/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 20:42:27,019 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:42:27,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:42:27,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 20:42:27,063 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 20:42:27,064 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 20:42:27,066 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 20:42:27,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 20:42:27,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 20:42:27,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 20:42:27,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 20:42:27,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 20:42:27,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:42:27,089 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:42:27,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:42:27,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:42:27,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:42:27,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:42:27,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:42:27,099 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:42:27,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:42:27,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:42:27,104 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:42:27,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:42:27,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-21 20:42:27,110 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-21 20:42:27,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-21 20:42:27,111 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-21 20:42:27,112 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-21 20:42:27,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-21 20:42:27,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-21 20:42:27,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-21 20:42:27,115 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-21 20:42:27,117 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-21 20:42:27,118 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-21 20:42:27,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-21 20:42:27,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-21 20:42:27,120 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-21 20:42:27,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:42:27,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:42:27,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:42:27,123 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 20:42:27,136 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:42:27,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:42:27,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:42:27,139 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:42:27,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:42:27,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:42:27,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:42:27,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:42:27,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:42:27,142 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:42:27,142 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:42:27,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:42:27,142 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:42:27,143 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:42:27,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:42:27,143 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:42:27,143 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:42:27,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:42:27,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:42:27,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:42:27,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:42:27,145 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:42:27,145 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:42:27,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:42:27,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:42:27,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:42:27,602 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:42:27,604 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:42:27,605 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2021-02-21 20:42:27,703 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/391408b6c/c01b1a400b7b46cb8eb4803b26709e37/FLAGf3b095a63 [2021-02-21 20:42:28,618 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:42:28,619 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2021-02-21 20:42:28,637 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/391408b6c/c01b1a400b7b46cb8eb4803b26709e37/FLAGf3b095a63 [2021-02-21 20:42:28,839 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/391408b6c/c01b1a400b7b46cb8eb4803b26709e37 [2021-02-21 20:42:28,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:42:28,860 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:42:28,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:42:28,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:42:28,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:42:28,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:42:28" (1/1) ... [2021-02-21 20:42:28,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@235b1ea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:28, skipping insertion in model container [2021-02-21 20:42:28,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:42:28" (1/1) ... [2021-02-21 20:42:28,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:42:28,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:42:29,458 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i[24046,24059] [2021-02-21 20:42:29,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:42:29,483 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:42:29,546 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i[24046,24059] [2021-02-21 20:42:29,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:42:29,606 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:42:29,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:29 WrapperNode [2021-02-21 20:42:29,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:42:29,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:42:29,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:42:29,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:42:29,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:29" (1/1) ... [2021-02-21 20:42:29,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:29" (1/1) ... [2021-02-21 20:42:29,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:29" (1/1) ... [2021-02-21 20:42:29,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:29" (1/1) ... [2021-02-21 20:42:29,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:29" (1/1) ... [2021-02-21 20:42:29,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:29" (1/1) ... [2021-02-21 20:42:29,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:29" (1/1) ... [2021-02-21 20:42:29,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:42:29,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:42:29,689 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:42:29,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:42:29,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:42:29,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:42:29,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:42:29,823 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:42:29,823 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-02-21 20:42:29,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-02-21 20:42:29,824 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-02-21 20:42:29,824 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2021-02-21 20:42:29,824 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:42:29,825 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:42:29,825 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:42:29,826 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-21 20:42:29,826 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-21 20:42:29,826 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:42:29,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:42:29,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 20:42:29,828 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-02-21 20:42:29,828 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-02-21 20:42:29,828 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-21 20:42:29,829 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-21 20:42:29,829 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-21 20:42:29,832 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-21 20:42:29,832 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-21 20:42:29,832 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-21 20:42:29,833 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-21 20:42:29,833 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-21 20:42:29,833 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-21 20:42:29,833 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-21 20:42:29,833 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-21 20:42:29,834 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-21 