/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:56:38,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:56:38,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:56:38,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 00:56:38,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 00:56:38,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 00:56:38,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 00:56:38,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 00:56:38,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 00:56:38,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 00:56:38,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 00:56:38,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 00:56:38,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:56:38,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:56:38,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:56:38,955 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:56:38,957 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:56:38,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:56:38,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:56:38,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:56:38,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:56:38,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:56:38,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:56:38,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:56:39,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 00:56:39,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 00:56:39,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 00:56:39,011 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 00:56:39,011 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 00:56:39,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 00:56:39,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 00:56:39,014 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 00:56:39,016 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 00:56:39,017 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 00:56:39,018 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 00:56:39,018 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 00:56:39,019 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 00:56:39,019 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 00:56:39,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:56:39,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:56:39,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:56:39,022 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 00:56:39,052 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:56:39,052 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:56:39,057 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:56:39,057 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:56:39,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:56:39,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:56:39,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:56:39,058 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:56:39,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:56:39,058 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:56:39,060 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:56:39,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:56:39,060 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:56:39,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:56:39,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:56:39,062 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:56:39,062 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:56:39,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:56:39,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:56:39,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:56:39,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:56:39,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:56:39,063 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:56:39,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:56:39,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:56:39,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:56:39,544 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:56:39,545 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:56:39,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-11-07 00:56:39,628 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6f0cf297/1061782d0aaf43009a85ea0b9ccee08a/FLAG203104555 [2020-11-07 00:56:40,435 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:56:40,436 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-11-07 00:56:40,459 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6f0cf297/1061782d0aaf43009a85ea0b9ccee08a/FLAG203104555 [2020-11-07 00:56:40,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6f0cf297/1061782d0aaf43009a85ea0b9ccee08a [2020-11-07 00:56:40,664 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:56:40,671 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:56:40,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:56:40,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:56:40,679 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:56:40,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:56:40" (1/1) ... [2020-11-07 00:56:40,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43e9206 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:40, skipping insertion in model container [2020-11-07 00:56:40,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:56:40" (1/1) ... [2020-11-07 00:56:40,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:56:40,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:56:41,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:56:41,229 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:56:41,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:56:41,416 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:56:41,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:41 WrapperNode [2020-11-07 00:56:41,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:56:41,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:56:41,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:56:41,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:56:41,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:41" (1/1) ... [2020-11-07 00:56:41,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:41" (1/1) ... [2020-11-07 00:56:41,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:41" (1/1) ... [2020-11-07 00:56:41,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:41" (1/1) ... [2020-11-07 00:56:41,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:41" (1/1) ... [2020-11-07 00:56:41,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:41" (1/1) ... [2020-11-07 00:56:41,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:41" (1/1) ... [2020-11-07 00:56:41,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:56:41,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:56:41,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:56:41,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:56:41,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:56:41,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:56:41,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:56:41,644 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:56:41,645 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-11-07 00:56:41,645 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-11-07 00:56:41,645 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-11-07 00:56:41,645 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:56:41,645 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:56:41,645 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:56:41,646 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 00:56:41,646 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 00:56:41,646 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:56:41,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:56:41,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 00:56:41,646 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-07 00:56:41,647 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-07 00:56:41,647 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-07 00:56:41,647 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-07 00:56:41,647 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-07 00:56:41,647 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-07 00:56:41,647 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-07 00:56:41,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-07 00:56:41,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-07 00:56:41,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-07 00:56:41,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-07 00:56:41,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-07 00:56:41,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-07 00:56:41,649 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-07 00:56:41,649 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-07 00:56:41,649 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-07 00:56:41,649 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-11-07 00:56:41,649 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-11-07 00:56:41,649 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-07 00:56:41,650 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-07 00:56:41,650 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-07 00:56:41,650 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-07 00:56:41,650 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-07 00:56:41,650 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-07 00:56:41,650 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-07 00:56:41,651 