660712, now seen corresponding path program 1 times [2020-09-04 16:42:10,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:10,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027999713] [2020-09-04 16:42:10,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:10,900 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:10,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:11,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:11,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:11,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027999713] [2020-09-04 16:42:11,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:11,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 16:42:11,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086395169] [2020-09-04 16:42:11,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 16:42:11,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:11,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 16:42:11,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 16:42:11,028 INFO L87 Difference]: Start difference. First operand 166 states and 183 transitions. Second operand 5 states. [2020-09-04 16:42:11,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:11,411 INFO L93 Difference]: Finished difference Result 251 states and 277 transitions. [2020-09-04 16:42:11,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 16:42:11,413 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-09-04 16:42:11,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:11,418 INFO L225 Difference]: With dead ends: 251 [2020-09-04 16:42:11,418 INFO L226 Difference]: Without dead ends: 201 [2020-09-04 16:42:11,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 16:42:11,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-04 16:42:11,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2020-09-04 16:42:11,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-09-04 16:42:11,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 222 transitions. [2020-09-04 16:42:11,479 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 222 transitions. Word has length 41 [2020-09-04 16:42:11,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:11,480 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 222 transitions. [2020-09-04 16:42:11,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 16:42:11,480 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 222 transitions. [2020-09-04 16:42:11,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-04 16:42:11,491 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:11,492 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] [2020-09-04 16:42:11,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:42:11,492 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:11,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:11,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1870874818, now seen corresponding path program 1 times [2020-09-04 16:42:11,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:11,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652114326] [2020-09-04 16:42:11,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:11,530 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:11,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:11,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:11,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:11,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652114326] [2020-09-04 16:42:11,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:11,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 16:42:11,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093253252] [2020-09-04 16:42:11,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 16:42:11,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:11,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 16:42:11,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 16:42:11,680 INFO L87 Difference]: Start difference. First operand 200 states and 222 transitions. Second operand 4 states. [2020-09-04 16:42:12,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:12,013 INFO L93 Difference]: Finished difference Result 321 states and 359 transitions. [2020-09-04 16:42:12,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 16:42:12,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-09-04 16:42:12,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:12,015 INFO L225 Difference]: With dead ends: 321 [2020-09-04 16:42:12,015 INFO L226 Difference]: Without dead ends: 202 [2020-09-04 16:42:12,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 16:42:12,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-04 16:42:12,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2020-09-04 16:42:12,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-09-04 16:42:12,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 224 transitions. [2020-09-04 16:42:12,046 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 224 transitions. Word has length 54 [2020-09-04 16:42:12,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:12,046 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 224 transitions. [2020-09-04 16:42:12,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 16:42:12,047 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 224 transitions. [2020-09-04 16:42:12,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-04 16:42:12,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:12,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:12,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 16:42:12,049 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:12,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:12,049 INFO L82 PathProgramCache]: Analyzing trace with hash 129316031, now seen corresponding path program 1 times [2020-09-04 16:42:12,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:12,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591018011] [2020-09-04 16:42:12,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:12,071 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:12,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:12,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591018011] [2020-09-04 16:42:12,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:12,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 16:42:12,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010401206] [2020-09-04 16:42:12,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 16:42:12,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:12,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 16:42:12,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 16:42:12,190 INFO L87 Difference]: Start difference. First operand 202 states and 224 transitions. Second operand 7 states. [2020-09-04 16:42:12,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:12,614 INFO L93 Difference]: Finished difference Result 279 states and 306 transitions. [2020-09-04 16:42:12,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 16:42:12,615 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-09-04 16:42:12,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:12,617 INFO L225 Difference]: With dead ends: 279 [2020-09-04 16:42:12,617 INFO L226 Difference]: Without dead ends: 273 [2020-09-04 16:42:12,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-04 16:42:12,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-09-04 16:42:12,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 215. [2020-09-04 16:42:12,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-09-04 16:42:12,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 240 transitions. [2020-09-04 16:42:12,644 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 