20:42:29,834 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-21 20:42:29,834 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-21 20:42:29,834 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-21 20:42:29,834 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-21 20:42:29,834 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-21 20:42:29,834 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-21 20:42:29,835 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-21 20:42:29,835 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-21 20:42:29,835 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-21 20:42:29,835 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-21 20:42:29,835 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-21 20:42:29,835 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-21 20:42:29,835 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-21 20:42:29,835 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-21 20:42:29,836 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-21 20:42:29,836 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-21 20:42:29,836 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-21 20:42:29,836 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-21 20:42:29,836 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-21 20:42:29,836 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-21 20:42:29,836 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-21 20:42:29,837 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-21 20:42:29,837 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-21 20:42:29,837 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-21 20:42:29,837 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-21 20:42:29,837 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-21 20:42:29,837 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-21 20:42:29,837 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-21 20:42:29,837 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-21 20:42:29,838 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-21 20:42:29,838 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-21 20:42:29,839 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-21 20:42:29,839 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-21 20:42:29,839 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-21 20:42:29,839 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-21 20:42:29,839 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-21 20:42:29,840 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-21 20:42:29,840 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-21 20:42:29,840 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-21 20:42:29,840 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-21 20:42:29,841 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-21 20:42:29,841 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-21 20:42:29,841 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-02-21 20:42:29,841 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-21 20:42:29,842 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-21 20:42:29,842 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-21 20:42:29,842 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-02-21 20:42:29,842 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-21 20:42:29,842 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-02-21 20:42:29,843 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-21 20:42:29,843 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-21 20:42:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-02-21 20:42:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-21 20:42:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-21 20:42:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-21 20:42:29,846 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-21 20:42:29,846 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-21 20:42:29,846 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-21 20:42:29,846 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-21 20:42:29,846 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-21 20:42:29,846 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-21 20:42:29,847 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-21 20:42:29,847 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-21 20:42:29,848 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-21 20:42:29,848 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-21 20:42:29,848 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-21 20:42:29,848 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-21 20:42:29,849 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-21 20:42:29,849 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-21 20:42:29,849 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-21 20:42:29,849 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-21 20:42:29,849 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-21 20:42:29,849 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-21 20:42:29,849 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-21 20:42:29,850 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-21 20:42:29,850 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-21 20:42:29,850 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-21 20:42:29,850 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-21 20:42:29,850 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-21 20:42:29,850 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-21 20:42:29,850 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-21 20:42:29,850 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-21 20:42:29,851 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-21 20:42:29,851 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-21 20:42:29,851 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-21 20:42:29,851 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-21 20:42:29,851 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-21 20:42:29,851 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-21 20:42:29,851 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-21 20:42:29,851 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-21 20:42:29,852 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-02-21 20:42:29,852 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2021-02-21 20:42:29,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-21 20:42:29,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:42:29,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-21 20:42:29,853 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:42:29,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-21 20:42:29,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:42:29,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:42:29,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:42:29,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:42:29,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:42:30,287 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-02-21 20:42:30,489 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:42:30,490 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-21 20:42:30,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:42:30 BoogieIcfgContainer [2021-02-21 20:42:30,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:42:30,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:42:30,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:42:30,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:42:30,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:42:28" (1/3) ... [2021-02-21 20:42:30,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@672238c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:42:30, skipping insertion in model container [2021-02-21 20:42:30,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:42:29" (2/3) ... [2021-02-21 20:42:30,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@672238c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:42:30, skipping insertion in model container [2021-02-21 20:42:30,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:42:30" (3/3) ... [2021-02-21 20:42:30,503 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2021-02-21 20:42:30,511 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:42:30,517 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:42:30,540 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:42:30,567 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:42:30,568 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:42:30,568 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:42:30,568 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:42:30,568 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:42:30,569 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:42:30,569 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:42:30,569 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:42:30,588 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states. [2021-02-21 20:42:30,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-21 20:42:30,601 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:30,602 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] [2021-02-21 20:42:30,602 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:30,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:30,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1014847540, now