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-07 00:56:41,651 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-07 00:56:41,651 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-07 00:56:41,651 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-07 00:56:41,651 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-07 00:56:41,651 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-07 00:56:41,651 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-07 00:56:41,652 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-07 00:56:41,652 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-07 00:56:41,652 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-07 00:56:41,652 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-07 00:56:41,652 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-07 00:56:41,652 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-07 00:56:41,652 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-07 00:56:41,653 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-07 00:56:41,653 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-07 00:56:41,653 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-07 00:56:41,653 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-07 00:56:41,653 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-07 00:56:41,653 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-07 00:56:41,653 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-07 00:56:41,654 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-07 00:56:41,654 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-07 00:56:41,654 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-07 00:56:41,654 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-07 00:56:41,654 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-07 00:56:41,654 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-07 00:56:41,654 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 00:56:41,654 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-07 00:56:41,655 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-07 00:56:41,655 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-07 00:56:41,655 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-11-07 00:56:41,655 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-07 00:56:41,655 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-07 00:56:41,655 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-07 00:56:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-07 00:56:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-07 00:56:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-07 00:56:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-07 00:56:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-07 00:56:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-07 00:56:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-07 00:56:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-07 00:56:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-07 00:56:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-07 00:56:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-07 00:56:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-07 00:56:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-07 00:56:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-07 00:56:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-07 00:56:41,658 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-07 00:56:41,658 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-07 00:56:41,658 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-07 00:56:41,658 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-07 00:56:41,658 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-07 00:56:41,658 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-07 00:56:41,658 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-07 00:56:41,659 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-07 00:56:41,659 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-07 00:56:41,659 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-07 00:56:41,659 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-07 00:56:41,659 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-07 00:56:41,659 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-07 00:56:41,659 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-07 00:56:41,660 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-07 00:56:41,660 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-07 00:56:41,660 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-07 00:56:41,660 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-07 00:56:41,660 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-07 00:56:41,660 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-07 00:56:41,660 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-07 00:56:41,661 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-07 00:56:41,661 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-07 00:56:41,661 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-07 00:56:41,661 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-07 00:56:41,661 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-07 00:56:41,661 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-07 00:56:41,661 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-07 00:56:41,662 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-07 00:56:41,662 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-11-07 00:56:41,662 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:56:41,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 00:56:41,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-07 00:56:41,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-07 00:56:41,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:56:41,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:56:41,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:56:41,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:56:41,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:56:41,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:56:42,254 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-11-07 00:56:42,664 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:56:42,664 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-07 00:56:42,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:56:42 BoogieIcfgContainer [2020-11-07 00:56:42,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:56:42,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:56:42,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:56:42,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:56:42,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:56:40" (1/3) ... [2020-11-07 00:56:42,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec4be9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:56:42, skipping insertion in model container [2020-11-07 00:56:42,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:56:41" (2/3) ... [2020-11-07 00:56:42,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec4be9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:56:42, skipping insertion in model container [2020-11-07 00:56:42,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:56:42" (3/3) ... [2020-11-07 00:56:42,678 INFO L111 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2020-11-07 00:56:42,693 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:56:42,697 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:56:42,708 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:56:42,733 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:56:42,734 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:56:42,734 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:56:42,734 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:56:42,734 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:56:42,734 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:56:42,734 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:56:42,734 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:56:42,755 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states. [2020-11-07 00:56:42,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-07 00:56:42,770 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:42,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:56:42,771 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:42,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:42,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1423555653, now seen corresponding path program 1 times [2020-11-07 00:56:42,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:42,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71529446] [2020-11-07 00:56:42,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:42,889 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:43,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:43,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71529446] [2020-11-07 00:56:43,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:43,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 00:56:43,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091900498] [2020-11-07 00:56:43,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 00:56:43,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:43,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 00:56:43,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 00:56:43,160 INFO L87 Difference]: Start difference. First operand 187 states. Second operand 3 states. [2020-11-07 00:56:43,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:43,733 INFO L93 Difference]: Finished difference Result 354 states and 415 transitions. [2020-11-07 00:56:43,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 00:56:43,735 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-11-07 00:56:43,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:43,747 INFO L225 