/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-properties/list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 16:38:35,284 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:38:35,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:38:35,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:38:35,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:38:35,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:38:35,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:38:35,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:38:35,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:38:35,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:38:35,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:38:35,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:38:35,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:38:35,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:38:35,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:38:35,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:38:35,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:38:35,330 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:38:35,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:38:35,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:38:35,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:38:35,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:38:35,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:38:35,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:38:35,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 16:38:35,349 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 16:38:35,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 16:38:35,350 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 16:38:35,352 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 16:38:35,353 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 16:38:35,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 16:38:35,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 16:38:35,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 16:38:35,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 16:38:35,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 16:38:35,358 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 16:38:35,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 16:38:35,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 16:38:35,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:38:35,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:38:35,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:38:35,363 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 16:38:35,395 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:38:35,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:38:35,400 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:38:35,400 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:38:35,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:38:35,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:38:35,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:38:35,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:38:35,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:38:35,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:38:35,405 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:38:35,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:38:35,405 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:38:35,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:38:35,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:38:35,407 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:38:35,407 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:38:35,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:38:35,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:38:35,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:38:35,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:38:35,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:38:35,408 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:38:35,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:38:35,879 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:38:35,883 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:38:35,884 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:38:35,885 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:38:35,886 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-09-04 16:38:35,968 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2323aa62a/174276d1898f4ccf8fdcd6006a6a9843/FLAGa8e810b85 [2020-09-04 16:38:36,571 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:38:36,572 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list-2.i [2020-09-04 16:38:36,591 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2323aa62a/174276d1898f4ccf8fdcd6006a6a9843/FLAGa8e810b85 [2020-09-04 16:38:36,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2323aa62a/174276d1898f4ccf8fdcd6006a6a9843 [2020-09-04 16:38:36,851 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:38:36,854 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:38:36,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:38:36,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:38:36,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:38:36,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:38:36" (1/1) ... [2020-09-04 16:38:36,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@328f810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:38:36, skipping insertion in model container [2020-09-04 16:38:36,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:38:36" (1/1) ... [2020-09-04 16:38:36,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:38:36,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:38:37,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:38:37,562 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:38:37,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:38:37,718 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:38:37,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:38:37 WrapperNode [2020-09-04 16:38:37,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:38:37,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:38:37,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:38:37,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:38:37,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:38:37" (1/1) ... [2020-09-04 16:38:37,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:38:37" (1/1) ... [2020-09-04 16:38:37,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:38:37" (1/1) ... [2020-09-04 16:38:37,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:38:37" (1/1) ... [2020-09-04 16:38:37,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:38:37" (1/1) ... [2020-09-04 16:38:37,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:38:37" (1/1) ... [2020-09-04 16:38:37,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:38:37" (1/1) ... [2020-09-04 16:38:37,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:38:37,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:38:37,803 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:38:37,803 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:38:37,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:38:37" (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 16:38:37,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:38:37,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:38:37,896 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-04 16:38:37,897 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-04 16:38:37,897 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-09-04 16:38:37,897 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-09-04 16:38:37,897 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-09-04 16:38:37,897 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-04 16:38:37,898 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:38:37,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:38:37,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 16:38:37,898 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-04 16:38:37,899 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-04 16:38:37,899 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-04 16:38:37,899 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-04 16:38:37,899 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-04 16:38:37,899 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-04 16:38:37,900 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-04 16:38:37,900 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-04 16:38:37,900 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-04 16:38:37,901 