/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-properties/list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:49:50,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:49:50,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:49:50,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 00:49:50,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 00:49:50,251 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 00:49:50,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 00:49:50,256 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 00:49:50,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 00:49:50,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 00:49:50,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 00:49:50,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 00:49:50,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:49:50,265 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:49:50,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:49:50,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:49:50,269 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:49:50,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:49:50,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:49:50,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:49:50,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:49:50,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:49:50,300 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:49:50,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:49:50,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 00:49:50,315 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 00:49:50,316 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 00:49:50,317 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 00:49:50,322 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 00:49:50,324 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 00:49:50,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 00:49:50,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 00:49:50,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 00:49:50,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 00:49:50,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 00:49:50,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 00:49:50,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 00:49:50,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 00:49:50,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:49:50,333 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:49:50,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:49:50,335 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 00:49:50,362 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:49:50,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:49:50,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:49:50,368 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:49:50,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:49:50,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:49:50,369 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:49:50,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:49:50,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:49:50,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:49:50,370 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:49:50,371 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:49:50,371 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:49:50,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:49:50,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:49:50,372 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:49:50,372 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:49:50,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:49:50,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:49:50,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:49:50,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:49:50,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:49:50,374 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:49:50,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:49:50,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:49:50,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:49:50,890 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:49:50,892 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:49:50,893 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-11-07 00:49:50,977 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c9fe570e/b310e1763e14470ba9953819802f9fc5/FLAGccbce6ec9 [2020-11-07 00:49:51,754 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:49:51,755 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list-2.i [2020-11-07 00:49:51,773 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c9fe570e/b310e1763e14470ba9953819802f9fc5/FLAGccbce6ec9 [2020-11-07 00:49:52,050 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c9fe570e/b310e1763e14470ba9953819802f9fc5 [2020-11-07 00:49:52,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:49:52,061 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:49:52,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:49:52,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:49:52,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:49:52,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:49:52" (1/1) ... [2020-11-07 00:49:52,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f91586f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:52, skipping insertion in model container [2020-11-07 00:49:52,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:49:52" (1/1) ... [2020-11-07 00:49:52,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:49:52,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:49:52,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:49:52,506 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:49:52,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:49:52,614 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:49:52,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:52 WrapperNode [2020-11-07 00:49:52,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:49:52,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:49:52,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:49:52,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:49:52,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:52" (1/1) ... [2020-11-07 00:49:52,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:52" (1/1) ... [2020-11-07 00:49:52,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:52" (1/1) ... [2020-11-07 00:49:52,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:52" (1/1) ... [2020-11-07 00:49:52,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:52" (1/1) ... [2020-11-07 00:49:52,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:52" (1/1) ... [2020-11-07 00:49:52,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:52" (1/1) ... [2020-11-07 00:49:52,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:49:52,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:49:52,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:49:52,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:49:52,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:49:52,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:49:52,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:49:52,823 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:49:52,823 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-11-07 00:49:52,823 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-11-07 00:49:52,823 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-11-07 00:49:52,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-11-07 00:49:52,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-11-07 00:49:52,824 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-11-07 00:49:52,824 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:49:52,824 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:49:52,825 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:49:52,825 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 00:49:52,825 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 00:49:52,825 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:49:52,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:49:52,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 00:49:52,826 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-07 00:49:52,827 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-07 00:49:52,827 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-07 00:49:52,828 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-07 00:49:52,829 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-07 00:49:52,832 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-07 00:49:52,832 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-07 00:49:52,832 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-07 00:49:52,832 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-07 00:49:52,832 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-07 00:49:52,833 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-07 00:49:52,833 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-07 00:49:52,833 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-07 00:49:52,834 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-07 00:49:52,834 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-07 00:49:52,834 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-07 00:49:52,834 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-11-07 00:49:52,839 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-11-07 00:49:52,840 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-11-07 00:49:52,840 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-11-07 00:49:52,840 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-11-07 00:49:52,841 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-07 00:49:52,841 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-07 00:49:52,841 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-07 00:49:52,841 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-07 00:49:52,841 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-07 00:49:52,841 