Difference]: With dead ends: 354 [2020-11-07 00:56:43,747 INFO L226 Difference]: Without dead ends: 172 [2020-11-07 00:56:43,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 00:56:43,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-11-07 00:56:43,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-11-07 00:56:43,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-11-07 00:56:43,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 189 transitions. [2020-11-07 00:56:43,816 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 189 transitions. Word has length 37 [2020-11-07 00:56:43,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:43,817 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 189 transitions. [2020-11-07 00:56:43,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 00:56:43,817 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 189 transitions. [2020-11-07 00:56:43,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 00:56:43,821 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:43,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:56:43,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:56:43,822 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:43,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:43,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1825754480, now seen corresponding path program 1 times [2020-11-07 00:56:43,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:43,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652037087] [2020-11-07 00:56:43,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:43,834 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:43,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:43,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652037087] [2020-11-07 00:56:43,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:43,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 00:56:43,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198837240] [2020-11-07 00:56:43,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 00:56:43,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:43,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 00:56:43,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:56:43,996 INFO L87 Difference]: Start difference. First operand 172 states and 189 transitions. Second operand 5 states. [2020-11-07 00:56:44,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:44,448 INFO L93 Difference]: Finished difference Result 259 states and 285 transitions. [2020-11-07 00:56:44,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 00:56:44,448 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-11-07 00:56:44,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:44,453 INFO L225 Difference]: With dead ends: 259 [2020-11-07 00:56:44,453 INFO L226 Difference]: Without dead ends: 207 [2020-11-07 00:56:44,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:56:44,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-11-07 00:56:44,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2020-11-07 00:56:44,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-11-07 00:56:44,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 228 transitions. [2020-11-07 00:56:44,484 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 228 transitions. Word has length 47 [2020-11-07 00:56:44,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:44,485 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 228 transitions. [2020-11-07 00:56:44,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 00:56:44,485 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 228 transitions. [2020-11-07 00:56:44,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-07 00:56:44,488 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:44,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:56:44,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:56:44,489 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:44,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:44,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1787311828, now seen corresponding path program 1 times [2020-11-07 00:56:44,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:44,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685730991] [2020-11-07 00:56:44,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:44,511 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:56:44,515 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:44,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:44,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685730991] [2020-11-07 00:56:44,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:44,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 00:56:44,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575683301] [2020-11-07 00:56:44,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 00:56:44,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:44,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 00:56:44,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:56:44,788 INFO L87 Difference]: Start difference. First operand 206 states and 228 transitions. Second operand 7 states. [2020-11-07 00:56:45,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:45,587 INFO L93 Difference]: Finished difference Result 538 states and 604 transitions. [2020-11-07 00:56:45,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 00:56:45,588 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-11-07 00:56:45,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:45,591 INFO L225 Difference]: With dead ends: 538 [2020-11-07 00:56:45,591 INFO L226 Difference]: Without dead ends: 417 [2020-11-07 00:56:45,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-11-07 00:56:45,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-11-07 00:56:45,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 290. [2020-11-07 00:56:45,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-11-07 00:56:45,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 325 transitions. [2020-11-07 00:56:45,646 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 325 transitions. Word has length 60 [2020-11-07 00:56:45,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:45,646 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 325 transitions. [2020-11-07 00:56:45,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 00:56:45,646 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 325 transitions. [2020-11-07 00:56:45,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-11-07 00:56:45,649 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:45,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:56:45,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 00:56:45,650 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:45,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:45,651 INFO L82 PathProgramCache]: Analyzing trace with hash -534721967, now seen corresponding path program 1 times [2020-11-07 00:56:45,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:45,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343206269] [2020-11-07 00:56:45,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:45,797 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-11-07 00:56:45,884 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:56:45,888 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:46,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:46,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:46,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:46,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343206269] [2020-11-07 00:56:46,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:46,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 00:56:46,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590282115] [2020-11-07 00:56:46,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 00:56:46,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:46,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 00:56:46,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:56:46,042 INFO L87 Difference]: Start difference. First operand 290 states and 325 transitions. Second operand 7 states. [2020-11-07 00:56:46,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:46,667 INFO L93 Difference]: Finished difference Result 367 states and 409 transitions. [2020-11-07 00:56:46,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 00:56:46,668 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-11-07 00:56:46,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:46,671 INFO L225 Difference]: With dead ends: 367 [2020-11-07 00:56:46,671 INFO L226 Difference]: Without dead ends: 359 [2020-11-07 00:56:46,672 INFO L677 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 [2020-11-07 00:56:46,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-11-07 00:56:46,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 303. [2020-11-07 00:56:46,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-11-07 00:56:46,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 341 transitions. [2020-11-07 00:56:46,710 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 341 transitions. Word has length 62 [2020-11-07 00:56:46,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:46,711 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 341 transitions. [2020-11-07 00:56:46,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 00:56:46,711 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 341 transitions. [2020-11-07 00:56:46,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-07 00:56:46,714 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:46,714 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:56:46,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 00:56:46,715 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:46,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:46,715 