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-04 16:38:37,901 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-04 16:38:37,901 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-04 16:38:37,901 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-04 16:38:37,901 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-04 16:38:37,902 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-04 16:38:37,902 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-04 16:38:37,902 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-04 16:38:37,902 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-04 16:38:37,902 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-09-04 16:38:37,902 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-09-04 16:38:37,903 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-09-04 16:38:37,903 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-04 16:38:37,903 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-04 16:38:37,903 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-04 16:38:37,904 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-04 16:38:37,904 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-04 16:38:37,904 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-04 16:38:37,904 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-04 16:38:37,904 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-04 16:38:37,904 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-04 16:38:37,904 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-04 16:38:37,905 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-04 16:38:37,905 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-04 16:38:37,905 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-04 16:38:37,905 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-04 16:38:37,905 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-04 16:38:37,906 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-04 16:38:37,906 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-04 16:38:37,906 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-04 16:38:37,906 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-04 16:38:37,906 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-04 16:38:37,906 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-04 16:38:37,907 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-04 16:38:37,907 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-04 16:38:37,907 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-04 16:38:37,907 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-04 16:38:37,907 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-04 16:38:37,907 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-04 16:38:37,908 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-04 16:38:37,908 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-04 16:38:37,908 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-04 16:38:37,908 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-04 16:38:37,908 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-04 16:38:37,909 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-04 16:38:37,909 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-04 16:38:37,909 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 16:38:37,909 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-04 16:38:37,909 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-04 16:38:37,909 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-04 16:38:37,910 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-04 16:38:37,910 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-04 16:38:37,910 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-04 16:38:37,910 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-04 16:38:37,910 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 16:38:37,910 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-04 16:38:37,911 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-04 16:38:37,911 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-04 16:38:37,911 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-04 16:38:37,911 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-04 16:38:37,911 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-04 16:38:37,911 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-04 16:38:37,912 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-04 16:38:37,912 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-04 16:38:37,912 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-04 16:38:37,912 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-04 16:38:37,912 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-04 16:38:37,913 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-04 16:38:37,913 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-04 16:38:37,913 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-04 16:38:37,913 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-04 16:38:37,913 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-04 16:38:37,913 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-04 16:38:37,914 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-04 16:38:37,914 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-04 16:38:37,914 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-04 16:38:37,914 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-04 16:38:37,914 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-04 16:38:37,914 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-04 16:38:37,915 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-04 16:38:37,915 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-04 16:38:37,915 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-04 16:38:37,915 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-04 16:38:37,915 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-04 16:38:37,915 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-04 16:38:37,916 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-04 16:38:37,916 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-04 16:38:37,916 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-04 16:38:37,916 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-04 16:38:37,916 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-04 16:38:37,916 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-04 16:38:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-04 16:38:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-04 16:38:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-04 16:38:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-04 16:38:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-04 16:38:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-04 16:38:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-04 16:38:37,918 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-04 16:38:37,918 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:38:37,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 16:38:37,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 16:38:37,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-04 16:38:37,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-04 16:38:37,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 16:38:37,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:38:37,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:38:37,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 16:38:38,352 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-04 16:38:38,624 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:38:38,624 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-04 16:38:38,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:38:38 BoogieIcfgContainer [2020-09-04 16:38:38,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:38:38,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:38:38,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:38:38,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:38:38,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:38:36" (1/3) ... [2020-09-04 16:38:38,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2ecf52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:38:38, skipping insertion in model container [2020-09-04 16:38:38,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:38:37" (2/3) ... [2020-09-04 16:38:38,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2ecf52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:38:38, skipping insertion in model container [2020-09-04 16:38:38,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:38:38" (3/3) ... [2020-09-04 16:38:38,643 INFO L109 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-09-04 16:38:38,658 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:38:38,672 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:38:38,712 