/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:16:15,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:16:15,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:16:15,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:16:15,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:16:15,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:16:15,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:16:16,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:16:16,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:16:16,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:16:16,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:16:16,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:16:16,015 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:16:16,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:16:16,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:16:16,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:16:16,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:16:16,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:16:16,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:16:16,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:16:16,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:16:16,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:16:16,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:16:16,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:16:16,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-07 11:16:16,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-07 11:16:16,042 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-07 11:16:16,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-07 11:16:16,044 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-07 11:16:16,046 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-07 11:16:16,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 11:16:16,047 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 11:16:16,048 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 11:16:16,049 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 11:16:16,050 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 11:16:16,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 11:16:16,051 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 11:16:16,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 11:16:16,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:16:16,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:16:16,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:16:16,055 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 11:16:16,090 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:16:16,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:16:16,094 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:16:16,094 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:16:16,094 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:16:16,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:16:16,095 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:16:16,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:16:16,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:16:16,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:16:16,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:16:16,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:16:16,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:16:16,096 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:16:16,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:16:16,098 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:16:16,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:16:16,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:16:16,099 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:16:16,099 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:16:16,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:16:16,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:16:16,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:16:16,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:16:16,100 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:16:16,100 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:16:16,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:16:16,100 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:16:16,101 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:16:16,101 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:16:16,371 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:16:16,385 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:16:16,389 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:16:16,390 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:16:16,391 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:16:16,391 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-07-07 11:16:16,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e528f4ce3/a096e90350eb4a2caa54eafb8b692a74/FLAGae19d657a [2020-07-07 11:16:16,927 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:16:16,927 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list-2.i [2020-07-07 11:16:16,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e528f4ce3/a096e90350eb4a2caa54eafb8b692a74/FLAGae19d657a [2020-07-07 11:16:17,243 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e528f4ce3/a096e90350eb4a2caa54eafb8b692a74 [2020-07-07 11:16:17,254 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:16:17,256 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:16:17,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:16:17,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:16:17,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:16:17,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:16:17" (1/1) ... [2020-07-07 11:16:17,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a10f7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:17, skipping insertion in model container [2020-07-07 11:16:17,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:16:17" (1/1) ... [2020-07-07 11:16:17,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:16:17,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:16:17,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:16:17,714 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:16:17,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:16:17,838 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:16:17,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:17 WrapperNode [2020-07-07 11:16:17,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:16:17,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:16:17,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:16:17,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:16:17,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:17" (1/1) ... [2020-07-07 11:16:17,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:17" (1/1) ... [2020-07-07 11:16:17,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:17" (1/1) ... [2020-07-07 11:16:17,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:17" (1/1) ... [2020-07-07 11:16:17,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:17" (1/1) ... [2020-07-07 11:16:17,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:17" (1/1) ... [2020-07-07 11:16:17,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:17" (1/1) ... [2020-07-07 11:16:17,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:16:17,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:16:17,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:16:17,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:16:17,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:17" (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 [2020-07-07 11:16:17,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:16:17,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:16:17,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-07 11:16:17,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-07 11:16:17,973 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-07 11:16:17,973 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-07 11:16:17,973 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-07 11:16:17,974 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-07 11:16:17,974 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:16:17,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:16:17,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:16:17,975 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-07 11:16:17,975 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-07 11:16:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-07 11:16:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-07 11:16:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-07 11:16:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-07 11:16:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-07 11:16:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-07 11:16:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-07 11:16:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-07 11:16:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-07 11:16:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-07 11:16:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-07 11:16:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-07 11:16:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-07 11:16:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-07 11:16:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-07 11:16:17,980 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-07 11:16:17,980 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-07 11:16:17,980 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-07 11:16:17,980 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-07 11:16:17,980 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-07 11:16:17,980 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-07 11:16:17,981 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-07 11:16:17,981 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-07 11:16:17,981 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-07 11:16:17,981 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-07 11:16:17,981 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-07 11:16:17,981 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-07 11:16:17,982 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-07 11:16:17,982 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-07 11:16:17,982 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-07 11:16:17,982 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-07 11:16:17,982 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-07 11:16:17,983 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-07 11:16:17,983 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-07 11:16:17,983 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-07 11:16:17,983 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-07 11:16:17,983 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-07 11:16:17,983 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-07 11:16:17,984 