240 transitions. Word has length 56 [2020-09-04 16:42:12,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:12,646 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 240 transitions. [2020-09-04 16:42:12,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 16:42:12,646 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 240 transitions. [2020-09-04 16:42:12,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-04 16:42:12,648 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:12,648 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:12,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 16:42:12,649 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:12,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:12,649 INFO L82 PathProgramCache]: Analyzing trace with hash 593034583, now seen corresponding path program 1 times [2020-09-04 16:42:12,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:12,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869299264] [2020-09-04 16:42:12,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:12,667 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:12,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:12,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:12,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:12,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869299264] [2020-09-04 16:42:12,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:12,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 16:42:12,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677116903] [2020-09-04 16:42:12,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 16:42:12,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:12,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 16:42:12,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 16:42:12,790 INFO L87 Difference]: Start difference. First operand 215 states and 240 transitions. Second operand 7 states. [2020-09-04 16:42:13,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:13,243 INFO L93 Difference]: Finished difference Result 282 states and 309 transitions. [2020-09-04 16:42:13,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 16:42:13,244 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-09-04 16:42:13,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:13,246 INFO L225 Difference]: With dead ends: 282 [2020-09-04 16:42:13,246 INFO L226 Difference]: Without dead ends: 267 [2020-09-04 16:42:13,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-04 16:42:13,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-09-04 16:42:13,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 212. [2020-09-04 16:42:13,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-09-04 16:42:13,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 236 transitions. [2020-09-04 16:42:13,265 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 236 transitions. Word has length 62 [2020-09-04 16:42:13,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:13,266 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 236 transitions. [2020-09-04 16:42:13,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 16:42:13,267 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 236 transitions. [2020-09-04 16:42:13,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-04 16:42:13,268 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:13,268 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:13,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 16:42:13,268 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:13,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:13,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1629716359, now seen corresponding path program 1 times [2020-09-04 16:42:13,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:13,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536397178] [2020-09-04 16:42:13,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:13,281 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:13,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:13,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:13,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536397178] [2020-09-04 16:42:13,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:13,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 16:42:13,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480914813] [2020-09-04 16:42:13,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 16:42:13,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:13,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 16:42:13,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 16:42:13,376 INFO L87 Difference]: Start difference. First operand 212 states and 236 transitions. Second operand 7 states. [2020-09-04 16:42:13,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:13,799 INFO L93 Difference]: Finished difference Result 264 states and 290 transitions. [2020-09-04 16:42:13,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 16:42:13,800 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-09-04 16:42:13,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:13,802 INFO L225 Difference]: With dead ends: 264 [2020-09-04 16:42:13,802 INFO L226 Difference]: Without dead ends: 240 [2020-09-04 16:42:13,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-04 16:42:13,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-09-04 16:42:13,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 207. [2020-09-04 16:42:13,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-09-04 16:42:13,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 230 transitions. [2020-09-04 16:42:13,817 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 230 transitions. Word has length 62 [2020-09-04 16:42:13,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:13,817 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 230 transitions. [2020-09-04 16:42:13,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 16:42:13,817 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 230 transitions. [2020-09-04 16:42:13,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-04 16:42:13,819 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:13,819 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:13,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 16:42:13,819 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:13,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:13,820 INFO L82 PathProgramCache]: Analyzing trace with hash 852438762, now seen corresponding path program 1 times [2020-09-04 16:42:13,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:13,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15448970] [2020-09-04 16:42:13,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:13,829 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:14,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:14,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15448970] [2020-09-04 16:42:14,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:14,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-04 16:42:14,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605721442] [2020-09-04 16:42:14,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 16:42:14,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:14,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 16:42:14,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-04 16:42:14,139 INFO L87 Difference]: Start difference. First operand 207 states and 230 transitions. Second operand 15 states. [2020-09-04 16:42:15,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:15,270 INFO L93 Difference]: Finished difference Result 