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-07 00:49:52,841 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-07 00:49:52,842 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-07 00:49:52,842 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-07 00:49:52,842 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-07 00:49:52,842 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-07 00:49:52,842 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-07 00:49:52,842 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-07 00:49:52,842 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-07 00:49:52,842 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-07 00:49:52,843 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-07 00:49:52,843 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-07 00:49:52,843 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-07 00:49:52,843 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-07 00:49:52,843 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-07 00:49:52,843 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-07 00:49:52,843 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-07 00:49:52,844 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-07 00:49:52,844 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-07 00:49:52,845 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-07 00:49:52,845 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-07 00:49:52,845 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-07 00:49:52,845 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-07 00:49:52,845 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-07 00:49:52,845 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-07 00:49:52,846 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-07 00:49:52,846 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-07 00:49:52,846 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-07 00:49:52,846 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-07 00:49:52,846 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 00:49:52,846 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-07 00:49:52,846 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-07 00:49:52,847 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-07 00:49:52,847 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-07 00:49:52,847 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-07 00:49:52,847 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-07 00:49:52,847 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-07 00:49:52,848 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-07 00:49:52,848 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-07 00:49:52,849 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-07 00:49:52,849 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-07 00:49:52,849 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-07 00:49:52,849 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-07 00:49:52,849 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-07 00:49:52,849 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-07 00:49:52,849 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-07 00:49:52,849 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-07 00:49:52,850 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-07 00:49:52,850 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-07 00:49:52,850 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-07 00:49:52,850 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-07 00:49:52,850 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-07 00:49:52,850 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-07 00:49:52,850 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-07 00:49:52,851 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-07 00:49:52,851 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-07 00:49:52,851 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-07 00:49:52,851 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-07 00:49:52,851 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-07 00:49:52,851 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-07 00:49:52,851 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-07 00:49:52,852 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-07 00:49:52,852 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-07 00:49:52,852 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-07 00:49:52,852 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-07 00:49:52,852 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-07 00:49:52,852 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-07 00:49:52,852 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-07 00:49:52,852 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-07 00:49:52,852 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-07 00:49:52,852 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-07 00:49:52,853 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-07 00:49:52,853 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-07 00:49:52,853 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-07 00:49:52,853 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-07 00:49:52,853 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-07 00:49:52,853 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-07 00:49:52,853 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-07 00:49:52,853 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-07 00:49:52,854 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-07 00:49:52,854 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-11-07 00:49:52,854 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:49:52,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 00:49:52,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:49:52,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-07 00:49:52,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-07 00:49:52,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:49:52,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:49:52,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:49:52,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:49:52,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:49:53,274 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-11-07 00:49:53,581 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:49:53,581 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-07 00:49:53,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:49:53 BoogieIcfgContainer [2020-11-07 00:49:53,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:49:53,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:49:53,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:49:53,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:49:53,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:49:52" (1/3) ... [2020-11-07 00:49:53,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dd86945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:49:53, skipping insertion in model container [2020-11-07 00:49:53,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:52" (2/3) ... [2020-11-07 00:49:53,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dd86945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:49:53, skipping insertion in model container [2020-11-07 00:49:53,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:49:53" (3/3) ... [2020-11-07 00:49:53,595 INFO L111 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-11-07 00:49:53,615 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:49:53,620 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:49:53,635 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:49:53,661 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:49:53,661 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:49:53,662 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:49:53,662 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:49:53,662 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:49:53,662 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:49:53,662 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:49:53,662 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:49:53,679 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states. [2020-11-07 00:49:53,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-07 00:49:53,690 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:49:53,691 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] [2020-11-07 00:49:53,692 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:49:53,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:49:53,699 INFO L82 PathProgramCache]: Analyzing trace with hash 2107792998, now seen corresponding path program 1 times [2020-11-07 00:49:53,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:49:53,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778046354] [2020-11-07 00:49:53,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:49:53,815 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:49:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:54,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:49:54,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:49:54,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778046354] [2020-11-07 00:49:54,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:49:54,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 00:49:54,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055103991] [2020-11-07 00:49:54,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 00:49:54,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:49:54,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 00:49:54,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 00:49:54,139 INFO L87 Difference]: Start difference. First operand 78 states. Second operand 3 states. [2020-11-07 00:49:54,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:49:54,416 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2020-11-07 00:49:54,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 00:49:54,418 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-11-07 00:49:54,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:49:54,437 INFO L225 Difference]: With dead ends: 122 [2020-11-07 00:49:54,438 INFO L226 Difference]: Without dead ends: 