seen corresponding path program 1 times [2021-02-21 20:42:30,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:30,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138253505] [2021-02-21 20:42:30,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:30,727 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:30,962 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:30,963 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:30,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:30,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:30,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:30,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:31,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:31,047 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:31,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:31,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-21 20:42:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:31,142 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:31,143 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:31,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:31,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:42:31,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138253505] [2021-02-21 20:42:31,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:31,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-21 20:42:31,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349490085] [2021-02-21 20:42:31,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-21 20:42:31,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:31,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-21 20:42:31,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-21 20:42:31,197 INFO L87 Difference]: Start difference. First operand 106 states. Second operand 7 states. [2021-02-21 20:42:31,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:31,624 INFO L93 Difference]: Finished difference Result 195 states and 223 transitions. [2021-02-21 20:42:31,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 20:42:31,626 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2021-02-21 20:42:31,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:31,636 INFO L225 Difference]: With dead ends: 195 [2021-02-21 20:42:31,636 INFO L226 Difference]: Without dead ends: 116 [2021-02-21 20:42:31,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-02-21 20:42:31,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-02-21 20:42:31,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2021-02-21 20:42:31,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-02-21 20:42:31,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2021-02-21 20:42:31,708 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 36 [2021-02-21 20:42:31,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:31,709 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2021-02-21 20:42:31,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-21 20:42:31,709 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2021-02-21 20:42:31,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-02-21 20:42:31,712 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:31,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:42:31,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:42:31,713 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:31,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:31,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1257517353, now seen corresponding path program 1 times [2021-02-21 20:42:31,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:31,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713398709] [2021-02-21 20:42:31,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:31,803 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:42:31,808 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:31,880 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:31,881 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:31,881 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:31,882 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:31,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:31,887 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:31,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:31,948 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:31,949 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:31,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-21 20:42:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:32,027 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:32,028 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:32,035 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:32,035 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:32,043 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:32,044 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:32,054 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:32,054 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:42:32,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713398709] [2021-02-21 20:42:32,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:32,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 20:42:32,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27925185] [2021-02-21 20:42:32,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 20:42:32,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:32,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 20:42:32,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-02-21 20:42:32,084 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand 9 states. [2021-02-21 20:42:32,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:32,478 INFO L93 Difference]: Finished difference Result 197 states and 217 transitions. [2021-02-21 20:42:32,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-21 20:42:32,479 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2021-02-21 20:42:32,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:32,482 INFO L225 Difference]: With dead ends: 197 [2021-02-21 20:42:32,482 INFO L226 Difference]: Without dead ends: 137 [2021-02-21 20:42:32,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-02-21 20:42:32,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-02-21 20:42:32,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 118. [2021-02-21 20:42:32,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-02-21 20:42:32,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 129 transitions. [2021-02-21 20:42:32,504 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 129 transitions. Word has length 55 [2021-02-21 20:42:32,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:32,505 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 129 transitions. [2021-02-21 20:42:32,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 20:42:32,505 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 129 transitions. [2021-02-21 20:42:32,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-02-21 20:42:32,508 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:32,508 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:42:32,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:42:32,509 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:32,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:32,510 INFO L82 PathProgramCache]: Analyzing trace with hash 2021621228, now seen corresponding path program 2 times [2021-02-21 20:42:32,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:32,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714673600] [2021-02-21 20:42:32,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:32,606 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:42:32,611 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:32,669 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:32,672 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:32,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:32,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:32,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:32,715 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:32,716 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:32,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-21 20:42:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:32,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:32,824 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:32,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:32,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:42:32,833 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:32,834 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:42:32,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:32,844 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:42:32,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:32,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:42:32,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714673600] [2021-02-21 20:42:32,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:32,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-21 20:42:32,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65959882] [2021-02-21 20:42:32,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-21 20:42:32,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:32,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-21 