302 states and 330 transitions. [2020-09-04 16:42:15,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 16:42:15,271 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-09-04 16:42:15,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:15,274 INFO L225 Difference]: With dead ends: 302 [2020-09-04 16:42:15,274 INFO L226 Difference]: Without dead ends: 289 [2020-09-04 16:42:15,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2020-09-04 16:42:15,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-09-04 16:42:15,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 223. [2020-09-04 16:42:15,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-09-04 16:42:15,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 247 transitions. [2020-09-04 16:42:15,295 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 247 transitions. Word has length 67 [2020-09-04 16:42:15,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:15,295 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 247 transitions. [2020-09-04 16:42:15,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 16:42:15,296 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 247 transitions. [2020-09-04 16:42:15,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-04 16:42:15,297 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:15,297 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:15,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 16:42:15,298 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:15,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:15,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1742912072, now seen corresponding path program 1 times [2020-09-04 16:42:15,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:15,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684909596] [2020-09-04 16:42:15,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:15,317 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:15,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:15,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:15,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684909596] [2020-09-04 16:42:15,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:15,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-04 16:42:15,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338754482] [2020-09-04 16:42:15,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 16:42:15,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:15,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 16:42:15,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-04 16:42:15,648 INFO L87 Difference]: Start difference. First operand 223 states and 247 transitions. Second operand 15 states. [2020-09-04 16:42:16,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:16,782 INFO L93 Difference]: Finished difference Result 326 states and 357 transitions. [2020-09-04 16:42:16,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 16:42:16,783 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-09-04 16:42:16,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:16,785 INFO L225 Difference]: With dead ends: 326 [2020-09-04 16:42:16,786 INFO L226 Difference]: Without dead ends: 320 [2020-09-04 16:42:16,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2020-09-04 16:42:16,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-09-04 16:42:16,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 245. [2020-09-04 16:42:16,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-09-04 16:42:16,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 272 transitions. [2020-09-04 16:42:16,809 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 272 transitions. Word has length 67 [2020-09-04 16:42:16,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:16,810 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 272 transitions. [2020-09-04 16:42:16,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 16:42:16,810 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 272 transitions. [2020-09-04 16:42:16,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-04 16:42:16,811 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:16,811 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:16,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 16:42:16,812 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:16,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:16,812 INFO L82 PathProgramCache]: Analyzing trace with hash -838472334, now seen corresponding path program 1 times [2020-09-04 16:42:16,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:16,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440699008] [2020-09-04 16:42:16,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:16,822 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:16,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:17,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:17,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440699008] [2020-09-04 16:42:17,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:17,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-09-04 16:42:17,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559573253] [2020-09-04 16:42:17,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 16:42:17,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:17,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 16:42:17,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-09-04 16:42:17,258 INFO L87 Difference]: Start difference. First operand 245 states and 272 transitions. Second operand 17 states. [2020-09-04 16:42:18,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:18,962 INFO L93 Difference]: Finished difference Result 310 states and 340 transitions. [2020-09-04 16:42:18,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 16:42:18,962 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-09-04 16:42:18,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:18,964 INFO L225 Difference]: With dead ends: 310 [2020-09-04 16:42:18,965 INFO L226 Difference]: Without dead ends: 304 [2020-09-04 16:42:18,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 16:42:18,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-04 16:42:18,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 249. [2020-09-04 16:42:18,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-09-04 16:42:18,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 276 transitions. [2020-09-04 16:42:18,990 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 276 transitions. Word has length 73 [2020-09-04 16:42:18,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:18,991 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 276 transitions. [2020-09-04 16:42:18,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 16:42:18,991 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 276 transitions. [2020-09-04 16:42:18,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-04 16:42:18,992 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:18,992 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:18,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 16:42:18,993 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:18,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:18,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1654345840, now seen corresponding path program 1 times [2020-09-04 16:42:18,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:18,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80676522] [2020-09-04 16:42:18,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:19,003 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:19,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:19,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80676522] [2020-09-04 