63 [2020-11-07 00:49:54,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 00:49:54,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-07 00:49:54,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-07 00:49:54,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-07 00:49:54,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-11-07 00:49:54,520 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 28 [2020-11-07 00:49:54,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:49:54,521 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-11-07 00:49:54,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 00:49:54,522 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-11-07 00:49:54,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-07 00:49:54,523 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:49:54,524 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] [2020-11-07 00:49:54,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:49:54,524 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:49:54,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:49:54,525 INFO L82 PathProgramCache]: Analyzing trace with hash 166627174, now seen corresponding path program 1 times [2020-11-07 00:49:54,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:49:54,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382254244] [2020-11-07 00:49:54,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:49:54,538 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:49:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:54,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:49:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:54,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:49:54,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382254244] [2020-11-07 00:49:54,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:49:54,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 00:49:54,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134374446] [2020-11-07 00:49:54,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 00:49:54,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:49:54,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 00:49:54,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:49:54,804 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 7 states. [2020-11-07 00:49:55,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:49:55,111 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2020-11-07 00:49:55,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 00:49:55,112 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-11-07 00:49:55,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:49:55,116 INFO L225 Difference]: With dead ends: 140 [2020-11-07 00:49:55,117 INFO L226 Difference]: Without dead ends: 132 [2020-11-07 00:49:55,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:49:55,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-11-07 00:49:55,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 76. [2020-11-07 00:49:55,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-07 00:49:55,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-11-07 00:49:55,137 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 36 [2020-11-07 00:49:55,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:49:55,137 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-11-07 00:49:55,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 00:49:55,137 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-11-07 00:49:55,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-07 00:49:55,139 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:49:55,139 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:49:55,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:49:55,140 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:49:55,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:49:55,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1766737650, now seen corresponding path program 1 times [2020-11-07 00:49:55,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:49:55,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593356014] [2020-11-07 00:49:55,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:49:55,227 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:49:55,232 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:49:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:55,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:49:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:49:55,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593356014] [2020-11-07 00:49:55,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:49:55,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 00:49:55,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122488132] [2020-11-07 00:49:55,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 00:49:55,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:49:55,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 00:49:55,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:49:55,407 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 7 states. [2020-11-07 00:49:55,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:49:55,714 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2020-11-07 00:49:55,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 00:49:55,714 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-11-07 00:49:55,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:49:55,716 INFO L225 Difference]: With dead ends: 143 [2020-11-07 00:49:55,716 INFO L226 Difference]: Without dead ends: 122 [2020-11-07 00:49:55,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:49:55,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-07 00:49:55,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 76. [2020-11-07 00:49:55,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-07 00:49:55,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2020-11-07 00:49:55,729 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 42 [2020-11-07 00:49:55,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:49:55,730 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2020-11-07 00:49:55,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 00:49:55,730 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2020-11-07 00:49:55,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-07 00:49:55,732 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:49:55,732 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:49:55,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 00:49:55,732 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:49:55,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:49:55,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1585511714, now seen corresponding path program 1 times [2020-11-07 00:49:55,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:49:55,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295707607] [2020-11-07 00:49:55,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:49:55,760 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:49:55,765 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:49:55,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:55,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:49:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:49:55,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295707607] [2020-11-07 00:49:55,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:49:55,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 00:49:55,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389166193] [2020-11-07 00:49:55,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 00:49:55,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:49:55,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 00:49:55,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:49:55,864 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 7 states. [2020-11-07 00:49:56,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:49:56,154 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2020-11-07 00:49:56,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:49:56,154 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-11-07 00:49:56,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:49:56,159 INFO L225 Difference]: With dead ends: 122 [2020-11-07 00:49:56,160 INFO L226 Difference]: Without dead ends: 100 [2020-11-07 00:49:56,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:49:56,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-11-07 00:49:56,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 68. [2020-11-07 00:49:56,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-07 00:49:56,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-11-07 00:49:56,178 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 42 [2020-11-07 00:49:56,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:49:56,178 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-11-07 00:49:56,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 00:49:56,179 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-11-07 00:49:56,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 00:49:56,180 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:49:56,181 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:49:56,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 00:49:56,181 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:49:56,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:49:56,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1457672738, now seen corresponding path program 1 times [2020-11-07 00:49:56,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:49:56,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975995443] [2020-11-07 00:49:56,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:49:56,450 WARN L194 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-11-07 00:49:56,505 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:49:56,579 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:49:56,585 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:49:56,661 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:49:56,664 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-07 00:49:56,664 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-11-07 