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:38:38,802 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:38:38,802 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:38:38,802 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:38:38,802 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:38:38,802 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:38:38,809 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:38:38,809 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:38:38,809 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:38:38,835 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-09-04 16:38:38,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-04 16:38:38,851 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:38:38,853 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] [2020-09-04 16:38:38,853 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:38:38,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:38:38,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1227115345, now seen corresponding path program 1 times [2020-09-04 16:38:38,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:38:38,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792370894] [2020-09-04 16:38:38,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:38:38,981 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:38:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:39,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:38:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:39,175 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 16:38:39,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792370894] [2020-09-04 16:38:39,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:38:39,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:38:39,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503950170] [2020-09-04 16:38:39,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:38:39,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:38:39,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:38:39,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:38:39,210 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-09-04 16:38:39,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:38:39,528 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2020-09-04 16:38:39,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:38:39,531 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-04 16:38:39,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:38:39,546 INFO L225 Difference]: With dead ends: 110 [2020-09-04 16:38:39,546 INFO L226 Difference]: Without dead ends: 57 [2020-09-04 16:38:39,551 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 16:38:39,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-04 16:38:39,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-09-04 16:38:39,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 16:38:39,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-09-04 16:38:39,618 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 22 [2020-09-04 16:38:39,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:38:39,619 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-09-04 16:38:39,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:38:39,619 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-09-04 16:38:39,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-04 16:38:39,621 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:38:39,621 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] [2020-09-04 16:38:39,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:38:39,622 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:38:39,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:38:39,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1237633361, now seen corresponding path program 1 times [2020-09-04 16:38:39,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:38:39,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659847821] [2020-09-04 16:38:39,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:38:39,630 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:38:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:39,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:38:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:39,795 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 16:38:39,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659847821] [2020-09-04 16:38:39,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:38:39,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 16:38:39,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634330805] [2020-09-04 16:38:39,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 16:38:39,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:38:39,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 16:38:39,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 16:38:39,799 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 7 states. [2020-09-04 16:38:40,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:38:40,187 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2020-09-04 16:38:40,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 16:38:40,188 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-09-04 16:38:40,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:38:40,191 INFO L225 Difference]: With dead ends: 134 [2020-09-04 16:38:40,191 INFO L226 Difference]: Without dead ends: 128 [2020-09-04 16:38:40,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-04 16:38:40,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-04 16:38:40,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 70. [2020-09-04 16:38:40,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-04 16:38:40,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2020-09-04 16:38:40,211 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 30 [2020-09-04 16:38:40,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:38:40,211 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2020-09-04 16:38:40,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 16:38:40,212 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2020-09-04 16:38:40,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-04 16:38:40,213 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:38:40,214 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] [2020-09-04 16:38:40,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:38:40,214 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:38:40,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:38:40,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1213729417, now seen corresponding path program 1 times [2020-09-04 16:38:40,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:38:40,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970256902] [2020-09-04 16:38:40,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:38:40,249 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:38:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:40,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:38:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:40,370 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 16:38:40,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970256902] [2020-09-04 16:38:40,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:38:40,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 16:38:40,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325113422] [2020-09-04 16:38:40,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 16:38:40,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:38:40,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 16:38:40,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 16:38:40,373 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 7 states. [2020-09-04 16:38:40,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:38:40,706 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2020-09-04 16:38:40,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 16:38:40,707 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-04 16:38:40,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:38:40,709 INFO L225 Difference]: With dead ends: 137 [2020-09-04 16:38:40,709 INFO L226 Difference]: Without dead ends: 122 [2020-09-04 16:38:40,710 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 16:38:40,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-04 16:38:40,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 67. [2020-09-04 16:38:40,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-04 16:38:40,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2020-09-04 16:38:40,725 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 36 [2020-09-04 