16:42:19,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:19,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-09-04 16:42:19,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069763745] [2020-09-04 16:42:19,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 16:42:19,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:19,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 16:42:19,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-09-04 16:42:19,449 INFO L87 Difference]: Start difference. First operand 249 states and 276 transitions. Second operand 17 states. [2020-09-04 16:42:21,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:21,224 INFO L93 Difference]: Finished difference Result 324 states and 354 transitions. [2020-09-04 16:42:21,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 16:42:21,225 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-09-04 16:42:21,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:21,228 INFO L225 Difference]: With dead ends: 324 [2020-09-04 16:42:21,228 INFO L226 Difference]: Without dead ends: 318 [2020-09-04 16:42:21,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 16:42:21,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-09-04 16:42:21,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 258. [2020-09-04 16:42:21,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-09-04 16:42:21,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 286 transitions. [2020-09-04 16:42:21,254 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 286 transitions. Word has length 73 [2020-09-04 16:42:21,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:21,255 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 286 transitions. [2020-09-04 16:42:21,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 16:42:21,255 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 286 transitions. [2020-09-04 16:42:21,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-04 16:42:21,256 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:21,256 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:21,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 16:42:21,257 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:21,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:21,257 INFO L82 PathProgramCache]: Analyzing trace with hash -617664064, now seen corresponding path program 1 times [2020-09-04 16:42:21,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:21,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135020201] [2020-09-04 16:42:21,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:21,270 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:21,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:21,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135020201] [2020-09-04 16:42:21,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:21,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-04 16:42:21,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777293216] [2020-09-04 16:42:21,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 16:42:21,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:21,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 16:42:21,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-04 16:42:21,508 INFO L87 Difference]: Start difference. First operand 258 states and 286 transitions. Second operand 15 states. [2020-09-04 16:42:22,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:22,552 INFO L93 Difference]: Finished difference Result 341 states and 373 transitions. [2020-09-04 16:42:22,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 16:42:22,552 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-09-04 16:42:22,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:22,555 INFO L225 Difference]: With dead ends: 341 [2020-09-04 16:42:22,556 INFO L226 Difference]: Without dead ends: 322 [2020-09-04 16:42:22,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2020-09-04 16:42:22,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-09-04 16:42:22,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 258. [2020-09-04 16:42:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-09-04 16:42:22,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 285 transitions. [2020-09-04 16:42:22,581 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 285 transitions. Word has length 73 [2020-09-04 16:42:22,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:22,581 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 285 transitions. [2020-09-04 16:42:22,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 16:42:22,582 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 285 transitions. [2020-09-04 16:42:22,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-04 16:42:22,583 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:22,583 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:22,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 16:42:22,583 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:22,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:22,584 INFO L82 PathProgramCache]: Analyzing trace with hash 342604767, now seen corresponding path program 2 times [2020-09-04 16:42:22,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:22,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002595493] [2020-09-04 16:42:22,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:22,598 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:23,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:23,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002595493] [2020-09-04 16:42:23,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:23,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-09-04 16:42:23,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869058019] [2020-09-04 16:42:23,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 16:42:23,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:23,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 16:42:23,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-09-04 16:42:23,069 INFO L87 Difference]: Start difference. First operand 258 states and 285 transitions. Second operand 22 states. [2020-09-04 16:42:25,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:25,349 INFO L93 Difference]: Finished difference Result 346 states and 378 transitions. [2020-09-04 16:42:25,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 16:42:25,350 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 78 [2020-09-04 16:42:25,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:25,352 INFO L225 Difference]: With dead ends: 346 [2020-09-04 16:42:25,352 INFO L226 Difference]: Without dead ends: 340 [2020-09-04 16:42:25,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=493, Invalid=2263, Unknown=0, NotChecked=0, Total=2756 [2020-09-04 16:42:25,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-09-04 16:42:25,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 283. [2020-09-04 16:42:25,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-09-04 16:42:25,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 312 transitions. [2020-09-04 16:42:25,384 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 312 transitions. Word has length 78 [2020-09-04 16:42:25,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:25,385 INFO L479 AbstractCegarLoop]: Abstraction has 283 states and 312 transitions. [2020-09-04 16:42:25,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 16:42:25,385 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 312 transitions. [2020-09-04 16:42:25,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-04 16:42:25,386 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:25,386 