00:49:56,735 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:49:56,739 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:49:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:57,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:49:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:49:57,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975995443] [2020-11-07 00:49:57,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:49:57,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-11-07 00:49:57,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284348971] [2020-11-07 00:49:57,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 00:49:57,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:49:57,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 00:49:57,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-11-07 00:49:57,053 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 15 states. [2020-11-07 00:49:57,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:49:57,969 INFO L93 Difference]: Finished difference Result 163 states and 174 transitions. [2020-11-07 00:49:57,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 00:49:57,969 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-11-07 00:49:57,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:49:57,973 INFO L225 Difference]: With dead ends: 163 [2020-11-07 00:49:57,973 INFO L226 Difference]: Without dead ends: 148 [2020-11-07 00:49:57,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2020-11-07 00:49:57,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-11-07 00:49:58,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 84. [2020-11-07 00:49:58,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-07 00:49:58,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-11-07 00:49:58,006 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 47 [2020-11-07 00:49:58,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:49:58,007 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-11-07 00:49:58,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 00:49:58,007 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-11-07 00:49:58,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 00:49:58,015 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:49:58,016 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:49:58,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 00:49:58,016 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:49:58,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:49:58,017 INFO L82 PathProgramCache]: Analyzing trace with hash -213825236, now seen corresponding path program 1 times [2020-11-07 00:49:58,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:49:58,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987354348] [2020-11-07 00:49:58,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:49:58,269 WARN L194 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-11-07 00:49:58,291 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:49:58,368 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:49:58,374 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:49:58,438 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:49:58,440 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-07 00:49:58,440 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-11-07 00:49:58,514 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:49:58,517 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:49:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:58,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:49:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:49:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:49:58,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987354348] [2020-11-07 00:49:58,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:49:58,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-11-07 00:49:58,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870288361] [2020-11-07 00:49:58,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 00:49:58,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:49:58,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 00:49:58,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-11-07 00:49:58,857 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 15 states. [2020-11-07 00:50:00,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:50:00,044 INFO L93 Difference]: Finished difference Result 187 states and 201 transitions. [2020-11-07 00:50:00,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 00:50:00,045 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-11-07 00:50:00,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:50:00,047 INFO L225 Difference]: With dead ends: 187 [2020-11-07 00:50:00,047 INFO L226 Difference]: Without dead ends: 179 [2020-11-07 00:50:00,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2020-11-07 00:50:00,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-07 00:50:00,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 106. [2020-11-07 00:50:00,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-07 00:50:00,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2020-11-07 00:50:00,110 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 47 [2020-11-07 00:50:00,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:50:00,111 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2020-11-07 00:50:00,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 00:50:00,111 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2020-11-07 00:50:00,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-07 00:50:00,113 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:50:00,113 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:50:00,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 00:50:00,113 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:50:00,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:50:00,117 INFO L82 PathProgramCache]: Analyzing trace with hash -816306810, now seen corresponding path program 1 times [2020-11-07 00:50:00,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:50:00,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625868413] [2020-11-07 00:50:00,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:50:00,382 WARN L194 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-11-07 00:50:00,430 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:00,512 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:00,519 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:00,581 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:00,584 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:00,584 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-11-07 00:50:00,661 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:50:00,665 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:50:00,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:50:01,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:50:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:50:01,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:50:01,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625868413] [2020-11-07 00:50:01,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:50:01,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 00:50:01,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815267280] [2020-11-07 00:50:01,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 00:50:01,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:50:01,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 00:50:01,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-11-07 00:50:01,067 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand 16 states. [2020-11-07 00:50:02,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:50:02,325 INFO L93 Difference]: Finished difference Result 171 states and 184 transitions. [2020-11-07 00:50:02,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-07 00:50:02,325 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-11-07 00:50:02,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:50:02,327 INFO L225 Difference]: With dead ends: 171 [2020-11-07 00:50:02,327 INFO L226 Difference]: Without dead ends: 163 [2020-11-07 00:50:02,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-11-07 00:50:02,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-11-07 00:50:02,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 110. [2020-11-07 00:50:02,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-11-07 00:50:02,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2020-11-07 00:50:02,370 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 53 [2020-11-07 00:50:02,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:50:02,370 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2020-11-07 00:50:02,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 00:50:02,371 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2020-11-07 00:50:02,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-07 00:50:02,372 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:50:02,372 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:50:02,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 00:50:02,372 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:50:02,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:50:02,373 INFO L82 PathProgramCache]: Analyzing trace with hash 927043156, now seen corresponding path program 1 times [2020-11-07 00:50:02,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:50:02,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23156858] [2020-11-07 00:50:02,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:50:02,606 WARN L194 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-11-07 00:50:02,622 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:02,696 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:02,703 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:02,765 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:02,766 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:02,767 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-11-07 00:50:02,837 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:50:02,841 