16:38:40,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:38:40,726 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2020-09-04 16:38:40,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 16:38:40,726 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2020-09-04 16:38:40,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-04 16:38:40,728 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:38:40,728 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] [2020-09-04 16:38:40,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 16:38:40,729 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:38:40,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:38:40,730 INFO L82 PathProgramCache]: Analyzing trace with hash -2044556103, now seen corresponding path program 1 times [2020-09-04 16:38:40,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:38:40,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142333830] [2020-09-04 16:38:40,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:38:40,740 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:38:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:40,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:38:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:40,920 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 16:38:40,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142333830] [2020-09-04 16:38:40,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:38:40,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 16:38:40,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108567751] [2020-09-04 16:38:40,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 16:38:40,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:38:40,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 16:38:40,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 16:38:40,925 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 7 states. [2020-09-04 16:38:41,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:38:41,261 INFO L93 Difference]: Finished difference Result 119 states and 126 transitions. [2020-09-04 16:38:41,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 16:38:41,262 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-04 16:38:41,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:38:41,263 INFO L225 Difference]: With dead ends: 119 [2020-09-04 16:38:41,263 INFO L226 Difference]: Without dead ends: 95 [2020-09-04 16:38:41,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-04 16:38:41,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-04 16:38:41,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 62. [2020-09-04 16:38:41,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-04 16:38:41,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-09-04 16:38:41,279 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 36 [2020-09-04 16:38:41,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:38:41,280 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-09-04 16:38:41,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 16:38:41,281 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-09-04 16:38:41,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 16:38:41,282 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:38:41,283 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] [2020-09-04 16:38:41,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 16:38:41,283 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:38:41,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:38:41,284 INFO L82 PathProgramCache]: Analyzing trace with hash -833752717, now seen corresponding path program 1 times [2020-09-04 16:38:41,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:38:41,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330015194] [2020-09-04 16:38:41,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:38:41,322 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:38:41,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:41,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:38:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:41,723 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 16:38:41,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330015194] [2020-09-04 16:38:41,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:38:41,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-04 16:38:41,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074340460] [2020-09-04 16:38:41,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 16:38:41,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:38:41,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 16:38:41,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-04 16:38:41,726 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 15 states. [2020-09-04 16:38:42,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:38:42,734 INFO L93 Difference]: Finished difference Result 157 states and 166 transitions. [2020-09-04 16:38:42,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 16:38:42,734 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-09-04 16:38:42,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:38:42,736 INFO L225 Difference]: With dead ends: 157 [2020-09-04 16:38:42,736 INFO L226 Difference]: Without dead ends: 144 [2020-09-04 16:38:42,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2020-09-04 16:38:42,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-04 16:38:42,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 78. [2020-09-04 16:38:42,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-04 16:38:42,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-09-04 16:38:42,761 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 41 [2020-09-04 16:38:42,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:38:42,761 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-09-04 16:38:42,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 16:38:42,761 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-09-04 16:38:42,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 16:38:42,763 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:38:42,764 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] [2020-09-04 16:38:42,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 16:38:42,764 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:38:42,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:38:42,765 INFO L82 PathProgramCache]: Analyzing trace with hash 865863745, now seen corresponding path program 1 times [2020-09-04 16:38:42,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:38:42,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762741623] [2020-09-04 16:38:42,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:38:42,777 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:38:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:43,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:38:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:43,086 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 16:38:43,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762741623] [2020-09-04 16:38:43,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:38:43,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-04 16:38:43,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620166585] [2020-09-04 16:38:43,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 16:38:43,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:38:43,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 16:38:43,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-04 16:38:43,089 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 15 states. [2020-09-04 16:38:44,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:38:44,136 INFO L93 Difference]: Finished difference Result 181 states and 193 transitions. [2020-09-04 16:38:44,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 16:38:44,137 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-09-04 16:38:44,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:38:44,139 INFO L225 Difference]: With dead ends: 181 [2020-09-04 16:38:44,140 INFO L226 Difference]: Without dead ends: 175 [2020-09-04 16:38:44,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2020-09-04 16:38:44,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-04 16:38:44,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 100. [2020-09-04 16:38:44,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-04 16:38:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2020-09-04 16:38:44,183 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 41 [2020-09-04 16:38:44,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:38:44,184 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2020-09-04 16:38:44,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 