20:42:32,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-21 20:42:32,884 INFO L87 Difference]: Start difference. First operand 118 states and 129 transitions. Second operand 7 states. [2021-02-21 20:42:33,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:33,250 INFO L93 Difference]: Finished difference Result 199 states and 219 transitions. [2021-02-21 20:42:33,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 20:42:33,251 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 74 [2021-02-21 20:42:33,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:33,258 INFO L225 Difference]: With dead ends: 199 [2021-02-21 20:42:33,259 INFO L226 Difference]: Without dead ends: 118 [2021-02-21 20:42:33,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-02-21 20:42:33,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-02-21 20:42:33,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-02-21 20:42:33,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-02-21 20:42:33,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2021-02-21 20:42:33,299 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 74 [2021-02-21 20:42:33,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:33,301 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2021-02-21 20:42:33,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-21 20:42:33,301 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2021-02-21 20:42:33,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-02-21 20:42:33,312 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:33,312 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:42:33,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 20:42:33,312 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:33,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:33,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1186913634, now seen corresponding path program 1 times [2021-02-21 20:42:33,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:33,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583137243] [2021-02-21 20:42:33,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:33,503 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:42:33,509 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:33,580 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:33,581 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:33,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:33,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:33,586 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:33,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:33,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:33,613 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:33,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:33,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-21 20:42:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:33,676 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:33,677 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:33,684 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:33,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:33,694 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:33,695 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:33,705 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:33,705 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:33,716 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:33,717 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:33,730 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:33,730 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:42:33,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583137243] [2021-02-21 20:42:33,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:33,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-21 20:42:33,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589087312] [2021-02-21 20:42:33,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-21 20:42:33,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:33,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-21 20:42:33,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-21 20:42:33,759 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand 11 states. [2021-02-21 20:42:34,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:34,189 INFO L93 Difference]: Finished difference Result 218 states and 237 transitions. [2021-02-21 20:42:34,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-21 20:42:34,190 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 75 [2021-02-21 20:42:34,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:34,192 INFO L225 Difference]: With dead ends: 218 [2021-02-21 20:42:34,192 INFO L226 Difference]: Without dead ends: 158 [2021-02-21 20:42:34,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-02-21 20:42:34,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-02-21 20:42:34,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 139. [2021-02-21 20:42:34,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2021-02-21 20:42:34,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 150 transitions. [2021-02-21 20:42:34,211 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 150 transitions. Word has length 75 [2021-02-21 20:42:34,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:34,212 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 150 transitions. [2021-02-21 20:42:34,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-21 20:42:34,212 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 150 transitions. [2021-02-21 20:42:34,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-02-21 20:42:34,213 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:34,214 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-02-21 20:42:34,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 20:42:34,214 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:34,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:34,215 INFO L82 PathProgramCache]: Analyzing trace with hash 896284781, now seen corresponding path program 2 times [2021-02-21 20:42:34,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:34,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608699418] [2021-02-21 20:42:34,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:34,456 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:42:34,465 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:34,525 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:34,526 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:34,527 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:34,527 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:34,531 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:34,532 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:34,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:34,561 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:34,562 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:34,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-21 20:42:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:34,635 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:34,636 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:34,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:34,644 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:34,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:34,653 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:34,662 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:34,664 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:34,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:34,680 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:34,691 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:34,692 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:34,705 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:34,706 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:34,722 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:34,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:42:34,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608699418] [2021-02-21 20:42:34,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:34,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-21 20:42:34,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107635830] [2021-02-21 20:42:34,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-21 20:42:34,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:34,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-21 20:42:34,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-02-21 20:42:34,778 INFO L87 Difference]: Start difference. First operand 139 states and 150 transitions. Second operand 13 states. [2021-02-21 20:42:35,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:35,271 INFO L93 Difference]: Finished difference Result 239 states and 259 transitions. [2021-02-21 20:42:35,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-21 20:42:35,271 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 95 [2021-02-21 20:42:35,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:35,276 INFO L225 Difference]: With dead ends: 239 [2021-02-21 20:42:35,276 INFO L226 Difference]: Without dead ends: 179 [2021-02-21 20:42:35,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-02-21 20:42:35,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-02-21 20:42:35,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 