INFO L82 PathProgramCache]: Analyzing trace with hash 846185769, now seen corresponding path program 1 times [2020-11-07 00:56:46,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:46,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721633028] [2020-11-07 00:56:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:46,884 WARN L194 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-11-07 00:56:46,936 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:56:46,941 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:47,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:47,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721633028] [2020-11-07 00:56:47,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:47,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 00:56:47,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370547690] [2020-11-07 00:56:47,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 00:56:47,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:47,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 00:56:47,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:56:47,054 INFO L87 Difference]: Start difference. First operand 303 states and 341 transitions. Second operand 7 states. [2020-11-07 00:56:47,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:47,732 INFO L93 Difference]: Finished difference Result 370 states and 412 transitions. [2020-11-07 00:56:47,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 00:56:47,733 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-11-07 00:56:47,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:47,740 INFO L225 Difference]: With dead ends: 370 [2020-11-07 00:56:47,741 INFO L226 Difference]: Without dead ends: 353 [2020-11-07 00:56:47,741 INFO L677 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 [2020-11-07 00:56:47,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-11-07 00:56:47,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 300. [2020-11-07 00:56:47,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-11-07 00:56:47,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 337 transitions. [2020-11-07 00:56:47,801 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 337 transitions. Word has length 68 [2020-11-07 00:56:47,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:47,801 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 337 transitions. [2020-11-07 00:56:47,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 00:56:47,802 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 337 transitions. [2020-11-07 00:56:47,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-07 00:56:47,804 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:47,804 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:56:47,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 00:56:47,805 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:47,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:47,805 INFO L82 PathProgramCache]: Analyzing trace with hash 664959833, now seen corresponding path program 1 times [2020-11-07 00:56:47,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:47,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677883855] [2020-11-07 00:56:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:47,961 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-11-07 00:56:48,006 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:56:48,010 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:48,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:48,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:48,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:48,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677883855] [2020-11-07 00:56:48,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:48,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 00:56:48,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029268674] [2020-11-07 00:56:48,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 00:56:48,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:48,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 00:56:48,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:56:48,166 INFO L87 Difference]: Start difference. First operand 300 states and 337 transitions. Second operand 7 states. [2020-11-07 00:56:48,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:48,747 INFO L93 Difference]: Finished difference Result 353 states and 393 transitions. [2020-11-07 00:56:48,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:56:48,747 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-11-07 00:56:48,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:48,751 INFO L225 Difference]: With dead ends: 353 [2020-11-07 00:56:48,752 INFO L226 Difference]: Without dead ends: 327 [2020-11-07 00:56:48,753 INFO L677 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 [2020-11-07 00:56:48,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-11-07 00:56:48,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 295. [2020-11-07 00:56:48,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-11-07 00:56:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 331 transitions. [2020-11-07 00:56:48,800 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 331 transitions. Word has length 68 [2020-11-07 00:56:48,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:48,801 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 331 transitions. [2020-11-07 00:56:48,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 00:56:48,801 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 331 transitions. [2020-11-07 00:56:48,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-11-07 00:56:48,802 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:48,803 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:56:48,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 00:56:48,803 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:48,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:48,804 INFO L82 PathProgramCache]: Analyzing trace with hash 41938962, now seen corresponding path program 1 times [2020-11-07 00:56:48,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:48,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270609068] [2020-11-07 00:56:48,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:48,929 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-11-07 00:56:48,974 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:56:48,978 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:49,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:49,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270609068] [2020-11-07 00:56:49,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:49,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-11-07 00:56:49,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242166597] [2020-11-07 00:56:49,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 00:56:49,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:49,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 00:56:49,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-11-07 00:56:49,341 INFO L87 Difference]: Start difference. First operand 295 states and 331 transitions. Second operand 15 states. [2020-11-07 00:56:50,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:50,541 INFO L93 Difference]: Finished difference Result 390 states and 433 transitions. [2020-11-07 00:56:50,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 00:56:50,542 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-11-07 00:56:50,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:50,550 INFO L225 Difference]: With dead ends: 390 [2020-11-07 00:56:50,550 INFO L226 Difference]: Without dead ends: 375 [2020-11-07 00:56:50,551 INFO L677 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 [2020-11-07 00:56:50,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-11-07 00:56:50,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 311. [2020-11-07 00:56:50,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-11-07 00:56:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 348 transitions. [2020-11-07 00:56:50,587 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 348 transitions. Word has length 73 [2020-11-07 00:56:50,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:50,588 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 348 transitions. [2020-11-07 00:56:50,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 00:56:50,589 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 348 transitions. [2020-11-07 00:56:50,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-11-07 00:56:50,590 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:50,591 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:56:50,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 00:56:50,591 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:50,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:50,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1285786464, now seen corresponding path program 1 times [2020-11-07 00:56:50,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:50,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661000738] [2020-11-07 00:56:50,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:50,733 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-11-07 00:56:50,783 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:56:50,789 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:51,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:51,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661000738] [2020-11-07 00:56:51,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:51,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-11-07 00:56:51,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762116036] [2020-11-07 00:56:51,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 