16:38:44,184 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2020-09-04 16:38:44,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-04 16:38:44,190 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:38:44,192 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] [2020-09-04 16:38:44,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 16:38:44,197 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:38:44,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:38:44,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1077832869, now seen corresponding path program 1 times [2020-09-04 16:38:44,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:38:44,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476325232] [2020-09-04 16:38:44,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:38:44,213 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:38:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:44,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:38:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:44,635 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 16:38:44,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476325232] [2020-09-04 16:38:44,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:38:44,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-04 16:38:44,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727931317] [2020-09-04 16:38:44,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 16:38:44,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:38:44,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 16:38:44,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-04 16:38:44,638 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand 16 states. [2020-09-04 16:38:45,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:38:45,911 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions. [2020-09-04 16:38:45,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 16:38:45,912 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-09-04 16:38:45,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:38:45,914 INFO L225 Difference]: With dead ends: 165 [2020-09-04 16:38:45,914 INFO L226 Difference]: Without dead ends: 159 [2020-09-04 16:38:45,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-04 16:38:45,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-04 16:38:45,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 104. [2020-09-04 16:38:45,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-04 16:38:45,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2020-09-04 16:38:45,938 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 47 [2020-09-04 16:38:45,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:38:45,939 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2020-09-04 16:38:45,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 16:38:45,939 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2020-09-04 16:38:45,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-04 16:38:45,940 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:38:45,940 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] [2020-09-04 16:38:45,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 16:38:45,941 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:38:45,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:38:45,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1893706375, now seen corresponding path program 1 times [2020-09-04 16:38:45,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:38:45,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717453819] [2020-09-04 16:38:45,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:38:45,948 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:38:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:46,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:38:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:46,374 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 16:38:46,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717453819] [2020-09-04 16:38:46,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:38:46,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-04 16:38:46,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410009939] [2020-09-04 16:38:46,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 16:38:46,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:38:46,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 16:38:46,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-04 16:38:46,380 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand 16 states. [2020-09-04 16:38:47,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:38:47,736 INFO L93 Difference]: Finished difference Result 179 states and 190 transitions. [2020-09-04 16:38:47,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 16:38:47,738 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-09-04 16:38:47,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:38:47,741 INFO L225 Difference]: With dead ends: 179 [2020-09-04 16:38:47,741 INFO L226 Difference]: Without dead ends: 173 [2020-09-04 16:38:47,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-04 16:38:47,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-04 16:38:47,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 113. [2020-09-04 16:38:47,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-04 16:38:47,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2020-09-04 16:38:47,784 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 47 [2020-09-04 16:38:47,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:38:47,785 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2020-09-04 16:38:47,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 16:38:47,785 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2020-09-04 16:38:47,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-04 16:38:47,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:38:47,787 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] [2020-09-04 16:38:47,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 16:38:47,787 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:38:47,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:38:47,788 INFO L82 PathProgramCache]: Analyzing trace with hash -857024599, now seen corresponding path program 1 times [2020-09-04 16:38:47,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:38:47,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143583539] [2020-09-04 16:38:47,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:38:47,807 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:38:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:48,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:38:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:48,187 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 16:38:48,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143583539] [2020-09-04 16:38:48,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:38:48,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-04 16:38:48,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4717158] [2020-09-04 16:38:48,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 16:38:48,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:38:48,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 16:38:48,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-04 16:38:48,196 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 15 states. [2020-09-04 16:38:49,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:38:49,081 INFO L93 Difference]: Finished difference Result 196 states and 209 transitions. [2020-09-04 16:38:49,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 16:38:49,081 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-09-04 16:38:49,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:38:49,083 INFO L225 Difference]: With dead ends: 196 [2020-09-04 16:38:49,083 INFO L226 Difference]: Without dead ends: 177 [2020-09-04 16:38:49,085 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 16:38:49,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-04 16:38:49,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 113. [2020-09-04 16:38:49,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-04 16:38:49,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2020-09-04 16:38:49,105 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 47 [2020-09-04 16:38:49,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:38:49,105 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2020-09-04 16:38:49,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 16:38:49,105 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2020-09-04 16:38:49,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-04 