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-07 11:16:17,984 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-07 11:16:17,985 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-07 11:16:17,985 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-07 11:16:17,985 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-07 11:16:17,985 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-07 11:16:17,985 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-07 11:16:17,985 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-07 11:16:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-07 11:16:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-07 11:16:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-07 11:16:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-07 11:16:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-07 11:16:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-07 11:16:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-07 11:16:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-07 11:16:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-07 11:16:17,989 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-07 11:16:17,989 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-07 11:16:17,989 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-07 11:16:17,989 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-07 11:16:17,989 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-07 11:16:17,990 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-07 11:16:17,990 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 11:16:17,990 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-07 11:16:17,990 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-07 11:16:17,990 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-07 11:16:17,990 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-07 11:16:17,990 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-07 11:16:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-07 11:16:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-07 11:16:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-07 11:16:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-07 11:16:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-07 11:16:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-07 11:16:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-07 11:16:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-07 11:16:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-07 11:16:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-07 11:16:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-07 11:16:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-07 11:16:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-07 11:16:17,993 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-07 11:16:17,993 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-07 11:16:17,993 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-07 11:16:17,993 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-07 11:16:17,993 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-07 11:16:17,993 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-07 11:16:17,993 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-07 11:16:17,994 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-07 11:16:17,994 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-07 11:16:17,994 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-07 11:16:17,994 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-07 11:16:17,994 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-07 11:16:17,994 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-07 11:16:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-07 11:16:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-07 11:16:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-07 11:16:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-07 11:16:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-07 11:16:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-07 11:16:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-07 11:16:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-07 11:16:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-07 11:16:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-07 11:16:17,996 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-07 11:16:17,996 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-07 11:16:17,996 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-07 11:16:17,996 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:16:17,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-07 11:16:17,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 11:16:17,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-07 11:16:17,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-07 11:16:17,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 11:16:17,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:16:17,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:16:17,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 11:16:18,373 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-07 11:16:18,508 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:16:18,508 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-07 11:16:18,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:16:18 BoogieIcfgContainer [2020-07-07 11:16:18,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:16:18,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:16:18,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:16:18,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:16:18,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:16:17" (1/3) ... [2020-07-07 11:16:18,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad189a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:16:18, skipping insertion in model container [2020-07-07 11:16:18,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:17" (2/3) ... [2020-07-07 11:16:18,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad189a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:16:18, skipping insertion in model container [2020-07-07 11:16:18,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:16:18" (3/3) ... [2020-07-07 11:16:18,520 INFO L109 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-07-07 11:16:18,531 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:16:18,539 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:16:18,553 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:16:18,575 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:16:18,575 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:16:18,575 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:16:18,576 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:16:18,576 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:16:18,576 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:16:18,576 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:16:18,577 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:16:18,594 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-07 11:16:18,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-07 11:16:18,601 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:16:18,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:16:18,602 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:16:18,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:16:18,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1613857984, now seen corresponding path program 1 times [2020-07-07 11:16:18,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:16:18,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491408810] [2020-07-07 11:16:18,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:16:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:16:18,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491408810] [2020-07-07 11:16:18,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:16:18,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:16:18,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438784966] [2020-07-07 11:16:18,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:16:18,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:16:18,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:16:18,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:16:18,834 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-07-07 11:16:18,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:16:18,936 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-07-07 11:16:18,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:16:18,938 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-07 11:16:18,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:16:18,947 INFO L225 Difference]: With dead ends: 56 [2020-07-07 11:16:18,947 INFO L226 Difference]: Without dead ends: 25 [2020-07-07 11:16:18,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:16:18,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-07 11:16:18,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-07 11:16:18,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-07 11:16:18,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-07-07 11:16:18,985 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2020-07-07 11:16:18,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:16:18,985 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-07-07 11:16:18,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:16:18,986 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-07-07 11:16:18,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-07 11:16:18,987 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:16:18,987 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] [2020-07-07 11:16:18,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:16:18,988 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:16:18,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:16:18,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1642379272, now seen corresponding path program 1 times [2020-07-07 11:16:18,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:16:18,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595129779] [2020-07-07 11:16:18,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:16:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:16:19,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595129779] [2020-07-07 11:16:19,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:16:19,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 11:16:19,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135859256] [2020-07-07 11:16:19,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:16:19,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:16:19,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:16:19,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:16:19,140 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2020-07-07 11:16:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:16:19,270 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-07-07 11:16:19,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:16:19,271 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-07 