00:56:51,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:51,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 00:56:51,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-11-07 00:56:51,162 INFO L87 Difference]: Start difference. First operand 311 states and 348 transitions. Second operand 15 states. [2020-11-07 00:56:52,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:52,642 INFO L93 Difference]: Finished difference Result 414 states and 460 transitions. [2020-11-07 00:56:52,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 00:56:52,643 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-11-07 00:56:52,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:52,646 INFO L225 Difference]: With dead ends: 414 [2020-11-07 00:56:52,646 INFO L226 Difference]: Without dead ends: 406 [2020-11-07 00:56:52,648 INFO L677 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 [2020-11-07 00:56:52,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-11-07 00:56:52,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 333. [2020-11-07 00:56:52,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-11-07 00:56:52,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 373 transitions. [2020-11-07 00:56:52,679 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 373 transitions. Word has length 73 [2020-11-07 00:56:52,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:52,679 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 373 transitions. [2020-11-07 00:56:52,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 00:56:52,679 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 373 transitions. [2020-11-07 00:56:52,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-11-07 00:56:52,686 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:52,686 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:56:52,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 00:56:52,687 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:52,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:52,687 INFO L82 PathProgramCache]: Analyzing trace with hash -287011750, now seen corresponding path program 1 times [2020-11-07 00:56:52,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:52,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097271668] [2020-11-07 00:56:52,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:52,838 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-11-07 00:56:52,885 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:56:52,888 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:53,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:53,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097271668] [2020-11-07 00:56:53,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:53,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-11-07 00:56:53,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039884516] [2020-11-07 00:56:53,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-07 00:56:53,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:53,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-07 00:56:53,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-11-07 00:56:53,500 INFO L87 Difference]: Start difference. First operand 333 states and 373 transitions. Second operand 17 states. [2020-11-07 00:56:55,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:55,331 INFO L93 Difference]: Finished difference Result 398 states and 443 transitions. [2020-11-07 00:56:55,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 00:56:55,332 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-11-07 00:56:55,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:55,335 INFO L225 Difference]: With dead ends: 398 [2020-11-07 00:56:55,335 INFO L226 Difference]: Without dead ends: 390 [2020-11-07 00:56:55,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 00:56:55,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-11-07 00:56:55,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 337. [2020-11-07 00:56:55,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-11-07 00:56:55,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 377 transitions. [2020-11-07 00:56:55,378 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 377 transitions. Word has length 79 [2020-11-07 00:56:55,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:55,378 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 377 transitions. [2020-11-07 00:56:55,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-07 00:56:55,379 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 377 transitions. [2020-11-07 00:56:55,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-11-07 00:56:55,380 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:55,380 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:56:55,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 00:56:55,381 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:55,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:55,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1637564152, now seen corresponding path program 1 times [2020-11-07 00:56:55,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:55,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822599589] [2020-11-07 00:56:55,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:55,511 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-11-07 00:56:55,555 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:56:55,558 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:56,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:56,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822599589] [2020-11-07 00:56:56,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:56,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-11-07 00:56:56,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646568354] [2020-11-07 00:56:56,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-07 00:56:56,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:56,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-07 00:56:56,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-11-07 00:56:56,165 INFO L87 Difference]: Start difference. First operand 337 states and 377 transitions. Second operand 17 states. [2020-11-07 00:56:58,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:58,144 INFO L93 Difference]: Finished difference Result 412 states and 457 transitions. [2020-11-07 00:56:58,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 00:56:58,144 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-11-07 00:56:58,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:58,148 INFO L225 Difference]: With dead ends: 412 [2020-11-07 00:56:58,148 INFO L226 Difference]: Without dead ends: 404 [2020-11-07 00:56:58,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 00:56:58,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-11-07 00:56:58,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 346. [2020-11-07 00:56:58,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2020-11-07 00:56:58,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 387 transitions. [2020-11-07 00:56:58,189 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 387 transitions. Word has length 79 [2020-11-07 00:56:58,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:56:58,190 INFO L481 AbstractCegarLoop]: Abstraction has 346 states and 387 transitions. [2020-11-07 00:56:58,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-07 00:56:58,190 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 387 transitions. [2020-11-07 00:56:58,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-11-07 00:56:58,191 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:56:58,191 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:56:58,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 00:56:58,192 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:56:58,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:56:58,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1456338216, now seen corresponding path program 1 times [2020-11-07 00:56:58,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:56:58,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436392531] [2020-11-07 00:56:58,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:56:58,332 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-11-07 00:56:58,377 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:56:58,380 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:56:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:58,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:56:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:56:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:56:58,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436392531] [2020-11-07 00:56:58,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:56:58,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-11-07 00:56:58,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695254188] [2020-11-07 00:56:58,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 00:56:58,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:56:58,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 00:56:58,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-11-07 00:56:58,681 INFO L87 Difference]: Start difference. First operand 346 states and 387 transitions. Second operand 15 states. [2020-11-07 00:56:59,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:56:59,981 INFO L93 Difference]: Finished difference Result 429 states and 476 transitions. [2020-11-07 00:56:59,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 00:56:59,981 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 79 [2020-11-07 00:56:59,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:56:59,985 INFO L225 Difference]: With dead ends: 429 [2020-11-07 00:56:59,985 INFO L226 Difference]: Without dead ends: 408 [2020-11-07 