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:25,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 16:42:25,387 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:25,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:25,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1736898641, now seen corresponding path program 1 times [2020-09-04 16:42:25,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:25,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805167203] [2020-09-04 16:42:25,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:25,399 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:25,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:25,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805167203] [2020-09-04 16:42:25,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:25,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-09-04 16:42:25,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683016693] [2020-09-04 16:42:25,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 16:42:25,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:25,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 16:42:25,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-09-04 16:42:25,979 INFO L87 Difference]: Start difference. First operand 283 states and 312 transitions. Second operand 22 states. [2020-09-04 16:42:28,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:28,270 INFO L93 Difference]: Finished difference Result 383 states and 419 transitions. [2020-09-04 16:42:28,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-04 16:42:28,271 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 78 [2020-09-04 16:42:28,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:28,273 INFO L225 Difference]: With dead ends: 383 [2020-09-04 16:42:28,273 INFO L226 Difference]: Without dead ends: 377 [2020-09-04 16:42:28,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=459, Invalid=2193, Unknown=0, NotChecked=0, Total=2652 [2020-09-04 16:42:28,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-09-04 16:42:28,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 295. [2020-09-04 16:42:28,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-09-04 16:42:28,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 325 transitions. [2020-09-04 16:42:28,332 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 325 transitions. Word has length 78 [2020-09-04 16:42:28,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:28,332 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 325 transitions. [2020-09-04 16:42:28,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 16:42:28,333 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 325 transitions. [2020-09-04 16:42:28,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-04 16:42:28,334 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:28,334 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:28,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 16:42:28,334 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:28,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:28,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1698374602, now seen corresponding path program 1 times [2020-09-04 16:42:28,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:28,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901201091] [2020-09-04 16:42:28,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:28,343 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:28,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:28,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901201091] [2020-09-04 16:42:28,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:28,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-09-04 16:42:28,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450338315] [2020-09-04 16:42:28,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 16:42:28,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:28,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 16:42:28,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-09-04 16:42:28,863 INFO L87 Difference]: Start difference. First operand 295 states and 325 transitions. Second operand 17 states. [2020-09-04 16:42:30,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:30,506 INFO L93 Difference]: Finished difference Result 353 states and 386 transitions. [2020-09-04 16:42:30,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 16:42:30,507 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-09-04 16:42:30,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:30,509 INFO L225 Difference]: With dead ends: 353 [2020-09-04 16:42:30,509 INFO L226 Difference]: Without dead ends: 338 [2020-09-04 16:42:30,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 16:42:30,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-09-04 16:42:30,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 297. [2020-09-04 16:42:30,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-09-04 16:42:30,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 327 transitions. [2020-09-04 16:42:30,539 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 327 transitions. Word has length 79 [2020-09-04 16:42:30,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:30,539 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 327 transitions. [2020-09-04 16:42:30,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 16:42:30,539 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 327 transitions. [2020-09-04 16:42:30,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-04 16:42:30,541 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:30,541 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:30,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 16:42:30,541 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:30,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:30,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1559910918, now seen corresponding path program 2 times [2020-09-04 16:42:30,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:30,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999173497] [2020-09-04 16:42:30,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:30,556 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:31,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:31,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999173497] [2020-09-04 16:42:31,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:31,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-09-04 16:42:31,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878266104] [2020-09-04 16:42:31,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 16:42:31,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:31,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 16:42:31,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-09-04 16:42:31,050 INFO L87 Difference]: Start difference. First operand 297 states and 327 transitions. Second operand 17 states. [2020-09-04 16:42:32,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:32,741 INFO L93 Difference]: Finished difference Result 335 states and 367 transitions. [2020-09-04 16:42:32,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 16:42:32,741 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-09-04 16:42:32,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:32,743 INFO L225 Difference]: With dead ends: 335 [2020-09-04 16:42:32,743 INFO L226 Difference]: Without dead ends: 305 [2020-09-04 16:42:32,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 16:42:32,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-09-04 16:42:32,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 