11:16:19,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:16:19,274 INFO L225 Difference]: With dead ends: 50 [2020-07-07 11:16:19,274 INFO L226 Difference]: Without dead ends: 46 [2020-07-07 11:16:19,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:16:19,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-07 11:16:19,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2020-07-07 11:16:19,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-07 11:16:19,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-07-07 11:16:19,284 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 20 [2020-07-07 11:16:19,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:16:19,284 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-07-07 11:16:19,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:16:19,285 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-07-07 11:16:19,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 11:16:19,286 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:16:19,286 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] [2020-07-07 11:16:19,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:16:19,286 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:16:19,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:16:19,287 INFO L82 PathProgramCache]: Analyzing trace with hash -2024806125, now seen corresponding path program 1 times [2020-07-07 11:16:19,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:16:19,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144686464] [2020-07-07 11:16:19,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:16:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:16:19,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144686464] [2020-07-07 11:16:19,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:16:19,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 11:16:19,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669209993] [2020-07-07 11:16:19,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:16:19,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:16:19,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:16:19,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:16:19,407 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2020-07-07 11:16:19,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:16:19,528 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-07-07 11:16:19,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:16:19,528 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-07-07 11:16:19,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:16:19,529 INFO L225 Difference]: With dead ends: 52 [2020-07-07 11:16:19,530 INFO L226 Difference]: Without dead ends: 44 [2020-07-07 11:16:19,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:16:19,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-07 11:16:19,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-07-07 11:16:19,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-07 11:16:19,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-07-07 11:16:19,537 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2020-07-07 11:16:19,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:16:19,537 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-07-07 11:16:19,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:16:19,538 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-07-07 11:16:19,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 11:16:19,538 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:16:19,539 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] [2020-07-07 11:16:19,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 11:16:19,539 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:16:19,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:16:19,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1000103149, now seen corresponding path program 1 times [2020-07-07 11:16:19,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:16:19,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995598950] [2020-07-07 11:16:19,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:16:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:16:19,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995598950] [2020-07-07 11:16:19,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:16:19,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 11:16:19,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513016955] [2020-07-07 11:16:19,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:16:19,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:16:19,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:16:19,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:16:19,647 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 6 states. [2020-07-07 11:16:19,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:16:19,771 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-07-07 11:16:19,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:16:19,773 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-07-07 11:16:19,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:16:19,774 INFO L225 Difference]: With dead ends: 52 [2020-07-07 11:16:19,774 INFO L226 Difference]: Without dead ends: 41 [2020-07-07 11:16:19,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:16:19,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-07 11:16:19,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-07-07 11:16:19,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-07 11:16:19,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-07-07 11:16:19,785 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2020-07-07 11:16:19,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:16:19,785 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-07-07 11:16:19,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:16:19,785 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-07-07 11:16:19,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-07 11:16:19,787 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:16:19,787 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] [2020-07-07 11:16:19,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 11:16:19,787 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:16:19,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:16:19,788 INFO L82 PathProgramCache]: Analyzing trace with hash 422878047, now seen corresponding path program 1 times [2020-07-07 11:16:19,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:16:19,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756315659] [2020-07-07 11:16:19,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:16:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:16:19,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756315659] [2020-07-07 11:16:19,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115438273] [2020-07-07 11:16:19,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:16:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:20,086 INFO L264 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-07 11:16:20,094 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:16:20,165 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-07 11:16:20,166 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:20,175 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:20,175 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:20,176 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-07 11:16:20,254 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:20,254 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-07 11:16:20,256 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:20,265 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:20,271 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-07 11:16:20,271 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:20,281 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:20,281 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:20,281 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2020-07-07 11:16:20,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:16:20,320 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-07-07 11:16:20,321 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:20,327 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:20,328 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:20,328 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:15 [2020-07-07 11:16:20,359 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-07-07 11:16:20,360 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:20,369 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:20,371 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-07 11:16:20,372 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:22 [2020-07-07 11:16:20,412 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2020-07-07 11:16:20,413 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:20,417 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:20,417 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:20,418 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:26, output treesize:3 [2020-07-07 11:16:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:16:20,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:16:20,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-07-07 11:16:20,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767015423] [2020-07-07 11:16:20,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 11:16:20,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:16:20,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 11:16:20,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:16:20,424 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 14 states. [2020-07-07 11:16:20,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:16:20,746 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-07-07 11:16:20,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 11:16:20,749 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-07-07 11:16:20,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:16:20,750 INFO L225 Difference]: With dead ends: 54 [2020-07-07 11:16:20,752 INFO L226 Difference]: Without dead ends: 48 [2020-07-07 11:16:20,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:16:20,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-07 11:16:20,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-07 11:16:20,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-07 11:16:20,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-07-07 11:16:20,764 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 24 [2020-07-07 11:16:20,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:16:20,766 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-07-07 11:16:20,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 11:16:20,766 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-07-07 11:16:20,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-07 11:16:20,767 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:16:20,767 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] [2020-07-07 