00:56:59,986 INFO L677 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 [2020-11-07 00:56:59,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-11-07 00:57:00,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 346. [2020-11-07 00:57:00,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2020-11-07 00:57:00,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 386 transitions. [2020-11-07 00:57:00,027 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 386 transitions. Word has length 79 [2020-11-07 00:57:00,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:57:00,027 INFO L481 AbstractCegarLoop]: Abstraction has 346 states and 386 transitions. [2020-11-07 00:57:00,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 00:57:00,028 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 386 transitions. [2020-11-07 00:57:00,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-11-07 00:57:00,029 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:57:00,029 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:57:00,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 00:57:00,029 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:57:00,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:57:00,030 INFO L82 PathProgramCache]: Analyzing trace with hash 2023053233, now seen corresponding path program 2 times [2020-11-07 00:57:00,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:57:00,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526914128] [2020-11-07 00:57:00,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:57:00,185 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-11-07 00:57:00,229 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:57:00,231 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:57:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:57:00,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:57:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:57:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:57:00,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526914128] [2020-11-07 00:57:00,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:57:00,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-11-07 00:57:00,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322556733] [2020-11-07 00:57:00,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 00:57:00,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:57:00,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 00:57:00,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-11-07 00:57:00,780 INFO L87 Difference]: Start difference. First operand 346 states and 386 transitions. Second operand 22 states. [2020-11-07 00:57:03,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:57:03,552 INFO L93 Difference]: Finished difference Result 434 states and 481 transitions. [2020-11-07 00:57:03,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-07 00:57:03,552 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 84 [2020-11-07 00:57:03,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:57:03,555 INFO L225 Difference]: With dead ends: 434 [2020-11-07 00:57:03,555 INFO L226 Difference]: Without dead ends: 426 [2020-11-07 00:57:03,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=493, Invalid=2263, Unknown=0, NotChecked=0, Total=2756 [2020-11-07 00:57:03,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-11-07 00:57:03,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 371. [2020-11-07 00:57:03,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-11-07 00:57:03,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 413 transitions. [2020-11-07 00:57:03,600 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 413 transitions. Word has length 84 [2020-11-07 00:57:03,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:57:03,601 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 413 transitions. [2020-11-07 00:57:03,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 00:57:03,601 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 413 transitions. [2020-11-07 00:57:03,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-11-07 00:57:03,602 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:57:03,602 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:57:03,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 00:57:03,603 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:57:03,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:57:03,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1909669795, now seen corresponding path program 1 times [2020-11-07 00:57:03,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:57:03,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316156089] [2020-11-07 00:57:03,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:57:03,752 WARN L194 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-11-07 00:57:03,797 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:57:03,800 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:57:03,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:57:04,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:57:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:57:04,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:57:04,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316156089] [2020-11-07 00:57:04,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:57:04,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-11-07 00:57:04,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082946127] [2020-11-07 00:57:04,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 00:57:04,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:57:04,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 00:57:04,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-11-07 00:57:04,351 INFO L87 Difference]: Start difference. First operand 371 states and 413 transitions. Second operand 22 states. [2020-11-07 00:57:07,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:57:07,115 INFO L93 Difference]: Finished difference Result 471 states and 522 transitions. [2020-11-07 00:57:07,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-07 00:57:07,115 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 84 [2020-11-07 00:57:07,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:57:07,118 INFO L225 Difference]: With dead ends: 471 [2020-11-07 00:57:07,118 INFO L226 Difference]: Without dead ends: 463 [2020-11-07 00:57:07,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=459, Invalid=2193, Unknown=0, NotChecked=0, Total=2652 [2020-11-07 00:57:07,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2020-11-07 00:57:07,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 383. [2020-11-07 00:57:07,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-11-07 00:57:07,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 426 transitions. [2020-11-07 00:57:07,172 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 426 transitions. Word has length 84 [2020-11-07 00:57:07,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:57:07,172 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 426 transitions. [2020-11-07 00:57:07,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 00:57:07,172 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 426 transitions. [2020-11-07 00:57:07,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-07 00:57:07,174 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:57:07,174 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:57:07,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 00:57:07,175 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:57:07,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:57:07,175 INFO L82 PathProgramCache]: Analyzing trace with hash 938613874, now seen corresponding path program 1 times [2020-11-07 00:57:07,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:57:07,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974744170] [2020-11-07 00:57:07,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:57:07,327 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-11-07 00:57:07,373 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:57:07,375 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:57:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:57:07,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:57:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:57:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:57:07,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974744170] [2020-11-07 00:57:07,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:57:07,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-11-07 00:57:07,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939438080] [2020-11-07 00:57:07,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-07 00:57:07,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:57:07,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-07 00:57:07,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-11-07 00:57:07,849 INFO L87 Difference]: Start difference. First operand 383 states and 426 transitions. Second operand 17 states. [2020-11-07 00:57:09,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:57:09,660 INFO L93 Difference]: Finished difference Result 441 states and 489 transitions. [2020-11-07 00:57:09,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 00:57:09,661 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-11-07 00:57:09,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:57:09,664 INFO L225 Difference]: With dead ends: 441 [2020-11-07 00:57:09,664 INFO L226 Difference]: Without dead ends: 424 [2020-11-07 00:57:09,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 00:57:09,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-11-07 00:57:09,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 385. [2020-11-07 00:57:09,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-11-07 