286. [2020-09-04 16:42:32,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-09-04 16:42:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 315 transitions. [2020-09-04 16:42:32,773 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 315 transitions. Word has length 79 [2020-09-04 16:42:32,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:32,774 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 315 transitions. [2020-09-04 16:42:32,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 16:42:32,774 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 315 transitions. [2020-09-04 16:42:32,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-04 16:42:32,775 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:32,775 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:32,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 16:42:32,776 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:32,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:32,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1643861864, now seen corresponding path program 2 times [2020-09-04 16:42:32,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:32,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633955406] [2020-09-04 16:42:32,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:32,785 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:32,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:33,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:33,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:33,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633955406] [2020-09-04 16:42:33,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:33,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-09-04 16:42:33,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111969573] [2020-09-04 16:42:33,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 16:42:33,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:33,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 16:42:33,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-09-04 16:42:33,199 INFO L87 Difference]: Start difference. First operand 286 states and 315 transitions. Second operand 17 states. [2020-09-04 16:42:34,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:34,814 INFO L93 Difference]: Finished difference Result 325 states and 355 transitions. [2020-09-04 16:42:34,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 16:42:34,815 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-09-04 16:42:34,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:34,817 INFO L225 Difference]: With dead ends: 325 [2020-09-04 16:42:34,818 INFO L226 Difference]: Without dead ends: 299 [2020-09-04 16:42:34,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 16:42:34,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-09-04 16:42:34,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 274. [2020-09-04 16:42:34,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-09-04 16:42:34,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 302 transitions. [2020-09-04 16:42:34,842 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 302 transitions. Word has length 79 [2020-09-04 16:42:34,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:34,843 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 302 transitions. [2020-09-04 16:42:34,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 16:42:34,843 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 302 transitions. [2020-09-04 16:42:34,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-04 16:42:34,844 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:34,844 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:34,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 16:42:34,845 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:34,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:34,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1435872375, now seen corresponding path program 1 times [2020-09-04 16:42:34,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:34,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154568283] [2020-09-04 16:42:34,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:34,855 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:35,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:35,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:35,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154568283] [2020-09-04 16:42:35,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:35,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-09-04 16:42:35,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833584236] [2020-09-04 16:42:35,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 16:42:35,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:35,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 16:42:35,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-09-04 16:42:35,409 INFO L87 Difference]: Start difference. First operand 274 states and 302 transitions. Second operand 22 states. [2020-09-04 16:42:37,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:37,780 INFO L93 Difference]: Finished difference Result 352 states and 384 transitions. [2020-09-04 16:42:37,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-04 16:42:37,786 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 84 [2020-09-04 16:42:37,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:37,788 INFO L225 Difference]: With dead ends: 352 [2020-09-04 16:42:37,788 INFO L226 Difference]: Without dead ends: 337 [2020-09-04 16:42:37,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2020-09-04 16:42:37,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-09-04 16:42:37,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 290. [2020-09-04 16:42:37,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-09-04 16:42:37,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 319 transitions. [2020-09-04 16:42:37,818 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 319 transitions. Word has length 84 [2020-09-04 16:42:37,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:37,818 INFO L479 AbstractCegarLoop]: Abstraction has 290 states and 319 transitions. [2020-09-04 16:42:37,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 16:42:37,819 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 319 transitions. [2020-09-04 16:42:37,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-04 16:42:37,820 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:37,820 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:37,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 16:42:37,821 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:37,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:37,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1822413145, now seen corresponding path program 3 times [2020-09-04 16:42:37,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:37,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665365795] [2020-09-04 16:42:37,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:37,831 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:38,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:38,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665365795] [2020-09-04 16:42:38,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:38,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-09-04 16:42:38,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454632316] [2020-09-04 16:42:38,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-04 16:42:38,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:38,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-04 16:42:38,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-09-04 