11:16:20,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:16:20,982 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:16:20,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:16:20,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1286279711, now seen corresponding path program 1 times [2020-07-07 11:16:20,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:16:20,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330074209] [2020-07-07 11:16:20,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:16:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:21,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:16:21,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330074209] [2020-07-07 11:16:21,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348629331] [2020-07-07 11:16:21,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:16:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:21,199 INFO L264 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-07 11:16:21,205 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:16:21,214 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-07 11:16:21,214 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:21,224 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:21,224 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:21,224 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-07 11:16:21,269 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:21,270 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-07 11:16:21,270 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:21,279 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:21,284 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-07 11:16:21,285 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:21,310 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:21,311 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:21,311 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2020-07-07 11:16:21,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:16:21,356 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-07-07 11:16:21,356 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:21,362 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:21,363 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:21,363 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:15 [2020-07-07 11:16:21,395 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-07-07 11:16:21,396 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:21,411 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:21,413 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-07 11:16:21,414 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:22 [2020-07-07 11:16:21,477 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2020-07-07 11:16:21,478 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:21,482 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:21,483 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:21,483 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:26, output treesize:3 [2020-07-07 11:16:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:16:21,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:16:21,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-07-07 11:16:21,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006786267] [2020-07-07 11:16:21,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 11:16:21,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:16:21,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 11:16:21,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:16:21,489 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 14 states. [2020-07-07 11:16:21,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:16:21,873 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-07-07 11:16:21,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 11:16:21,873 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-07-07 11:16:21,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:16:21,874 INFO L225 Difference]: With dead ends: 63 [2020-07-07 11:16:21,875 INFO L226 Difference]: Without dead ends: 59 [2020-07-07 11:16:21,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:16:21,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-07 11:16:21,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2020-07-07 11:16:21,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-07 11:16:21,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-07-07 11:16:21,888 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 24 [2020-07-07 11:16:21,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:16:21,889 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-07-07 11:16:21,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 11:16:21,889 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-07-07 11:16:21,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-07 11:16:21,890 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:16:21,890 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] [2020-07-07 11:16:22,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:16:22,091 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:16:22,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:16:22,092 INFO L82 PathProgramCache]: Analyzing trace with hash -562710342, now seen corresponding path program 1 times [2020-07-07 11:16:22,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:16:22,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790217508] [2020-07-07 11:16:22,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:16:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:22,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:16:22,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790217508] [2020-07-07 11:16:22,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589301302] [2020-07-07 11:16:22,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:16:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:22,389 INFO L264 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-07 11:16:22,391 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:16:22,399 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-07 11:16:22,399 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:22,402 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:22,403 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:22,403 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-07 11:16:22,421 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:22,421 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-07 11:16:22,422 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:22,433 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:22,434 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:22,434 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:14 [2020-07-07 11:16:22,460 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-07 11:16:22,461 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:22,474 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:22,481 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-07 11:16:22,482 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:22,492 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:22,494 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:22,494 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:26 [2020-07-07 11:16:22,507 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_int_22|], 2=[|v_#memory_$Pointer$.base_18|, |v_#memory_$Pointer$.offset_16|]} [2020-07-07 11:16:22,511 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2020-07-07 11:16:22,512 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:22,523 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:22,544 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:22,545 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 108 [2020-07-07 11:16:22,548 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 3, 2, 1] term [2020-07-07 11:16:22,548 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-07 11:16:22,549 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:22,571 INFO L624 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2020-07-07 11:16:22,574 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2020-07-07 11:16:22,575 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:22,580 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:22,581 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:22,581 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:105, output treesize:27 [2020-07-07 11:16:22,607 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2020-07-07 11:16:22,608 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:22,614 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:22,616 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2020-07-07 11:16:22,617 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:22,626 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:22,627 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:22,627 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:7 [2020-07-07 11:16:22,632 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-07 11:16:22,632 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:22,634 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:22,634 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:22,635 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-07 11:16:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:16:22,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:16:22,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-07-07 11:16:22,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767837907] [2020-07-07 11:16:22,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:16:22,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:16:22,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:16:22,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:16:22,639 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 11 states. [2020-07-07 11:16:22,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:16:22,947 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-07-07 11:16:22,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 11:16:22,951 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-07-07 11:16:22,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:16:22,952 INFO L225 Difference]: With dead ends: 67 [2020-07-07 11:16:22,953 INFO L226 Difference]: Without dead ends: 63 [2020-07-07 11:16:22,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-07-07 11:16:22,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-07 11:16:22,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-07-07 11:16:22,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-07 11:16:22,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-07-07 11:16:22,962 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 26 [2020-07-07 11:16:22,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:16:22,963 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-07-07 11:16:22,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:16:22,963 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-07-07 11:16:22,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-07 11:16:22,964 