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:50:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:50:03,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:50:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:50:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:50:03,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23156858] [2020-11-07 00:50:03,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:50:03,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-11-07 00:50:03,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163923690] [2020-11-07 00:50:03,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 00:50:03,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:50:03,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 00:50:03,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-11-07 00:50:03,134 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand 15 states. [2020-11-07 00:50:04,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:50:04,122 INFO L93 Difference]: Finished difference Result 199 states and 214 transitions. [2020-11-07 00:50:04,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 00:50:04,124 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-11-07 00:50:04,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:50:04,126 INFO L225 Difference]: With dead ends: 199 [2020-11-07 00:50:04,127 INFO L226 Difference]: Without dead ends: 178 [2020-11-07 00:50:04,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2020-11-07 00:50:04,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-11-07 00:50:04,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 112. [2020-11-07 00:50:04,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-07 00:50:04,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2020-11-07 00:50:04,162 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 53 [2020-11-07 00:50:04,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:50:04,163 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2020-11-07 00:50:04,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 00:50:04,163 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2020-11-07 00:50:04,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-07 00:50:04,165 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:50:04,165 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:50:04,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 00:50:04,166 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:50:04,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:50:04,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1108269092, now seen corresponding path program 1 times [2020-11-07 00:50:04,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:50:04,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837342159] [2020-11-07 00:50:04,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:50:04,400 WARN L194 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-11-07 00:50:04,420 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:04,495 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:04,510 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:04,573 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:04,575 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:04,577 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-11-07 00:50:04,646 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:50:04,652 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:50:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:50:05,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:50:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:50:05,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:50:05,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837342159] [2020-11-07 00:50:05,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:50:05,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 00:50:05,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076874520] [2020-11-07 00:50:05,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 00:50:05,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:50:05,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 00:50:05,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-11-07 00:50:05,085 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand 16 states. [2020-11-07 00:50:06,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:50:06,420 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2020-11-07 00:50:06,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-07 00:50:06,421 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-11-07 00:50:06,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:50:06,423 INFO L225 Difference]: With dead ends: 175 [2020-11-07 00:50:06,423 INFO L226 Difference]: Without dead ends: 167 [2020-11-07 00:50:06,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-11-07 00:50:06,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-11-07 00:50:06,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 119. [2020-11-07 00:50:06,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-11-07 00:50:06,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2020-11-07 00:50:06,453 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 53 [2020-11-07 00:50:06,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:50:06,455 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2020-11-07 00:50:06,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 00:50:06,455 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2020-11-07 00:50:06,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-07 00:50:06,456 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:50:06,457 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:50:06,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 00:50:06,457 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:50:06,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:50:06,458 INFO L82 PathProgramCache]: Analyzing trace with hash 6311014, now seen corresponding path program 2 times [2020-11-07 00:50:06,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:50:06,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677720583] [2020-11-07 00:50:06,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:50:06,693 WARN L194 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-11-07 00:50:06,707 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:06,775 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:06,779 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:06,841 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:06,843 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:06,844 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-11-07 00:50:07,110 WARN L194 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-11-07 00:50:07,122 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:07,190 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:07,196 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:07,257 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:07,259 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:07,259 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-11-07 00:50:07,319 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:50:07,322 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:50:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:50:07,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:50:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:50:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:50:07,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677720583] [2020-11-07 00:50:07,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:50:07,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-11-07 00:50:07,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127278181] [2020-11-07 00:50:07,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 00:50:07,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:50:07,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 00:50:07,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-11-07 00:50:07,930 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand 22 states. [2020-11-07 00:50:10,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:50:10,118 INFO L93 Difference]: Finished difference Result 207 states and 222 transitions. [2020-11-07 00:50:10,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-07 00:50:10,119 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-11-07 00:50:10,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:50:10,121 INFO L225 Difference]: With dead ends: 207 [2020-11-07 00:50:10,121 INFO L226 Difference]: Without dead ends: 199 [2020-11-07 00:50:10,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=493, Invalid=2263, Unknown=0, NotChecked=0, Total=2756 [2020-11-07 00:50:10,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-07 00:50:10,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 144. [2020-11-07 00:50:10,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-11-07 00:50:10,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2020-11-07 00:50:10,149 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 58 [2020-11-07 00:50:10,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:50:10,149 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2020-11-07 00:50:10,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 00:50:10,149 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2020-11-07 00:50:10,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-07 00:50:10,150 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:50:10,150 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:50:10,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 00:50:10,151 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:50:10,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:50:10,151 INFO L82 PathProgramCache]: Analyzing trace with hash -107072424, now seen corresponding path program 1 times [2020-11-07 00:50:10,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:50:10,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091113849] [2020-11-07 00:50:10,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:50:10,362 WARN L194 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-11-07 00:50:10,374 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:10,442 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:10,447 