00:57:09,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 428 transitions. [2020-11-07 00:57:09,716 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 428 transitions. Word has length 85 [2020-11-07 00:57:09,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:57:09,716 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 428 transitions. [2020-11-07 00:57:09,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-07 00:57:09,717 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 428 transitions. [2020-11-07 00:57:09,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-07 00:57:09,718 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:57:09,719 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:57:09,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 00:57:09,719 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:57:09,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:57:09,719 INFO L82 PathProgramCache]: Analyzing trace with hash 757387938, now seen corresponding path program 2 times [2020-11-07 00:57:09,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:57:09,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701420403] [2020-11-07 00:57:09,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:57:09,870 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-11-07 00:57:09,914 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:57:09,917 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:57:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:57:10,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:57:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:57:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:57:10,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701420403] [2020-11-07 00:57:10,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:57:10,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-11-07 00:57:10,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84284231] [2020-11-07 00:57:10,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-07 00:57:10,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:57:10,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-07 00:57:10,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-11-07 00:57:10,400 INFO L87 Difference]: Start difference. First operand 385 states and 428 transitions. Second operand 17 states. [2020-11-07 00:57:12,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:57:12,114 INFO L93 Difference]: Finished difference Result 424 states and 470 transitions. [2020-11-07 00:57:12,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-07 00:57:12,118 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-11-07 00:57:12,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:57:12,121 INFO L225 Difference]: With dead ends: 424 [2020-11-07 00:57:12,121 INFO L226 Difference]: Without dead ends: 392 [2020-11-07 00:57:12,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 00:57:12,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-11-07 00:57:12,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 374. [2020-11-07 00:57:12,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-11-07 00:57:12,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 416 transitions. [2020-11-07 00:57:12,188 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 416 transitions. Word has length 85 [2020-11-07 00:57:12,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:57:12,188 INFO L481 AbstractCegarLoop]: Abstraction has 374 states and 416 transitions. [2020-11-07 00:57:12,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-07 00:57:12,188 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 416 transitions. [2020-11-07 00:57:12,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-07 00:57:12,190 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:57:12,191 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:57:12,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 00:57:12,191 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:57:12,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:57:12,192 INFO L82 PathProgramCache]: Analyzing trace with hash 91480208, now seen corresponding path program 2 times [2020-11-07 00:57:12,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:57:12,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510276918] [2020-11-07 00:57:12,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:57:12,323 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-11-07 00:57:12,365 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:57:12,368 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:57:12,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:57:12,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:57:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:57:12,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:57:12,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510276918] [2020-11-07 00:57:12,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:57:12,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-11-07 00:57:12,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801116214] [2020-11-07 00:57:12,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-07 00:57:12,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:57:12,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-07 00:57:12,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-11-07 00:57:12,873 INFO L87 Difference]: Start difference. First operand 374 states and 416 transitions. Second operand 17 states. [2020-11-07 00:57:14,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:57:14,691 INFO L93 Difference]: Finished difference Result 414 states and 458 transitions. [2020-11-07 00:57:14,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-07 00:57:14,692 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-11-07 00:57:14,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:57:14,694 INFO L225 Difference]: With dead ends: 414 [2020-11-07 00:57:14,694 INFO L226 Difference]: Without dead ends: 386 [2020-11-07 00:57:14,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 00:57:14,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-11-07 00:57:14,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 362. [2020-11-07 00:57:14,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-11-07 00:57:14,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 403 transitions. [2020-11-07 00:57:14,738 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 403 transitions. Word has length 85 [2020-11-07 00:57:14,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:57:14,739 INFO L481 AbstractCegarLoop]: Abstraction has 362 states and 403 transitions. [2020-11-07 00:57:14,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-07 00:57:14,739 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 403 transitions. [2020-11-07 00:57:14,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-11-07 00:57:14,740 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:57:14,741 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:57:14,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 00:57:14,741 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:57:14,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:57:14,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1222429321, now seen corresponding path program 1 times [2020-11-07 00:57:14,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:57:14,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761736963] [2020-11-07 00:57:14,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:57:14,890 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-11-07 00:57:14,931 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:57:14,934 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:57:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:57:15,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:57:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:57:15,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:57:15,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761736963] [2020-11-07 00:57:15,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:57:15,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-11-07 00:57:15,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183969339] [2020-11-07 00:57:15,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 00:57:15,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:57:15,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 00:57:15,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-11-07 00:57:15,516 INFO L87 Difference]: Start difference. First operand 362 states and 403 transitions. Second operand 22 states. [2020-11-07 00:57:18,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:57:18,134 INFO L93 Difference]: Finished difference Result 440 states and 487 transitions. [2020-11-07 00:57:18,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 00:57:18,136 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 90 [2020-11-07 00:57:18,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:57:18,138 INFO L225 Difference]: With dead ends: 440 [2020-11-07 00:57:18,138 INFO L226 Difference]: Without dead ends: 423 [2020-11-07 00:57:18,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2020-11-07 00:57:18,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-11-07 00:57:18,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 378. [2020-11-07 00:57:18,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-11-07 00:57:18,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 420 transitions. [2020-11-07 00:57:18,179 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 420 transitions. Word has length 90 [2020-11-07 00:57:18,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:57:18,180 INFO L481 AbstractCegarLoop]: Abstraction has 378 states and 420 transitions. [2020-11-07 00:57:18,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 