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:16:22,964 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] [2020-07-07 11:16:23,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:16:23,171 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:16:23,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:16:23,172 INFO L82 PathProgramCache]: Analyzing trace with hash 449917269, now seen corresponding path program 1 times [2020-07-07 11:16:23,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:16:23,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961853992] [2020-07-07 11:16:23,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:16:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:16:23,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961853992] [2020-07-07 11:16:23,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164200565] [2020-07-07 11:16:23,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:16:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:23,436 INFO L264 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-07 11:16:23,440 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:16:23,448 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-07 11:16:23,448 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:23,453 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:23,453 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:23,453 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-07 11:16:23,480 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:23,481 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-07 11:16:23,481 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:23,491 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:23,491 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:23,492 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:14 [2020-07-07 11:16:23,503 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-07 11:16:23,504 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:23,517 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:23,523 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-07 11:16:23,524 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:23,537 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:23,538 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:23,540 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:26 [2020-07-07 11:16:23,556 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_int_23|], 2=[|v_#memory_$Pointer$.offset_18|, |v_#memory_$Pointer$.base_20|]} [2020-07-07 11:16:23,562 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2020-07-07 11:16:23,562 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:23,575 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:23,578 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2020-07-07 11:16:23,580 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:23,589 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:23,607 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:23,608 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 85 [2020-07-07 11:16:23,610 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 3, 2, 1] term [2020-07-07 11:16:23,610 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 11:16:23,611 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:23,625 INFO L624 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2020-07-07 11:16:23,626 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:23,626 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:105, output treesize:27 [2020-07-07 11:16:23,659 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2020-07-07 11:16:23,660 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:23,666 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:23,669 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2020-07-07 11:16:23,670 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:23,677 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:23,678 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:23,679 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:7 [2020-07-07 11:16:23,683 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-07 11:16:23,683 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:23,685 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:23,685 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:23,686 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-07 11:16:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:16:23,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:16:23,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2020-07-07 11:16:23,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927328769] [2020-07-07 11:16:23,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 11:16:23,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:16:23,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 11:16:23,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-07-07 11:16:23,723 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 12 states. [2020-07-07 11:16:24,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:16:24,038 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2020-07-07 11:16:24,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 11:16:24,038 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-07-07 11:16:24,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:16:24,040 INFO L225 Difference]: With dead ends: 69 [2020-07-07 11:16:24,040 INFO L226 Difference]: Without dead ends: 59 [2020-07-07 11:16:24,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:16:24,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-07 11:16:24,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-07-07 11:16:24,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 11:16:24,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-07-07 11:16:24,050 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 28 [2020-07-07 11:16:24,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:16:24,050 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-07-07 11:16:24,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 11:16:24,050 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-07-07 11:16:24,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-07 11:16:24,051 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:16:24,051 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:16:24,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:16:24,256 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:16:24,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:16:24,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1474620245, now seen corresponding path program 2 times [2020-07-07 11:16:24,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:16:24,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384785800] [2020-07-07 11:16:24,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:16:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:24,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:16:24,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384785800] [2020-07-07 11:16:24,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726752499] [2020-07-07 11:16:24,392 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:16:24,496 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:16:24,496 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:16:24,497 INFO L264 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-07 11:16:24,500 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:16:24,510 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-07 11:16:24,511 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:24,517 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:24,518 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:24,518 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-07 11:16:24,531 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:24,531 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-07 11:16:24,532 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:24,538 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:24,539 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:24,539 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:14 [2020-07-07 11:16:24,547 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-07 11:16:24,548 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:24,558 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:24,562 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-07 11:16:24,562 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:24,573 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:24,574 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:24,574 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:26 [2020-07-07 11:16:24,587 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_int_24|], 2=[|v_#memory_$Pointer$.base_22|, |v_#memory_$Pointer$.offset_20|]} [2020-07-07 11:16:24,591 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2020-07-07 11:16:24,591 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:24,605 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:24,623 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:24,624 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 108 [2020-07-07 11:16:24,625 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 3, 2, 1] term [2020-07-07 11:16:24,626 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-07 11:16:24,627 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:24,646 INFO L624 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2020-07-07 11:16:24,649 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2020-07-07 11:16:24,650 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:24,656 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:24,657 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:24,657 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:105, output treesize:27 [2020-07-07 11:16:24,682 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2020-07-07 11:16:24,683 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:24,689 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:24,692 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2020-07-07 11:16:24,693 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:24,698 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:24,699 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:24,699 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:7 [2020-07-07 11:16:24,704 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-07 11:16:24,704 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:24,706 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:24,706 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:24,706 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-07 11:16:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:16:24,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:16:24,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2020-07-07 11:16:24,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415949506] [2020-07-07 11:16:24,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 