16:38:49,106 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:38:49,106 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] [2020-09-04 16:38:49,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 16:38:49,107 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:38:49,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:38:49,107 INFO L82 PathProgramCache]: Analyzing trace with hash 294895633, now seen corresponding path program 2 times [2020-09-04 16:38:49,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:38:49,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981040888] [2020-09-04 16:38:49,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:38:49,119 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:38:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:49,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:38:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:49,727 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 16:38:49,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981040888] [2020-09-04 16:38:49,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:38:49,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-09-04 16:38:49,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501091882] [2020-09-04 16:38:49,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 16:38:49,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:38:49,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 16:38:49,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-09-04 16:38:49,734 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand 22 states. [2020-09-04 16:38:52,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:38:52,064 INFO L93 Difference]: Finished difference Result 201 states and 214 transitions. [2020-09-04 16:38:52,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 16:38:52,064 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-09-04 16:38:52,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:38:52,066 INFO L225 Difference]: With dead ends: 201 [2020-09-04 16:38:52,067 INFO L226 Difference]: Without dead ends: 195 [2020-09-04 16:38:52,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=493, Invalid=2263, Unknown=0, NotChecked=0, Total=2756 [2020-09-04 16:38:52,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-04 16:38:52,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 138. [2020-09-04 16:38:52,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-04 16:38:52,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2020-09-04 16:38:52,092 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 52 [2020-09-04 16:38:52,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:38:52,093 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2020-09-04 16:38:52,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 16:38:52,093 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2020-09-04 16:38:52,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-04 16:38:52,094 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:38:52,094 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] [2020-09-04 16:38:52,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 16:38:52,095 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:38:52,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:38:52,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1689189507, now seen corresponding path program 1 times [2020-09-04 16:38:52,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:38:52,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471000658] [2020-09-04 16:38:52,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:38:52,111 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:38:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:52,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:38:52,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:52,653 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 16:38:52,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471000658] [2020-09-04 16:38:52,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:38:52,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-09-04 16:38:52,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121337273] [2020-09-04 16:38:52,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 16:38:52,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:38:52,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 16:38:52,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-09-04 16:38:52,657 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand 22 states. [2020-09-04 16:38:54,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:38:54,980 INFO L93 Difference]: Finished difference Result 238 states and 255 transitions. [2020-09-04 16:38:54,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-04 16:38:54,981 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-09-04 16:38:54,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:38:54,983 INFO L225 Difference]: With dead ends: 238 [2020-09-04 16:38:54,983 INFO L226 Difference]: Without dead ends: 232 [2020-09-04 16:38:54,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=459, Invalid=2193, Unknown=0, NotChecked=0, Total=2652 [2020-09-04 16:38:54,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-04 16:38:55,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 150. [2020-09-04 16:38:55,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-04 16:38:55,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 161 transitions. [2020-09-04 16:38:55,010 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 161 transitions. Word has length 52 [2020-09-04 16:38:55,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:38:55,011 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 161 transitions. [2020-09-04 16:38:55,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 16:38:55,011 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 161 transitions. [2020-09-04 16:38:55,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-04 16:38:55,012 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:38:55,012 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] [2020-09-04 16:38:55,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 16:38:55,012 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:38:55,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:38:55,013 INFO L82 PathProgramCache]: Analyzing trace with hash 219391251, now seen corresponding path program 1 times [2020-09-04 16:38:55,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:38:55,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755800521] [2020-09-04 16:38:55,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:38:55,019 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:38:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:55,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:38:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:55,389 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 16:38:55,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755800521] [2020-09-04 16:38:55,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:38:55,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-04 16:38:55,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542130524] [2020-09-04 16:38:55,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 16:38:55,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:38:55,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 16:38:55,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-04 16:38:55,392 INFO L87 Difference]: Start difference. First operand 150 states and 161 transitions. Second operand 16 states. [2020-09-04 16:38:56,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:38:56,706 INFO L93 Difference]: Finished difference Result 208 states and 222 transitions. [2020-09-04 16:38:56,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 16:38:56,707 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-09-04 16:38:56,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:38:56,709 INFO L225 Difference]: With dead ends: 208 [2020-09-04 16:38:56,709 INFO L226 Difference]: Without dead ends: 193 [2020-09-04 16:38:56,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-04 16:38:56,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-04 16:38:56,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 152. [2020-09-04 16:38:56,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-04 16:38:56,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 163 transitions. [2020-09-04 16:38:56,733 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 163 transitions. Word has length 53 [2020-09-04 16:38:56,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:38:56,734 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 163 transitions. [2020-09-04 