160. [2021-02-21 20:42:35,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2021-02-21 20:42:35,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 172 transitions. [2021-02-21 20:42:35,297 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 172 transitions. Word has length 95 [2021-02-21 20:42:35,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:35,298 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 172 transitions. [2021-02-21 20:42:35,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-21 20:42:35,298 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 172 transitions. [2021-02-21 20:42:35,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-02-21 20:42:35,299 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:35,299 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:42:35,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 20:42:35,300 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:35,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:35,301 INFO L82 PathProgramCache]: Analyzing trace with hash -177168392, now seen corresponding path program 3 times [2021-02-21 20:42:35,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:35,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802267261] [2021-02-21 20:42:35,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:35,553 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:42:35,561 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:35,623 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:35,624 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:35,625 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:35,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:35,629 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:35,630 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:35,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:35,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:35,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:35,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-21 20:42:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:35,763 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:35,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:35,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:35,771 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:35,780 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:35,781 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:35,792 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:35,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:35,806 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:35,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:35,819 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:35,820 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:35,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:35,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:35,850 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:35,850 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:35,865 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:35,866 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:35,881 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:35,882 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:42:35,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802267261] [2021-02-21 20:42:35,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:35,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-02-21 20:42:35,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62121336] [2021-02-21 20:42:35,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-21 20:42:35,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:35,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-21 20:42:35,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-02-21 20:42:35,959 INFO L87 Difference]: Start difference. First operand 160 states and 172 transitions. Second operand 15 states. [2021-02-21 20:42:36,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:36,495 INFO L93 Difference]: Finished difference Result 260 states and 281 transitions. [2021-02-21 20:42:36,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-21 20:42:36,496 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 115 [2021-02-21 20:42:36,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:36,497 INFO L225 Difference]: With dead ends: 260 [2021-02-21 20:42:36,498 INFO L226 Difference]: Without dead ends: 200 [2021-02-21 20:42:36,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-02-21 20:42:36,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-02-21 20:42:36,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 181. [2021-02-21 20:42:36,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2021-02-21 20:42:36,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 194 transitions. [2021-02-21 20:42:36,518 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 194 transitions. Word has length 115 [2021-02-21 20:42:36,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:36,518 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 194 transitions. [2021-02-21 20:42:36,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-21 20:42:36,519 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 194 transitions. [2021-02-21 20:42:36,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-02-21 20:42:36,520 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:36,520 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:42:36,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 20:42:36,521 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:36,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:36,521 INFO L82 PathProgramCache]: Analyzing trace with hash -313994237, now seen corresponding path program 4 times [2021-02-21 20:42:36,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:36,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937474867] [2021-02-21 20:42:36,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:36,767 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:42:36,796 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:36,948 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:36,949 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:36,950 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:36,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:36,955 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:36,956 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:36,960 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:36,961 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:36,966 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:36,967 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-21 20:42:36,973 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:36,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:37,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:37,008 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:37,010 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:37,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-21 20:42:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:37,128 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:37,129 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:37,130 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:37,131 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:37,141 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:37,141 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:37,153 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:37,154 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:37,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:37,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:42:37,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:37,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:42:37,200 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:37,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 20:42:37,225 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:37,226 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 20:42:37,243 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:37,244 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 20:42:37,264 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:37,271 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 20:42:37,292 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:37,293 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 20:42:37,310 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:37,311 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 20:42:37,329 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:37,330 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:37,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:37,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:37,370 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:37,371 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:42:37,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937474867] [2021-02-21 20:42:37,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:37,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-21 20:42:37,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689497359] [2021-02-21 20:42:37,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-21 20:42:37,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:37,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-21 