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:10,510 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:10,512 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:10,512 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-11-07 00:50:10,582 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:50:10,585 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:50:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:50:11,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:50:11,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:50:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:50:11,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091113849] [2020-11-07 00:50:11,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:50:11,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-11-07 00:50:11,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858336515] [2020-11-07 00:50:11,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 00:50:11,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:50:11,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 00:50:11,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-11-07 00:50:11,201 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand 22 states. [2020-11-07 00:50:13,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:50:13,440 INFO L93 Difference]: Finished difference Result 244 states and 263 transitions. [2020-11-07 00:50:13,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-07 00:50:13,441 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-11-07 00:50:13,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:50:13,444 INFO L225 Difference]: With dead ends: 244 [2020-11-07 00:50:13,444 INFO L226 Difference]: Without dead ends: 236 [2020-11-07 00:50:13,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=459, Invalid=2193, Unknown=0, NotChecked=0, Total=2652 [2020-11-07 00:50:13,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-11-07 00:50:13,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 156. [2020-11-07 00:50:13,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-11-07 00:50:13,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 167 transitions. [2020-11-07 00:50:13,477 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 167 transitions. Word has length 58 [2020-11-07 00:50:13,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:50:13,477 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 167 transitions. [2020-11-07 00:50:13,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 00:50:13,477 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 167 transitions. [2020-11-07 00:50:13,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-07 00:50:13,478 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:50:13,478 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:50:13,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 00:50:13,479 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:50:13,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:50:13,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1632354514, now seen corresponding path program 2 times [2020-11-07 00:50:13,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:50:13,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271199311] [2020-11-07 00:50:13,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:50:13,695 WARN L194 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-11-07 00:50:13,722 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:13,797 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:13,804 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:13,867 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:13,869 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:13,869 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-11-07 00:50:13,938 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:50:13,941 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:50:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:50:14,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:50:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:50:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:50:14,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271199311] [2020-11-07 00:50:14,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:50:14,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 00:50:14,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553155789] [2020-11-07 00:50:14,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 00:50:14,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:50:14,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 00:50:14,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-11-07 00:50:14,312 INFO L87 Difference]: Start difference. First operand 156 states and 167 transitions. Second operand 16 states. [2020-11-07 00:50:15,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:50:15,557 INFO L93 Difference]: Finished difference Result 214 states and 230 transitions. [2020-11-07 00:50:15,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-07 00:50:15,559 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2020-11-07 00:50:15,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:50:15,561 INFO L225 Difference]: With dead ends: 214 [2020-11-07 00:50:15,561 INFO L226 Difference]: Without dead ends: 193 [2020-11-07 00:50:15,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-11-07 00:50:15,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-11-07 00:50:15,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 158. [2020-11-07 00:50:15,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-11-07 00:50:15,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 169 transitions. [2020-11-07 00:50:15,594 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 169 transitions. Word has length 59 [2020-11-07 00:50:15,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:50:15,594 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 169 transitions. [2020-11-07 00:50:15,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 00:50:15,594 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 169 transitions. [2020-11-07 00:50:15,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-07 00:50:15,595 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:50:15,595 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:50:15,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 00:50:15,595 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:50:15,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:50:15,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1451128578, now seen corresponding path program 1 times [2020-11-07 00:50:15,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:50:15,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537727471] [2020-11-07 00:50:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:50:15,802 WARN L194 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-11-07 00:50:15,815 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:15,886 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:15,891 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:15,958 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:15,959 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:15,960 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-11-07 00:50:16,028 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:50:16,031 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:50:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:50:16,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:50:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:50:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:50:16,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537727471] [2020-11-07 00:50:16,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:50:16,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 00:50:16,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843092205] [2020-11-07 00:50:16,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 00:50:16,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:50:16,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 00:50:16,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-11-07 00:50:16,375 INFO L87 Difference]: Start difference. First operand 158 states and 169 transitions. Second operand 16 states. [2020-11-07 00:50:17,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:50:17,555 INFO L93 Difference]: Finished difference Result 193 states and 206 transitions. [2020-11-07 00:50:17,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 00:50:17,556 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2020-11-07 00:50:17,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:50:17,558 INFO L225 Difference]: With dead ends: 193 [2020-11-07 00:50:17,558 INFO L226 Difference]: Without dead ends: 165 [2020-11-07 00:50:17,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2020-11-07 00:50:17,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-11-07 00:50:17,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 147. [2020-11-07 00:50:17,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-11-07 00:50:17,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 157 transitions. [2020-11-07 00:50:17,587 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 157 transitions. Word has length 59 [2020-11-07 00:50:17,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:50:17,587 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 157 transitions. [2020-11-07 00:50:17,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 00:50:17,588 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 157 transitions. [2020-11-07 00:50:17,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-07 00:50:17,588 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:50:17,589 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:50:17,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 00:50:17,589 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:50:17,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:50:17,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1996705052, now seen corresponding path program 2 times [2020-11-07 00:50:17,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:50:17,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520219213] [2020-11-07 