16:38:56,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 16:38:56,734 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 163 transitions. [2020-09-04 16:38:56,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-04 16:38:56,735 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:38:56,735 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] [2020-09-04 16:38:56,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 16:38:56,735 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:38:56,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:38:56,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1256073027, now seen corresponding path program 2 times [2020-09-04 16:38:56,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:38:56,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390761109] [2020-09-04 16:38:56,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:38:56,741 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:38:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:57,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:38:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:57,060 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 16:38:57,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390761109] [2020-09-04 16:38:57,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:38:57,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-04 16:38:57,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125427312] [2020-09-04 16:38:57,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 16:38:57,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:38:57,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 16:38:57,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-04 16:38:57,063 INFO L87 Difference]: Start difference. First operand 152 states and 163 transitions. Second operand 16 states. [2020-09-04 16:38:58,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:38:58,144 INFO L93 Difference]: Finished difference Result 190 states and 203 transitions. [2020-09-04 16:38:58,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 16:38:58,145 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-09-04 16:38:58,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:38:58,147 INFO L225 Difference]: With dead ends: 190 [2020-09-04 16:38:58,147 INFO L226 Difference]: Without dead ends: 160 [2020-09-04 16:38:58,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2020-09-04 16:38:58,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-04 16:38:58,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 141. [2020-09-04 16:38:58,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-04 16:38:58,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 151 transitions. [2020-09-04 16:38:58,169 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 151 transitions. Word has length 53 [2020-09-04 16:38:58,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:38:58,169 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 151 transitions. [2020-09-04 16:38:58,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 16:38:58,169 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 151 transitions. [2020-09-04 16:38:58,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-04 16:38:58,170 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:38:58,170 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] [2020-09-04 16:38:58,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 16:38:58,171 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:38:58,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:38:58,171 INFO L82 PathProgramCache]: Analyzing trace with hash 164878513, now seen corresponding path program 2 times [2020-09-04 16:38:58,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:38:58,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620839009] [2020-09-04 16:38:58,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:38:58,181 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:38:58,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:58,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:38:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:58,539 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 16:38:58,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620839009] [2020-09-04 16:38:58,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:38:58,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-04 16:38:58,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35120071] [2020-09-04 16:38:58,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 16:38:58,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:38:58,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 16:38:58,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-04 16:38:58,541 INFO L87 Difference]: Start difference. First operand 141 states and 151 transitions. Second operand 16 states. [2020-09-04 16:38:59,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:38:59,810 INFO L93 Difference]: Finished difference Result 180 states and 191 transitions. [2020-09-04 16:38:59,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 16:38:59,811 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-09-04 16:38:59,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:38:59,812 INFO L225 Difference]: With dead ends: 180 [2020-09-04 16:38:59,812 INFO L226 Difference]: Without dead ends: 154 [2020-09-04 16:38:59,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2020-09-04 16:38:59,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-04 16:38:59,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 129. [2020-09-04 16:38:59,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-04 16:38:59,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2020-09-04 16:38:59,832 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 53 [2020-09-04 16:38:59,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:38:59,832 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2020-09-04 16:38:59,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 16:38:59,832 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2020-09-04 16:38:59,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-04 16:38:59,833 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:38:59,833 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] [2020-09-04 16:38:59,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 16:38:59,834 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:38:59,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:38:59,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1732440393, now seen corresponding path program 1 times [2020-09-04 16:38:59,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:38:59,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42084201] [2020-09-04 16:38:59,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:38:59,842 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:38:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:39:00,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:39:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:39:00,512 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 16:39:00,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42084201] [2020-09-04 16:39:00,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:39:00,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-09-04 16:39:00,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001150281] [2020-09-04 16:39:00,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 16:39:00,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:39:00,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 16:39:00,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-09-04 16:39:00,516 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand 22 states. [2020-09-04 16:39:02,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:39:02,759 INFO L93 Difference]: Finished difference Result 207 states and 220 transitions. [2020-09-04 16:39:02,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-04 16:39:02,760 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-09-04 16:39:02,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:39:02,762 INFO L225 Difference]: With dead ends: 207 [2020-09-04 16:39:02,762 INFO L226 Difference]: Without dead ends: 192 [2020-09-04 16:39:02,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2020-09-04 16:39:02,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-04 16:39:02,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 145. [2020-09-04 16:39:02,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-04 16:39:02,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2020-09-04 16:39:02,785 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 58 [2020-09-04 16:39:02,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:39:02,786 