20:42:37,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-02-21 20:42:37,466 INFO L87 Difference]: Start difference. First operand 181 states and 194 transitions. Second operand 17 states. [2021-02-21 20:42:38,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:38,416 INFO L93 Difference]: Finished difference Result 312 states and 338 transitions. [2021-02-21 20:42:38,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-21 20:42:38,416 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 135 [2021-02-21 20:42:38,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:38,418 INFO L225 Difference]: With dead ends: 312 [2021-02-21 20:42:38,419 INFO L226 Difference]: Without dead ends: 257 [2021-02-21 20:42:38,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2021-02-21 20:42:38,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-02-21 20:42:38,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 187. [2021-02-21 20:42:38,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2021-02-21 20:42:38,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 201 transitions. [2021-02-21 20:42:38,448 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 201 transitions. Word has length 135 [2021-02-21 20:42:38,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:38,449 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 201 transitions. [2021-02-21 20:42:38,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-21 20:42:38,449 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 201 transitions. [2021-02-21 20:42:38,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-02-21 20:42:38,450 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:38,451 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:42:38,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 20:42:38,451 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:38,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:38,452 INFO L82 PathProgramCache]: Analyzing trace with hash -696625984, now seen corresponding path program 1 times [2021-02-21 20:42:38,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:38,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58300283] [2021-02-21 20:42:38,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:38,752 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:42:38,763 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:38,899 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:38,900 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:38,902 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:38,902 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 20:42:38,911 WARN L141 QuantifierPusher]: treesize reduction 9, result has 59.1 percent of original size [2021-02-21 20:42:38,911 WARN L147 QuantifierPusher]: treesize reduction 9, result has 59.1 percent of original size 13 [2021-02-21 20:42:38,919 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:38,920 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:38,926 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:38,927 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-21 20:42:38,935 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:38,935 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-21 20:42:38,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:38,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:38,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:38,970 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:38,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:38,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-21 20:42:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:39,068 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:39,069 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:39,069 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:39,070 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:39,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:39,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:39,094 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:39,095 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:39,108 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:39,109 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 20:42:39,126 WARN L141 QuantifierPusher]: treesize reduction 5, result has 61.5 percent of original size [2021-02-21 20:42:39,127 WARN L147 QuantifierPusher]: treesize reduction 5, result has 61.5 percent of original size 8 [2021-02-21 20:42:39,145 WARN L141 QuantifierPusher]: treesize reduction 5, result has 77.3 percent of original size [2021-02-21 20:42:39,146 WARN L147 QuantifierPusher]: treesize reduction 5, result has 77.3 percent of original size 17 [2021-02-21 20:42:39,170 WARN L141 QuantifierPusher]: treesize reduction 5, result has 81.5 percent of original size [2021-02-21 20:42:39,171 WARN L147 QuantifierPusher]: treesize reduction 5, result has 81.5 percent of original size 22 [2021-02-21 20:42:39,193 WARN L141 QuantifierPusher]: treesize reduction 5, result has 77.3 percent of original size [2021-02-21 20:42:39,195 WARN L147 QuantifierPusher]: treesize reduction 5, result has 77.3 percent of original size 17 [2021-02-21 20:42:39,197 WARN L141 QuantifierPusher]: treesize reduction 5, result has 77.3 percent of original size [2021-02-21 20:42:39,198 WARN L147 QuantifierPusher]: treesize reduction 5, result has 77.3 percent of original size 17 [2021-02-21 20:42:39,199 WARN L141 QuantifierPusher]: treesize reduction 5, result has 77.3 percent of original size [2021-02-21 20:42:39,200 WARN L147 QuantifierPusher]: treesize reduction 5, result has 77.3 percent of original size 17 [2021-02-21 20:42:39,201 WARN L141 QuantifierPusher]: treesize reduction 5, result has 72.2 percent of original size [2021-02-21 20:42:39,202 WARN L147 QuantifierPusher]: treesize reduction 5, result has 72.2 percent of original size 13 [2021-02-21 20:42:39,225 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:39,226 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 20:42:39,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:39,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 20:42:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:42:39,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58300283] [2021-02-21 20:42:39,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:39,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-02-21 20:42:39,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990322771] [2021-02-21 20:42:39,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-21 20:42:39,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:39,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-21 20:42:39,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-02-21 20:42:39,367 INFO L87 Difference]: Start difference. First operand 187 states and 201 transitions. Second operand 18 states. [2021-02-21 20:42:40,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:40,695 INFO L93 Difference]: Finished difference Result 290 states and 314 transitions. [2021-02-21 20:42:40,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-21 20:42:40,696 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 137 [2021-02-21 20:42:40,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:40,698 INFO L225 Difference]: With dead ends: 290 [2021-02-21 20:42:40,698 INFO L226 Difference]: Without dead ends: 235 [2021-02-21 20:42:40,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2021-02-21 20:42:40,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-02-21 20:42:40,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 191. [2021-02-21 20:42:40,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2021-02-21 20:42:40,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 205 transitions. [2021-02-21 20:42:40,732 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 205 transitions. Word has length 137 [2021-02-21 20:42:40,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:40,733 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 205 transitions. [2021-02-21 20:42:40,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-21 20:42:40,733 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 205 transitions. [2021-02-21 20:42:40,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-02-21 20:42:40,735 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:40,735 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:42:40,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 20:42:40,736 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:40,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:40,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1130029170, now seen corresponding path program 1 times [2021-02-21 20:42:40,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:40,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574840255] [2021-02-21 20:42:40,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:40,983 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:42:40,994 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:41,071 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,072 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:41,072 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,073 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:41,076 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:41,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:42:41,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,088 