00:57:18,180 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 420 transitions. [2020-11-07 00:57:18,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-11-07 00:57:18,181 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:57:18,181 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:57:18,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 00:57:18,181 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:57:18,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:57:18,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1041203385, now seen corresponding path program 3 times [2020-11-07 00:57:18,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:57:18,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639585704] [2020-11-07 00:57:18,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:57:18,324 WARN L194 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-11-07 00:57:18,372 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:57:18,374 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:57:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:57:19,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:57:19,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:57:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:57:19,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639585704] [2020-11-07 00:57:19,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:57:19,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-11-07 00:57:19,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448072229] [2020-11-07 00:57:19,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-07 00:57:19,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:57:19,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-07 00:57:19,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-11-07 00:57:19,380 INFO L87 Difference]: Start difference. First operand 378 states and 420 transitions. Second operand 25 states. [2020-11-07 00:57:20,834 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-11-07 00:57:21,524 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-11-07 00:57:21,710 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-11-07 00:57:23,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:57:23,296 INFO L93 Difference]: Finished difference Result 441 states and 488 transitions. [2020-11-07 00:57:23,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-07 00:57:23,297 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 90 [2020-11-07 00:57:23,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:57:23,301 INFO L225 Difference]: With dead ends: 441 [2020-11-07 00:57:23,301 INFO L226 Difference]: Without dead ends: 426 [2020-11-07 00:57:23,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=490, Invalid=2590, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 00:57:23,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-11-07 00:57:23,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 387. [2020-11-07 00:57:23,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-11-07 00:57:23,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 429 transitions. [2020-11-07 00:57:23,358 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 429 transitions. Word has length 90 [2020-11-07 00:57:23,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:57:23,359 INFO L481 AbstractCegarLoop]: Abstraction has 387 states and 429 transitions. [2020-11-07 00:57:23,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-07 00:57:23,359 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 429 transitions. [2020-11-07 00:57:23,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-11-07 00:57:23,361 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:57:23,361 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:57:23,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 00:57:23,361 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:57:23,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:57:23,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1635087611, now seen corresponding path program 1 times [2020-11-07 00:57:23,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:57:23,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905592172] [2020-11-07 00:57:23,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:57:23,517 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-11-07 00:57:23,567 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:57:23,569 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:57:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:57:23,588 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:57:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:57:23,611 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:57:23,662 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 00:57:23,662 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 00:57:23,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 00:57:23,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:57:23 BoogieIcfgContainer [2020-11-07 00:57:23,689 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 00:57:23,691 INFO L168 Benchmark]: Toolchain (without parser) took 43024.56 ms. Allocated memory was 155.2 MB in the beginning and 389.0 MB in the end (delta: 233.8 MB). Free memory was 130.3 MB in the beginning and 340.7 MB in the end (delta: -210.4 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. [2020-11-07 00:57:23,691 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 155.2 MB. Free memory was 129.4 MB in the beginning and 129.3 MB in the end (delta: 120.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:57:23,692 INFO L168 Benchmark]: CACSL2BoogieTranslator took 742.80 ms. Allocated memory is still 155.2 MB. Free memory was 129.7 MB in the beginning and 107.1 MB in the end (delta: 22.6 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-11-07 00:57:23,692 INFO L168 Benchmark]: Boogie Preprocessor took 104.87 ms. Allocated memory is still 155.2 MB. Free memory was 106.9 MB in the beginning and 136.6 MB in the end (delta: -29.8 MB). Peak memory consumption was 5.8 MB. Max. memory is 8.0 GB. [2020-11-07 00:57:23,693 INFO L168 Benchmark]: RCFGBuilder took 1142.51 ms. Allocated memory is still 155.2 MB. Free memory was 136.1 MB in the beginning and 134.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 65.8 MB. Max. memory is 8.0 GB. [2020-11-07 00:57:23,694 INFO L168 Benchmark]: TraceAbstraction took 41020.67 ms. Allocated memory was 155.2 MB in the beginning and 389.0 MB in the end (delta: 233.8 MB). Free memory was 133.8 MB in the beginning and 340.7 MB in the end (delta: -206.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 8.0 GB. [2020-11-07 00:57:23,696 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 155.2 MB. Free memory was 129.4 MB in the beginning and 129.3 MB in the end (delta: 120.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 742.80 ms. Allocated memory is still 155.2 MB. Free memory was 129.7 MB in the beginning and 107.1 MB in the end (delta: 22.6 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 104.87 ms. Allocated memory is still 155.2 MB. Free memory was 106.9 MB in the beginning and 136.6 MB in the end (delta: -29.8 MB). Peak memory consumption was 5.8 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1142.51 ms. Allocated memory is still 155.2 MB. Free memory was 136.1 MB in the beginning and 134.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 65.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 41020.67 ms. Allocated memory was 155.2 MB in the beginning and 389.0 MB in the end (delta: 233.8 MB). Free memory was 133.8 MB in the beginning and 340.7 MB in the end (delta: -206.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L552] struct TreeNode* root = malloc(sizeof(*root)), *n; [L553] root->left = ((void *)0) [L554] root->right = ((void *)0) [L555] COND FALSE !(__VERIFIER_nondet_int()) [L574] n = ((void *)0) [L575] struct TreeNode* pred; [L576] COND TRUE \read(*root) [L577] pred = ((void *)0) [L578] n = root [L579] EXPR n->left [L579] n->left || n->right [L579] EXPR n->right [L579] n->left || n->right [L579] COND FALSE !(n->left || n->right) [L586] COND FALSE !(\read(*pred)) [L592] root = ((void *)0) [L576] COND FALSE !(\read(*root)) [L595] List a = (List) malloc(sizeof(struct node)); [L596] COND FALSE !(a == 0) [L597] List t; [L598] List p = a; [L599] COND TRUE __VERIFIER_nondet_int() [L600] p->h = 1 [L601] t = (List) malloc(sizeof(struct node)) [L602] COND FALSE !(t == 0) [L603] p->n = t [L604] EXPR p->n [L604] p = p->n [L599] COND FALSE !(__VERIFIER_nondet_int()) [L606] COND TRUE __VERIFIER_nondet_int() [L607] p->h = 2 [L608] t = (List) malloc(sizeof(struct node)) [L609] COND FALSE !(t == 0) [L610] p->n = t [L611] EXPR p->n [L611] p = p->n [L606] COND FALSE !(__VERIFIER_nondet_int()) [L613] p->h = 3 [L614] p = a [L615] EXPR p->h [L615] COND FALSE !(p->h == 2) [L617] EXPR p->h [L617] COND TRUE p->h == 1 [L618] EXPR p->n [L618] p = p->n [L617] EXPR p->h [L617] COND FALSE !(p->h == 1) [L619] EXPR p->h [L619] COND TRUE p->h != 3 [L620] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "list_and_tree_cnstr-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 198 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 40.9s, OverallIterations: 19, TraceHistogramMax: 3, AutomataDifference: 29.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3345 SDtfs, 5945 SDslu, 27683 SDs, 0 SdLazy, 12505 SolverSat, 786 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 549 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 485 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2771 ImplicationChecksByTransitivity, 16.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=387occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 18 MinimizatonAttempts, 879 StatesRemovedByMinimization, 17 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...