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2020-09-04 16:39:02,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 16:39:02,786 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2020-09-04 16:39:02,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-04 16:39:02,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:39:02,787 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] [2020-09-04 16:39:02,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 16:39:02,787 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:39:02,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:39:02,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1525845127, now seen corresponding path program 3 times [2020-09-04 16:39:02,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:39:02,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920421748] [2020-09-04 16:39:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:39:02,801 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:39:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:39:03,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:39:03,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:39:03,685 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 16:39:03,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920421748] [2020-09-04 16:39:03,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:39:03,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-09-04 16:39:03,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821320988] [2020-09-04 16:39:03,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-04 16:39:03,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:39:03,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-04 16:39:03,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-09-04 16:39:03,689 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand 24 states. [2020-09-04 16:39:05,207 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-09-04 16:39:06,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:39:06,596 INFO L93 Difference]: Finished difference Result 208 states and 221 transitions. [2020-09-04 16:39:06,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-04 16:39:06,597 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2020-09-04 16:39:06,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:39:06,598 INFO L225 Difference]: With dead ends: 208 [2020-09-04 16:39:06,599 INFO L226 Difference]: Without dead ends: 195 [2020-09-04 16:39:06,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=424, Invalid=2438, Unknown=0, NotChecked=0, Total=2862 [2020-09-04 16:39:06,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-04 16:39:06,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 154. [2020-09-04 16:39:06,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-04 16:39:06,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 164 transitions. [2020-09-04 16:39:06,631 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 164 transitions. Word has length 58 [2020-09-04 16:39:06,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:39:06,631 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 164 transitions. [2020-09-04 16:39:06,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-04 16:39:06,631 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 164 transitions. [2020-09-04 16:39:06,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-04 16:39:06,632 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:39:06,633 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] [2020-09-04 16:39:06,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 16:39:06,633 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:39:06,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:39:06,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1049071675, now seen corresponding path program 1 times [2020-09-04 16:39:06,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:39:06,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856147208] [2020-09-04 16:39:06,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:39:06,645 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:39:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:39:06,665 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:39:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:39:06,687 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:39:06,730 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:39:06,730 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:39:06,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 16:39:06,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:39:06 BoogieIcfgContainer [2020-09-04 16:39:06,759 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:39:06,762 INFO L168 Benchmark]: Toolchain (without parser) took 29908.66 ms. Allocated memory was 137.9 MB in the beginning and 430.4 MB in the end (delta: 292.6 MB). Free memory was 99.4 MB in the beginning and 148.8 MB in the end (delta: -49.4 MB). Peak memory consumption was 243.1 MB. Max. memory is 7.1 GB. [2020-09-04 16:39:06,762 INFO L168 Benchmark]: CDTParser took 0.67 ms. Allocated memory is still 137.9 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 16:39:06,763 INFO L168 Benchmark]: CACSL2BoogieTranslator took 863.38 ms. Allocated memory was 137.9 MB in the beginning and 203.4 MB in the end (delta: 65.5 MB). Free memory was 99.2 MB in the beginning and 168.7 MB in the end (delta: -69.6 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-09-04 16:39:06,764 INFO L168 Benchmark]: Boogie Preprocessor took 82.44 ms. Allocated memory is still 203.4 MB. Free memory was 168.7 MB in the beginning and 166.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-09-04 16:39:06,765 INFO L168 Benchmark]: RCFGBuilder took 827.60 ms. Allocated memory is still 203.4 MB. Free memory was 166.1 MB in the beginning and 118.0 MB in the end (delta: 48.0 MB). Peak memory consumption was 48.0 MB. Max. memory is 7.1 GB. [2020-09-04 16:39:06,766 INFO L168 Benchmark]: TraceAbstraction took 28127.34 ms. Allocated memory was 203.4 MB in the beginning and 430.4 MB in the end (delta: 227.0 MB). Free memory was 117.4 MB in the beginning and 148.8 MB in the end (delta: -31.4 MB). Peak memory consumption was 195.6 MB. Max. memory is 7.1 GB. [2020-09-04 16:39:06,769 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.67 ms. Allocated memory is still 137.9 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 863.38 ms. Allocated memory was 137.9 MB in the beginning and 203.4 MB in the end (delta: 65.5 MB). Free memory was 99.2 MB in the beginning and 168.7 MB in the end (delta: -69.6 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 82.44 ms. Allocated memory is still 203.4 MB. Free memory was 168.7 MB in the beginning and 166.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 827.60 ms. Allocated memory is still 203.4 MB. Free memory was 166.1 MB in the beginning and 118.0 MB in the end (delta: 48.0 MB). Peak memory consumption was 48.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 28127.34 ms. Allocated memory was 203.4 MB in the beginning and 430.4 MB in the end (delta: 227.0 MB). Free memory was 117.4 MB in the beginning and 148.8 MB in the end (delta: -31.4 MB). Peak memory consumption was 195.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] List a = (List) malloc(sizeof(struct node)); [L522] COND FALSE !(a == 0) [L523] List t; [L524] List p = a; [L525] COND TRUE __VERIFIER_nondet_int() [L526] p->h = 1 [L527] t = (List) malloc(sizeof(struct node)) [L528] COND FALSE !(t == 0) [L529] p->n = t [L530] EXPR p->n [L530] p = p->n [L525] COND FALSE !(__VERIFIER_nondet_int()) [L532] COND TRUE __VERIFIER_nondet_int() [L533] p->h = 2 [L534] t = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(t == 0) [L536] p->n = t [L537] EXPR p->n [L537] p = p->n [L532] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 [L540] p = a [L541] EXPR p->h [L541] COND FALSE !(p->h == 2) [L543] EXPR p->h [L543] COND TRUE p->h == 1 [L544] EXPR p->n [L544] p = p->n [L543] EXPR p->h [L543] COND FALSE !(p->h == 1) [L545] EXPR p->h [L545] COND TRUE p->h != 3 [L546] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 91 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 27.9s, OverallIterations: 17, TraceHistogramMax: 3, AutomataDifference: 20.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 938 SDtfs, 4005 SDslu, 8041 SDs, 0 SdLazy, 7072 SolverSat, 669 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 510 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 459 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2757 ImplicationChecksByTransitivity, 15.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 778 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...