00:50:17,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:50:17,812 WARN L194 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-11-07 00:50:17,827 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:17,902 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:17,907 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:17,972 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:17,974 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:17,974 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-11-07 00:50:18,046 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:50:18,050 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:50:18,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:50:18,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:50:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:50:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:50:18,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520219213] [2020-11-07 00:50:18,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:50:18,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 00:50:18,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842127713] [2020-11-07 00:50:18,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 00:50:18,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:50:18,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 00:50:18,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-11-07 00:50:18,395 INFO L87 Difference]: Start difference. First operand 147 states and 157 transitions. Second operand 16 states. [2020-11-07 00:50:19,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:50:19,666 INFO L93 Difference]: Finished difference Result 187 states and 199 transitions. [2020-11-07 00:50:19,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 00:50:19,666 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2020-11-07 00:50:19,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:50:19,668 INFO L225 Difference]: With dead ends: 187 [2020-11-07 00:50:19,669 INFO L226 Difference]: Without dead ends: 159 [2020-11-07 00:50:19,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2020-11-07 00:50:19,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-11-07 00:50:19,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 135. [2020-11-07 00:50:19,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-11-07 00:50:19,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 144 transitions. [2020-11-07 00:50:19,694 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 144 transitions. Word has length 59 [2020-11-07 00:50:19,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:50:19,695 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 144 transitions. [2020-11-07 00:50:19,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 00:50:19,695 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 144 transitions. [2020-11-07 00:50:19,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-07 00:50:19,695 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:50:19,696 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:50:19,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 00:50:19,696 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:50:19,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:50:19,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1610333710, now seen corresponding path program 3 times [2020-11-07 00:50:19,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:50:19,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042815686] [2020-11-07 00:50:19,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:50:19,901 WARN L194 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-11-07 00:50:19,912 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:19,978 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:19,985 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:20,047 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:20,049 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:20,050 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-11-07 00:50:20,305 WARN L194 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-11-07 00:50:20,316 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:20,383 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:20,389 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:20,448 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:20,450 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:20,450 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-11-07 00:50:20,507 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:50:20,510 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:50:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:50:21,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:50:21,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:50:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:50:21,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042815686] [2020-11-07 00:50:21,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:50:21,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-11-07 00:50:21,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541574449] [2020-11-07 00:50:21,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 00:50:21,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:50:21,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 00:50:21,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-11-07 00:50:21,328 INFO L87 Difference]: Start difference. First operand 135 states and 144 transitions. Second operand 24 states. [2020-11-07 00:50:22,809 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-11-07 00:50:24,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:50:24,564 INFO L93 Difference]: Finished difference Result 210 states and 225 transitions. [2020-11-07 00:50:24,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 00:50:24,565 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 64 [2020-11-07 00:50:24,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:50:24,567 INFO L225 Difference]: With dead ends: 210 [2020-11-07 00:50:24,567 INFO L226 Difference]: Without dead ends: 195 [2020-11-07 00:50:24,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=451, Invalid=2629, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 00:50:24,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-11-07 00:50:24,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 146. [2020-11-07 00:50:24,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-11-07 00:50:24,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 156 transitions. [2020-11-07 00:50:24,594 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 156 transitions. Word has length 64 [2020-11-07 00:50:24,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:50:24,594 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 156 transitions. [2020-11-07 00:50:24,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 00:50:24,594 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 156 transitions. [2020-11-07 00:50:24,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-07 00:50:24,595 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:50:24,595 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:50:24,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 00:50:24,595 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:50:24,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:50:24,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1791559646, now seen corresponding path program 1 times [2020-11-07 00:50:24,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:50:24,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441993508] [2020-11-07 00:50:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:50:24,800 WARN L194 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-11-07 00:50:24,822 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:24,889 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:24,894 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:24,956 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:24,958 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:24,958 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-11-07 00:50:25,234 WARN L194 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-11-07 00:50:25,244 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:25,311 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:25,316 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:25,384 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:25,385 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:25,385 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-11-07 00:50:25,448 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:50:25,451 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:50:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:50:26,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:50:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:50:26,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:50:26,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441993508] [2020-11-07 00:50:26,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:50:26,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-11-07 00:50:26,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080807956] [2020-11-07 00:50:26,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 00:50:26,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:50:26,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 00:50:26,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-11-07 00:50:26,025 INFO L87 Difference]: Start difference. First operand 146 states and 156 transitions. Second operand 22 states. [2020-11-07 00:50:28,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:50:28,164 INFO L93 Difference]: Finished difference Result 222 states and 238 transitions. [2020-11-07 00:50:28,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 00:50:28,164 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2020-11-07 00:50:28,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:50:28,166 INFO L225 Difference]: With dead ends: 222 [2020-11-07 00:50:28,166 INFO L226 Difference]: Without dead ends: 205 [2020-11-07 00:50:28,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2020-11-07 