11:16:24,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:16:24,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 11:16:24,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-07-07 11:16:24,722 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 12 states. [2020-07-07 11:16:25,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:16:25,028 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-07-07 11:16:25,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 11:16:25,028 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-07-07 11:16:25,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:16:25,030 INFO L225 Difference]: With dead ends: 62 [2020-07-07 11:16:25,030 INFO L226 Difference]: Without dead ends: 49 [2020-07-07 11:16:25,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:16:25,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-07 11:16:25,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2020-07-07 11:16:25,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-07 11:16:25,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-07-07 11:16:25,036 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 28 [2020-07-07 11:16:25,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:16:25,036 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-07-07 11:16:25,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 11:16:25,036 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-07-07 11:16:25,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-07 11:16:25,037 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:16:25,037 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:16:25,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:16:25,245 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:16:25,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:16:25,246 INFO L82 PathProgramCache]: Analyzing trace with hash -149429434, now seen corresponding path program 2 times [2020-07-07 11:16:25,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:16:25,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554524985] [2020-07-07 11:16:25,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:16:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:25,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:16:25,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554524985] [2020-07-07 11:16:25,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727402996] [2020-07-07 11:16:25,428 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:16:25,518 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:16:25,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:16:25,520 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-07 11:16:25,524 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:16:25,540 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-07 11:16:25,541 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:25,545 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:25,545 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:25,546 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-07 11:16:25,588 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:25,589 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-07-07 11:16:25,590 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:25,617 INFO L624 ElimStorePlain]: treesize reduction 14, result has 71.4 percent of original size [2020-07-07 11:16:25,623 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-07 11:16:25,624 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:25,635 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:25,635 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:25,635 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:31 [2020-07-07 11:16:25,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:16:25,673 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-07-07 11:16:25,673 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:25,682 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:25,682 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:25,682 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:25 [2020-07-07 11:16:25,720 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:25,721 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2020-07-07 11:16:25,721 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:25,733 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:25,737 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-07-07 11:16:25,738 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:25,748 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:25,748 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:25,749 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:30 [2020-07-07 11:16:25,791 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 1] term [2020-07-07 11:16:25,791 INFO L501 QuantifierPusher]: Distributing 1 conjuncts over 3 disjuncts [2020-07-07 11:16:25,813 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-07-07 11:16:25,813 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2020-07-07 11:16:25,814 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:25,823 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:25,825 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-07 11:16:25,825 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:30 [2020-07-07 11:16:25,883 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2020-07-07 11:16:25,884 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:25,896 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:25,900 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-07 11:16:25,900 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:37 [2020-07-07 11:16:25,945 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2020-07-07 11:16:25,946 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:25,955 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:25,956 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:25,957 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:41, output treesize:3 [2020-07-07 11:16:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:16:25,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:16:25,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2020-07-07 11:16:25,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181768706] [2020-07-07 11:16:25,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-07 11:16:25,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:16:25,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-07 11:16:25,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-07-07 11:16:25,977 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 19 states. [2020-07-07 11:16:26,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:16:26,622 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-07-07 11:16:26,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 11:16:26,622 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-07-07 11:16:26,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:16:26,623 INFO L225 Difference]: With dead ends: 81 [2020-07-07 11:16:26,623 INFO L226 Difference]: Without dead ends: 73 [2020-07-07 11:16:26,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2020-07-07 11:16:26,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-07 11:16:26,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 55. [2020-07-07 11:16:26,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-07 11:16:26,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-07-07 11:16:26,639 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 28 [2020-07-07 11:16:26,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:16:26,640 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-07-07 11:16:26,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-07 11:16:26,640 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-07-07 11:16:26,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-07 11:16:26,641 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:16:26,641 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] [2020-07-07 11:16:26,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:16:26,857 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:16:26,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:16:26,858 INFO L82 PathProgramCache]: Analyzing trace with hash 150272518, now seen corresponding path program 1 times [2020-07-07 11:16:26,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:16:26,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317266591] [2020-07-07 11:16:26,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:16:26,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:16:27,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317266591] [2020-07-07 11:16:27,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731651577] [2020-07-07 11:16:27,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:16:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:27,113 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-07 11:16:27,115 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:16:27,134 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-07 11:16:27,134 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:27,137 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:27,137 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:27,138 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-07 11:16:27,166 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:27,167 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-07-07 11:16:27,168 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:27,203 INFO L624 ElimStorePlain]: treesize reduction 14, result has 71.4 percent of original size [2020-07-07 11:16:27,209 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-07 11:16:27,210 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:27,221 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:27,222 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:27,222 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:31 [2020-07-07 11:16:27,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:16:27,268 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-07-07 11:16:27,268 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:27,275 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:27,276 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:27,276 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:25 [2020-07-07 11:16:27,311 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:27,311 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2020-07-07 11:16:27,312 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:27,320 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:27,328 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-07-07 11:16:27,329 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:27,340 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:27,341 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:27,341 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:30 [2020-07-07 11:16:27,369 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 1] term [2020-07-07 11:16:27,370 INFO L501 QuantifierPusher]: Distributing 1 conjuncts over 3 disjuncts [2020-07-07 11:16:27,387 