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-21 20:42:41,094 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,095 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:41,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:42:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:41,121 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:41,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-21 20:42:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:42:41,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,202 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:42:41,203 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:41,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,214 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:41,226 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,228 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:42:41,240 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,241 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:42:41,253 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,254 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:42:41,268 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 20:42:41,289 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,290 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 20:42:41,308 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 20:42:41,332 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,333 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 20:42:41,351 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,352 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 20:42:41,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,374 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 20:42:41,394 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:41,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,419 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:41,441 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:42:41,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:42:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:42:41,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574840255] [2021-02-21 20:42:41,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:42:41,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-21 20:42:41,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694545431] [2021-02-21 20:42:41,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-21 20:42:41,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:42:41,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-21 20:42:41,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-02-21 20:42:41,548 INFO L87 Difference]: Start difference. First operand 191 states and 205 transitions. Second operand 17 states. [2021-02-21 20:42:42,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:42:42,490 INFO L93 Difference]: Finished difference Result 285 states and 305 transitions. [2021-02-21 20:42:42,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-21 20:42:42,491 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 139 [2021-02-21 20:42:42,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:42:42,493 INFO L225 Difference]: With dead ends: 285 [2021-02-21 20:42:42,493 INFO L226 Difference]: Without dead ends: 257 [2021-02-21 20:42:42,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2021-02-21 20:42:42,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-02-21 20:42:42,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 199. [2021-02-21 20:42:42,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2021-02-21 20:42:42,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 213 transitions. [2021-02-21 20:42:42,527 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 213 transitions. Word has length 139 [2021-02-21 20:42:42,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:42:42,527 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 213 transitions. [2021-02-21 20:42:42,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-21 20:42:42,527 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 213 transitions. [2021-02-21 20:42:42,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-02-21 20:42:42,529 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:42:42,529 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:42:42,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 20:42:42,530 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:42:42,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:42:42,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1346712291, now seen corresponding path program 1 times [2021-02-21 20:42:42,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:42:42,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614242714] [2021-02-21 20:42:42,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:42:42,786 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:42:42,797 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:42:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:42:42,865 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:42:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:42:42,930 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:42:43,003 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 20:42:43,003 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 20:42:43,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 20:42:43,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:42:43 BoogieIcfgContainer [2021-02-21 20:42:43,028 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:42:43,029 INFO L168 Benchmark]: Toolchain (without parser) took 14181.72 ms. Allocated memory was 157.3 MB in the beginning and 327.2 MB in the end (delta: 169.9 MB). Free memory was 132.6 MB in the beginning and 243.3 MB in the end (delta: -110.6 MB). Peak memory consumption was 59.9 MB. Max. memory is 8.0 GB. [2021-02-21 20:42:43,029 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 157.3 MB. Free memory is still 129.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:42:43,029 INFO L168 Benchmark]: CACSL2BoogieTranslator took 742.41 ms. Allocated memory is still 157.3 MB. Free memory was 131.5 MB in the beginning and 109.6 MB in the end (delta: 21.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-02-21 20:42:43,030 INFO L168 Benchmark]: Boogie Preprocessor took 80.39 ms. Allocated memory is still 157.3 MB. Free memory was 109.6 MB in the beginning and 106.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-02-21 20:42:43,030 INFO L168 Benchmark]: RCFGBuilder took 803.08 ms. Allocated memory is still 157.3 MB. Free memory was 106.8 MB in the beginning and 93.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 14.3 MB. Max. memory is 8.0 GB. [2021-02-21 20:42:43,030 INFO L168 Benchmark]: TraceAbstraction took 12533.13 ms. Allocated memory was 157.3 MB in the beginning and 327.2 MB in the end (delta: 169.9 MB). Free memory was 92.7 MB in the beginning and 243.3 MB in the end (delta: -150.5 MB). Peak memory consumption was 19.4 MB. Max. memory is 8.0 GB. [2021-02-21 20:42:43,032 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 157.3 MB. Free memory is still 129.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 742.41 ms. Allocated memory is still 157.3 MB. Free memory was 131.5 MB in the beginning and 109.6 MB in the end (delta: 21.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 80.39 ms. Allocated memory is still 157.3 MB. Free memory was 109.6 MB in the beginning and 106.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 803.08 ms. Allocated memory is still 157.3 MB. Free memory was 106.8 MB in the beginning and 93.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 14.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 12533.13 ms. Allocated memory was 157.3 MB in the beginning and 327.2 MB in the end (delta: 169.9 MB). Free memory was 92.7 MB in the beginning and 243.3 MB in the end (delta: -150.5 MB). Peak memory consumption was 19.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 616]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L599] const int len = 5; [L600] CALL, EXPR dll_create(len) [L579] DLL head = ((void *)0); [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND FALSE !(\read(head)) [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND FALSE !(len > 0) [L596] return head; [L600] RET, EXPR dll_create(len) [L600] DLL head = dll_create(len); [L601] head->next [L601] COND TRUE head->next [L602] EXPR head->data_0 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 [L602] EXPR head->data_1 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L602] EXPR head->data_2 [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L602] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L616] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 122 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.4s, OverallIterations: 10, TraceHistogramMax: 5, AutomataDifference: 5.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 868 SDtfs, 1368 SDslu, 6110 SDs, 0 SdLazy, 3386 SolverSat, 231 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 254 GetRequests, 57 SyntacticMatches, 11 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=199occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 267 StatesRemovedByMinimization, 8 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...