00:50:28,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-11-07 00:50:28,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 160. [2020-11-07 00:50:28,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-11-07 00:50:28,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 170 transitions. [2020-11-07 00:50:28,205 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 170 transitions. Word has length 64 [2020-11-07 00:50:28,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:50:28,205 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 170 transitions. [2020-11-07 00:50:28,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 00:50:28,206 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 170 transitions. [2020-11-07 00:50:28,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-07 00:50:28,207 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:50:28,207 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:50:28,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 00:50:28,207 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:50:28,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:50:28,208 INFO L82 PathProgramCache]: Analyzing trace with hash 2022992000, now seen corresponding path program 1 times [2020-11-07 00:50:28,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:50:28,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580157987] [2020-11-07 00:50:28,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:50:28,428 WARN L194 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-11-07 00:50:28,438 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:28,510 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:28,516 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:28,585 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:28,586 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:28,587 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-11-07 00:50:28,649 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:50:28,652 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:50:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:50:29,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:50:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:50:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:50:29,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580157987] [2020-11-07 00:50:29,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:50:29,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-11-07 00:50:29,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692267235] [2020-11-07 00:50:29,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 00:50:29,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:50:29,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 00:50:29,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-11-07 00:50:29,104 INFO L87 Difference]: Start difference. First operand 160 states and 170 transitions. Second operand 20 states. [2020-11-07 00:50:30,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:50:30,812 INFO L93 Difference]: Finished difference Result 227 states and 242 transitions. [2020-11-07 00:50:30,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 00:50:30,812 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 64 [2020-11-07 00:50:30,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:50:30,814 INFO L225 Difference]: With dead ends: 227 [2020-11-07 00:50:30,814 INFO L226 Difference]: Without dead ends: 206 [2020-11-07 00:50:30,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=316, Invalid=1324, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 00:50:30,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-11-07 00:50:30,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 160. [2020-11-07 00:50:30,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-11-07 00:50:30,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 169 transitions. [2020-11-07 00:50:30,842 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 169 transitions. Word has length 64 [2020-11-07 00:50:30,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:50:30,842 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 169 transitions. [2020-11-07 00:50:30,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 00:50:30,842 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 169 transitions. [2020-11-07 00:50:30,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-07 00:50:30,843 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:50:30,843 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:50:30,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 00:50:30,843 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:50:30,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:50:30,843 INFO L82 PathProgramCache]: Analyzing trace with hash -2090749360, now seen corresponding path program 1 times [2020-11-07 00:50:30,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:50:30,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745335581] [2020-11-07 00:50:30,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:50:31,056 WARN L194 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-11-07 00:50:31,070 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:31,140 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:31,146 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:31,211 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-07 00:50:31,213 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-07 00:50:31,214 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:142, output treesize:118 [2020-11-07 00:50:31,281 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:50:31,284 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:50:31,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:50:31,302 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:50:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:50:31,322 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:50:31,373 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 00:50:31,373 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 00:50:31,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 00:50:31,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:50:31 BoogieIcfgContainer [2020-11-07 00:50:31,397 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 00:50:31,398 INFO L168 Benchmark]: Toolchain (without parser) took 39342.76 ms. Allocated memory was 166.7 MB in the beginning and 373.3 MB in the end (delta: 206.6 MB). Free memory was 142.4 MB in the beginning and 312.4 MB in the end (delta: -170.0 MB). Peak memory consumption was 37.9 MB. Max. memory is 8.0 GB. [2020-11-07 00:50:31,399 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 166.7 MB. Free memory is still 141.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:50:31,402 INFO L168 Benchmark]: CACSL2BoogieTranslator took 551.83 ms. Allocated memory is still 166.7 MB. Free memory was 141.7 MB in the beginning and 120.2 MB in the end (delta: 21.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-11-07 00:50:31,406 INFO L168 Benchmark]: Boogie Preprocessor took 119.13 ms. Allocated memory is still 166.7 MB. Free memory was 120.1 MB in the beginning and 148.9 MB in the end (delta: -28.8 MB). Peak memory consumption was 5.8 MB. Max. memory is 8.0 GB. [2020-11-07 00:50:31,407 INFO L168 Benchmark]: RCFGBuilder took 841.71 ms. Allocated memory is still 166.7 MB. Free memory was 148.9 MB in the beginning and 102.2 MB in the end (delta: 46.7 MB). Peak memory consumption was 47.2 MB. Max. memory is 8.0 GB. [2020-11-07 00:50:31,407 INFO L168 Benchmark]: TraceAbstraction took 37810.12 ms. Allocated memory was 166.7 MB in the beginning and 373.3 MB in the end (delta: 206.6 MB). Free memory was 102.2 MB in the beginning and 312.4 MB in the end (delta: -210.1 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:50:31,413 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 166.7 MB. Free memory is still 141.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 551.83 ms. Allocated memory is still 166.7 MB. Free memory was 141.7 MB in the beginning and 120.2 MB in the end (delta: 21.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 119.13 ms. Allocated memory is still 166.7 MB. Free memory was 120.1 MB in the beginning and 148.9 MB in the end (delta: -28.8 MB). Peak memory consumption was 5.8 MB. Max. memory is 8.0 GB. * RCFGBuilder took 841.71 ms. Allocated memory is still 166.7 MB. Free memory was 148.9 MB in the beginning and 102.2 MB in the end (delta: 46.7 MB). Peak memory consumption was 47.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 37810.12 ms. Allocated memory was 166.7 MB in the beginning and 373.3 MB in the end (delta: 206.6 MB). Free memory was 102.2 MB in the beginning and 312.4 MB in the end (delta: -210.1 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] COND TRUE __VERIFIER_nondet_int() [L537] p->h = 1 [L538] t = (List) malloc(sizeof(struct node)) [L539] COND FALSE !(t == 0) [L540] p->n = t [L541] EXPR p->n [L541] p = p->n [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] COND TRUE __VERIFIER_nondet_int() [L544] p->h = 2 [L545] t = (List) malloc(sizeof(struct node)) [L546] COND FALSE !(t == 0) [L547] p->n = t [L548] EXPR p->n [L548] p = p->n [L543] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 [L551] p = a [L552] EXPR p->h [L552] COND FALSE !(p->h == 2) [L554] EXPR p->h [L554] COND TRUE p->h == 1 [L555] EXPR p->n [L555] p = p->n [L554] EXPR p->h [L554] COND FALSE !(p->h == 1) [L556] EXPR p->h [L556] COND TRUE p->h != 3 [L557] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "list-2.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 101 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 37.7s, OverallIterations: 18, TraceHistogramMax: 3, AutomataDifference: 22.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1082 SDtfs, 4338 SDslu, 8617 SDs, 0 SdLazy, 8252 SolverSat, 776 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 555 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 500 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3043 ImplicationChecksByTransitivity, 16.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=160occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 17 MinimizatonAttempts, 790 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...