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-07-07 11:16:27,388 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2020-07-07 11:16:27,388 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:27,396 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:27,398 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-07 11:16:27,398 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:30 [2020-07-07 11:16:27,446 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2020-07-07 11:16:27,447 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:27,456 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:27,458 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-07 11:16:27,459 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:37 [2020-07-07 11:16:27,527 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2020-07-07 11:16:27,528 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:27,534 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:27,534 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:27,535 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:41, output treesize:3 [2020-07-07 11:16:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:16:27,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:16:27,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2020-07-07 11:16:27,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194439012] [2020-07-07 11:16:27,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-07 11:16:27,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:16:27,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-07 11:16:27,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-07-07 11:16:27,561 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 19 states. [2020-07-07 11:16:28,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:16:28,268 INFO L93 Difference]: Finished difference Result 103 states and 119 transitions. [2020-07-07 11:16:28,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 11:16:28,268 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-07-07 11:16:28,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:16:28,270 INFO L225 Difference]: With dead ends: 103 [2020-07-07 11:16:28,270 INFO L226 Difference]: Without dead ends: 97 [2020-07-07 11:16:28,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=750, Unknown=0, NotChecked=0, Total=930 [2020-07-07 11:16:28,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-07 11:16:28,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 63. [2020-07-07 11:16:28,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-07 11:16:28,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-07-07 11:16:28,278 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 28 [2020-07-07 11:16:28,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:16:28,278 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-07-07 11:16:28,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-07 11:16:28,278 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-07-07 11:16:28,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-07 11:16:28,279 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:16:28,279 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:16:28,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:16:28,495 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:16:28,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:16:28,496 INFO L82 PathProgramCache]: Analyzing trace with hash -794385695, now seen corresponding path program 3 times [2020-07-07 11:16:28,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:16:28,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713059967] [2020-07-07 11:16:28,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:16:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:16:28,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713059967] [2020-07-07 11:16:28,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828512367] [2020-07-07 11:16:28,731 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:16:28,842 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-07-07 11:16:28,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:16:28,844 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 45 conjunts are in the unsatisfiable core [2020-07-07 11:16:28,848 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:16:28,857 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-07 11:16:28,857 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:28,859 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:28,860 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:28,860 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-07 11:16:28,921 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:28,922 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-07-07 11:16:28,923 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:16:28,926 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:28,950 INFO L624 ElimStorePlain]: treesize reduction 14, result has 60.0 percent of original size [2020-07-07 11:16:28,950 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:28,951 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2020-07-07 11:16:28,991 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-07 11:16:28,991 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:29,005 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:29,012 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-07 11:16:29,013 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:29,027 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:29,028 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:29,030 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:59, output treesize:45 [2020-07-07 11:16:29,078 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:29,078 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 32 [2020-07-07 11:16:29,079 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:16:29,080 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:16:29,080 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:29,100 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:29,102 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_int_35|], 2=[|v_#memory_$Pointer$.base_28|, |v_#memory_$Pointer$.offset_22|]} [2020-07-07 11:16:29,107 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-07 11:16:29,107 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:29,124 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:29,148 INFO L350 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2020-07-07 11:16:29,148 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2020-07-07 11:16:29,149 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:29,185 INFO L624 ElimStorePlain]: treesize reduction 10, result has 84.1 percent of original size [2020-07-07 11:16:29,193 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-07 11:16:29,194 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:29,205 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:29,206 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:29,206 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:91, output treesize:38 [2020-07-07 11:16:29,268 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:29,268 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 160 [2020-07-07 11:16:29,270 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[9, 3, 2, 1] term [2020-07-07 11:16:29,270 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-07-07 11:16:29,274 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:29,341 INFO L624 ElimStorePlain]: treesize reduction 34, result has 83.0 percent of original size [2020-07-07 11:16:29,349 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 108 [2020-07-07 11:16:29,350 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:29,368 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:29,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:16:29,374 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 23 [2020-07-07 11:16:29,375 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:29,386 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:29,386 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:29,387 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:176, output treesize:101 [2020-07-07 11:16:29,429 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_37|, |v_#memory_$Pointer$.offset_24|], 6=[|v_#memory_$Pointer$.base_30|]} [2020-07-07 11:16:29,434 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 48 [2020-07-07 11:16:29,434 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:29,455 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:29,475 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:29,475 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 215 [2020-07-07 11:16:29,476 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-07 11:16:29,477 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:29,509 INFO L624 ElimStorePlain]: treesize reduction 60, result has 74.4 percent of original size [2020-07-07 11:16:29,558 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:29,559 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 182 [2020-07-07 11:16:29,561 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-07 11:16:29,561 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-07 11:16:29,562 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-07 11:16:29,563 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-07 11:16:29,564 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-07 11:16:29,565 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-07 11:16:29,567 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-07 11:16:29,567 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-07 11:16:29,568 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-07 11:16:29,569 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-07 11:16:29,569 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-07 11:16:29,571 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-07 11:16:29,572 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-07 11:16:29,573 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-07 11:16:29,574 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-07 11:16:29,575 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-07 11:16:29,575 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-07 11:16:29,577 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-07 11:16:29,577 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-07 11:16:29,578 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-07 11:16:29,579 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-07 11:16:29,580 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-07 11:16:29,580 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-07 11:16:29,582 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-07 11:16:29,582 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-07 11:16:29,584 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-07 11:16:29,584 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-07 11:16:29,585 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-07 11:16:29,585 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-07 11:16:29,587 