16:42:38,837 INFO L87 Difference]: Start difference. First operand 290 states and 319 transitions. Second operand 25 states. [2020-09-04 16:42:40,820 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-09-04 16:42:41,230 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-09-04 16:42:42,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:42,594 INFO L93 Difference]: Finished difference Result 353 states and 385 transitions. [2020-09-04 16:42:42,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-04 16:42:42,595 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 84 [2020-09-04 16:42:42,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:42,598 INFO L225 Difference]: With dead ends: 353 [2020-09-04 16:42:42,598 INFO L226 Difference]: Without dead ends: 340 [2020-09-04 16:42:42,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=521, Invalid=2785, Unknown=0, NotChecked=0, Total=3306 [2020-09-04 16:42:42,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-09-04 16:42:42,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 299. [2020-09-04 16:42:42,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-09-04 16:42:42,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 328 transitions. [2020-09-04 16:42:42,637 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 328 transitions. Word has length 84 [2020-09-04 16:42:42,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:42,637 INFO L479 AbstractCegarLoop]: Abstraction has 299 states and 328 transitions. [2020-09-04 16:42:42,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-04 16:42:42,638 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 328 transitions. [2020-09-04 16:42:42,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-04 16:42:42,640 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:42,640 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:42,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-04 16:42:42,640 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:42,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:42,641 INFO L82 PathProgramCache]: Analyzing trace with hash 752503657, now seen corresponding path program 1 times [2020-09-04 16:42:42,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:42,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624730706] [2020-09-04 16:42:42,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:42,650 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:42:42,677 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:42:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:42:42,705 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:42:42,784 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:42:42,784 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:42:42,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-04 16:42:42,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:42:42 BoogieIcfgContainer [2020-09-04 16:42:42,823 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:42:42,825 INFO L168 Benchmark]: Toolchain (without parser) took 34704.45 ms. Allocated memory was 136.3 MB in the beginning and 515.4 MB in the end (delta: 379.1 MB). Free memory was 99.4 MB in the beginning and 345.6 MB in the end (delta: -246.3 MB). Peak memory consumption was 132.8 MB. Max. memory is 7.1 GB. [2020-09-04 16:42:42,831 INFO L168 Benchmark]: CDTParser took 0.91 ms. Allocated memory is still 136.3 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 16:42:42,832 INFO L168 Benchmark]: CACSL2BoogieTranslator took 718.24 ms. Allocated memory was 136.3 MB in the beginning and 201.3 MB in the end (delta: 65.0 MB). Free memory was 99.1 MB in the beginning and 167.5 MB in the end (delta: -68.4 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. [2020-09-04 16:42:42,835 INFO L168 Benchmark]: Boogie Preprocessor took 90.42 ms. Allocated memory is still 201.3 MB. Free memory was 167.5 MB in the beginning and 163.7 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 7.1 GB. [2020-09-04 16:42:42,837 INFO L168 Benchmark]: RCFGBuilder took 918.13 ms. Allocated memory is still 201.3 MB. Free memory was 163.7 MB in the beginning and 96.7 MB in the end (delta: 67.0 MB). Peak memory consumption was 67.0 MB. Max. memory is 7.1 GB. [2020-09-04 16:42:42,839 INFO L168 Benchmark]: TraceAbstraction took 32970.81 ms. Allocated memory was 201.3 MB in the beginning and 515.4 MB in the end (delta: 314.0 MB). Free memory was 96.1 MB in the beginning and 345.6 MB in the end (delta: -249.6 MB). Peak memory consumption was 64.5 MB. Max. memory is 7.1 GB. [2020-09-04 16:42:42,847 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.91 ms. Allocated memory is still 136.3 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 718.24 ms. Allocated memory was 136.3 MB in the beginning and 201.3 MB in the end (delta: 65.0 MB). Free memory was 99.1 MB in the beginning and 167.5 MB in the end (delta: -68.4 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 90.42 ms. Allocated memory is still 201.3 MB. Free memory was 167.5 MB in the beginning and 163.7 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 918.13 ms. Allocated memory is still 201.3 MB. Free memory was 163.7 MB in the beginning and 96.7 MB in the end (delta: 67.0 MB). Peak memory consumption was 67.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 32970.81 ms. Allocated memory was 201.3 MB in the beginning and 515.4 MB in the end (delta: 314.0 MB). Free memory was 96.1 MB in the beginning and 345.6 MB in the end (delta: -249.6 MB). Peak memory consumption was 64.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 609]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L541] struct TreeNode* root = malloc(sizeof(*root)), *n; [L542] root->left = ((void *)0) [L543] root->right = ((void *)0) [L544] COND FALSE !(__VERIFIER_nondet_int()) [L563] n = ((void *)0) [L564] struct TreeNode* pred; [L565] COND TRUE \read(*root) [L566] pred = ((void *)0) [L567] n = root [L568] EXPR n->left [L568] n->left || n->right [L568] EXPR n->right [L568] n->left || n->right [L568] COND FALSE !(n->left || n->right) [L575] COND FALSE !(\read(*pred)) [L581] root = ((void *)0) [L565] COND FALSE !(\read(*root)) [L584] List a = (List) malloc(sizeof(struct node)); [L585] COND FALSE !(a == 0) [L586] List t; [L587] List p = a; [L588] COND TRUE __VERIFIER_nondet_int() [L589] p->h = 1 [L590] t = (List) malloc(sizeof(struct node)) [L591] COND FALSE !(t == 0) [L592] p->n = t [L593] EXPR p->n [L593] p = p->n [L588] COND FALSE !(__VERIFIER_nondet_int()) [L595] COND TRUE __VERIFIER_nondet_int() [L596] p->h = 2 [L597] t = (List) malloc(sizeof(struct node)) [L598] COND FALSE !(t == 0) [L599] p->n = t [L600] EXPR p->n [L600] p = p->n [L595] COND FALSE !(__VERIFIER_nondet_int()) [L602] p->h = 3 [L603] p = a [L604] EXPR p->h [L604] COND FALSE !(p->h == 2) [L606] EXPR p->h [L606] COND TRUE p->h == 1 [L607] EXPR p->n [L607] p = p->n [L606] EXPR p->h [L606] COND FALSE !(p->h == 1) [L608] EXPR p->h [L608] COND TRUE p->h != 3 [L609] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 188 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 32.8s, OverallIterations: 19, TraceHistogramMax: 3, AutomataDifference: 25.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3258 SDtfs, 5759 SDslu, 24560 SDs, 0 SdLazy, 10836 SolverSat, 770 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 542 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 479 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2823 ImplicationChecksByTransitivity, 15.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=299occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 18 MinimizatonAttempts, 779 StatesRemovedByMinimization, 16 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...