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-07 11:16:29,587 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-07 11:16:29,589 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-07 11:16:29,590 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-07 11:16:29,590 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-07 11:16:29,591 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-07 11:16:29,592 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-07 11:16:29,593 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-07 11:16:29,594 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-07 11:16:29,594 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-07 11:16:29,595 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-07 11:16:29,596 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-07 11:16:29,596 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-07 11:16:29,597 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-07 11:16:29,598 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-07 11:16:29,599 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-07 11:16:29,600 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-07 11:16:29,601 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-07 11:16:29,601 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-07 11:16:29,602 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-07 11:16:29,603 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-07 11:16:29,604 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-07 11:16:29,605 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-07 11:16:29,605 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-07 11:16:29,606 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-07 11:16:29,607 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-07 11:16:29,608 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-07 11:16:29,609 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-07 11:16:29,610 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-07 11:16:29,610 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-07 11:16:29,611 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-07 11:16:29,612 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-07 11:16:29,612 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-07 11:16:29,614 INFO L544 ElimStorePlain]: Start of recursive call 4: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-07 11:16:29,659 INFO L624 ElimStorePlain]: treesize reduction 108, result has 34.5 percent of original size [2020-07-07 11:16:29,660 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-07 11:16:29,660 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:265, output treesize:105 [2020-07-07 11:16:29,711 INFO L440 ElimStorePlain]: Different costs {0=[|#memory_$Pointer$.offset|], 2=[|#memory_$Pointer$.base|]} [2020-07-07 11:16:29,714 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 74 [2020-07-07 11:16:29,714 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:29,727 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:29,734 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:29,735 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 49 [2020-07-07 11:16:29,736 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-07 11:16:29,737 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-07 11:16:29,738 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-07 11:16:29,758 INFO L624 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2020-07-07 11:16:29,759 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-07 11:16:29,759 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:123, output treesize:19 [2020-07-07 11:16:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:16:29,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:16:29,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2020-07-07 11:16:29,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690000333] [2020-07-07 11:16:29,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-07 11:16:29,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:16:29,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-07 11:16:29,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-07-07 11:16:29,854 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 22 states. [2020-07-07 11:16:30,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:16:30,772 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2020-07-07 11:16:30,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 11:16:30,773 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-07-07 11:16:30,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:16:30,773 INFO L225 Difference]: With dead ends: 90 [2020-07-07 11:16:30,774 INFO L226 Difference]: Without dead ends: 84 [2020-07-07 11:16:30,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2020-07-07 11:16:30,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-07 11:16:30,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2020-07-07 11:16:30,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-07 11:16:30,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2020-07-07 11:16:30,781 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 30 [2020-07-07 11:16:30,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:16:30,782 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2020-07-07 11:16:30,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-07 11:16:30,782 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2020-07-07 11:16:30,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-07 11:16:30,783 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:16:30,783 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] [2020-07-07 11:16:30,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-07 11:16:30,996 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:16:30,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:16:30,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1568321631, now seen corresponding path program 1 times [2020-07-07 11:16:30,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:16:30,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801855801] [2020-07-07 11:16:30,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:16:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:16:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:16:31,065 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:16:31,065 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:16:31,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-07 11:16:31,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:16:31 BoogieIcfgContainer [2020-07-07 11:16:31,115 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:16:31,116 INFO L168 Benchmark]: Toolchain (without parser) took 13861.31 ms. Allocated memory was 137.9 MB in the beginning and 359.7 MB in the end (delta: 221.8 MB). Free memory was 101.0 MB in the beginning and 308.4 MB in the end (delta: -207.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-07 11:16:31,117 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 11:16:31,117 INFO L168 Benchmark]: CACSL2BoogieTranslator took 581.90 ms. Allocated memory was 137.9 MB in the beginning and 202.9 MB in the end (delta: 65.0 MB). Free memory was 100.7 MB in the beginning and 170.2 MB in the end (delta: -69.5 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2020-07-07 11:16:31,117 INFO L168 Benchmark]: Boogie Preprocessor took 61.35 ms. Allocated memory is still 202.9 MB. Free memory was 170.2 MB in the beginning and 167.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2020-07-07 11:16:31,118 INFO L168 Benchmark]: RCFGBuilder took 611.36 ms. Allocated memory is still 202.9 MB. Free memory was 167.1 MB in the beginning and 121.3 MB in the end (delta: 45.8 MB). Peak memory consumption was 45.8 MB. Max. memory is 7.1 GB. [2020-07-07 11:16:31,118 INFO L168 Benchmark]: TraceAbstraction took 12601.60 ms. Allocated memory was 202.9 MB in the beginning and 359.7 MB in the end (delta: 156.8 MB). Free memory was 121.3 MB in the beginning and 308.4 MB in the end (delta: -187.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-07 11:16:31,120 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 581.90 ms. Allocated memory was 137.9 MB in the beginning and 202.9 MB in the end (delta: 65.0 MB). Free memory was 100.7 MB in the beginning and 170.2 MB in the end (delta: -69.5 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.35 ms. Allocated memory is still 202.9 MB. Free memory was 170.2 MB in the beginning and 167.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 611.36 ms. Allocated memory is still 202.9 MB. Free memory was 167.1 MB in the beginning and 121.3 MB in the end (delta: 45.8 MB). Peak memory consumption was 45.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12601.60 ms. Allocated memory was 202.9 MB in the beginning and 359.7 MB in the end (delta: 156.8 MB). Free memory was 121.3 MB in the beginning and 308.4 MB in the end (delta: -187.1 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] List a = (List) malloc(sizeof(struct node)); VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L522] COND FALSE !(a == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L523] List t; [L524] List p = a; VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L525] COND TRUE __VERIFIER_nondet_int() [L526] p->h = 1 [L527] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L528] COND FALSE !(t == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L529] p->n = t [L530] EXPR p->n [L530] p = p->n [L525] COND FALSE !(__VERIFIER_nondet_int()) [L532] COND TRUE __VERIFIER_nondet_int() [L533] p->h = 2 [L534] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-3:0}] [L535] COND FALSE !(t == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-3:0}] [L536] p->n = t [L537] EXPR p->n [L537] p = p->n [L532] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 [L540] p = a VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-3:0}] [L541] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=1, t={-3:0}] [L541] COND FALSE !(p->h == 2) [L543] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=1, t={-3:0}] [L543] COND TRUE p->h == 1 [L544] EXPR p->n [L544] p = p->n [L543] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->h=2, t={-3:0}] [L543] COND FALSE !(p->h == 1) [L545] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->h=2, t={-3:0}] [L545] COND TRUE p->h != 3 [L546] __VERIFIER_error() VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.4s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 250 SDtfs, 622 SDslu, 1378 SDs, 0 SdLazy, 2331 SolverSat, 268 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 395 GetRequests, 200 SyntacticMatches, 8 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 169 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 542 NumberOfCodeBlocks, 542 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 492 ConstructedInterpolants, 18 QuantifiedInterpolants, 145526 SizeOfPredicates, 107 NumberOfNonLiveVariables, 926 ConjunctsInSsa, 294 ConjunctsInUnsatCore, 20 InterpolantComputations, 4 PerfectInterpolantSequences, 16/92 InterpolantCoveringCapability, 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...