/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/heap-data/running_example.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 21:51:47,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 21:51:47,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 21:51:47,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 21:51:47,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 21:51:47,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 21:51:47,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 21:51:47,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 21:51:47,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 21:51:47,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 21:51:47,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 21:51:47,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 21:51:47,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 21:51:47,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 21:51:47,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 21:51:47,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 21:51:47,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 21:51:47,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 21:51:47,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 21:51:47,919 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 21:51:47,920 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 21:51:47,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 21:51:47,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 21:51:47,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 21:51:47,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 21:51:47,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 21:51:47,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 21:51:47,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 21:51:47,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 21:51:47,928 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 21:51:47,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 21:51:47,929 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 21:51:47,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 21:51:47,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 21:51:47,930 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 21:51:47,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 21:51:47,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 21:51:47,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 21:51:47,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 21:51:47,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 21:51:47,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 21:51:47,935 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 21:51:47,964 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 21:51:47,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 21:51:47,965 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 21:51:47,965 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 21:51:47,965 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 21:51:47,965 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 21:51:47,965 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 21:51:47,966 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 21:51:47,966 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 21:51:47,966 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 21:51:47,966 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 21:51:47,966 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 21:51:47,966 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 21:51:47,966 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 21:51:47,966 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 21:51:47,966 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 21:51:47,966 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 21:51:47,966 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 21:51:47,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 21:51:47,967 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 21:51:47,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 21:51:47,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 21:51:47,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 21:51:47,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 21:51:47,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 21:51:47,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 21:51:47,967 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 21:51:47,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 21:51:47,968 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 21:51:47,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 21:51:47,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 21:51:47,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 21:51:47,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:51:47,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 21:51:47,968 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 21:51:47,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 21:51:47,968 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 21:51:47,968 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 21:51:47,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 21:51:47,969 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 21:51:47,969 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 21:51:47,969 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 21:51:48,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 21:51:48,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 21:51:48,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 21:51:48,225 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 21:51:48,226 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 21:51:48,227 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-data/running_example.i [2023-04-02 21:51:49,417 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 21:51:49,687 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 21:51:49,688 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/running_example.i [2023-04-02 21:51:49,704 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/232f1abf5/951ccff24d9e4274bec675d810907b48/FLAG71bbbd5a4 [2023-04-02 21:51:49,716 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/232f1abf5/951ccff24d9e4274bec675d810907b48 [2023-04-02 21:51:49,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 21:51:49,719 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 21:51:49,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 21:51:49,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 21:51:49,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 21:51:49,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:51:49" (1/1) ... [2023-04-02 21:51:49,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67d6baa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:51:49, skipping insertion in model container [2023-04-02 21:51:49,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:51:49" (1/1) ... [2023-04-02 21:51:49,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 21:51:49,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 21:51:49,981 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/running_example.i[23610,23623] [2023-04-02 21:51:49,989 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:51:50,006 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 21:51:50,041 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/running_example.i[23610,23623] [2023-04-02 21:51:50,043 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:51:50,065 INFO L208 MainTranslator]: Completed translation [2023-04-02 21:51:50,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:51:50 WrapperNode [2023-04-02 21:51:50,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 21:51:50,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 21:51:50,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 21:51:50,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 21:51:50,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:51:50" (1/1) ... [2023-04-02 21:51:50,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:51:50" (1/1) ... [2023-04-02 21:51:50,088 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:51:50" (1/1) ... [2023-04-02 21:51:50,088 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:51:50" (1/1) ... [2023-04-02 21:51:50,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:51:50" (1/1) ... [2023-04-02 21:51:50,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:51:50" (1/1) ... [2023-04-02 21:51:50,123 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:51:50" (1/1) ... [2023-04-02 21:51:50,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:51:50" (1/1) ... [2023-04-02 21:51:50,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 21:51:50,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 21:51:50,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 21:51:50,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 21:51:50,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:51:50" (1/1) ... [2023-04-02 21:51:50,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:51:50,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:51:50,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 21:51:50,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 21:51:50,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 21:51:50,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 21:51:50,208 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 21:51:50,209 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-02 21:51:50,209 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-02 21:51:50,210 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 21:51:50,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 21:51:50,210 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 21:51:50,210 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 21:51:50,210 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 21:51:50,210 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 21:51:50,210 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 21:51:50,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 21:51:50,211 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-02 21:51:50,211 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-02 21:51:50,211 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-02 21:51:50,211 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-02 21:51:50,211 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-02 21:51:50,212 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-02 21:51:50,212 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-02 21:51:50,212 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-02 21:51:50,212 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-02 21:51:50,212 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-02 21:51:50,212 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-02 21:51:50,212 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-02 21:51:50,212 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-02 21:51:50,212 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-02 21:51:50,213 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-02 21:51:50,213 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-02 21:51:50,213 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-02 21:51:50,214 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-02 21:51:50,214 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-02 21:51:50,214 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-02 21:51:50,214 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-02 21:51:50,214 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-02 21:51:50,214 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-02 21:51:50,214 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-02 21:51:50,214 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-02 21:51:50,214 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-02 21:51:50,214 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-02 21:51:50,215 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-02 21:51:50,215 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-02 21:51:50,215 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-02 21:51:50,216 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-02 21:51:50,216 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-02 21:51:50,216 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-02 21:51:50,217 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-02 21:51:50,217 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-02 21:51:50,217 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-02 21:51:50,217 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-02 21:51:50,217 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-02 21:51:50,217 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-02 21:51:50,217 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-02 21:51:50,218 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-02 21:51:50,218 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-02 21:51:50,218 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-02 21:51:50,219 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-02 21:51:50,219 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-02 21:51:50,219 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-02 21:51:50,219 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-02 21:51:50,220 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-02 21:51:50,220 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-02 21:51:50,220 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-02 21:51:50,220 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-02 21:51:50,220 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-02 21:51:50,220 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 21:51:50,220 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-02 21:51:50,220 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-02 21:51:50,221 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 21:51:50,221 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-02 21:51:50,221 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-02 21:51:50,221 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-02 21:51:50,221 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-02 21:51:50,221 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-02 21:51:50,221 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-02 21:51:50,221 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-02 21:51:50,221 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-02 21:51:50,222 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 21:51:50,222 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-02 21:51:50,222 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-02 21:51:50,222 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-02 21:51:50,222 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-02 21:51:50,223 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-02 21:51:50,223 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-02 21:51:50,224 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-02 21:51:50,224 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-02 21:51:50,224 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-02 21:51:50,224 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-02 21:51:50,224 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-02 21:51:50,224 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-02 21:51:50,224 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-02 21:51:50,224 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-02 21:51:50,224 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-02 21:51:50,224 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-02 21:51:50,224 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-02 21:51:50,224 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-02 21:51:50,225 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-02 21:51:50,225 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-02 21:51:50,225 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-02 21:51:50,225 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-02 21:51:50,225 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-02 21:51:50,225 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-02 21:51:50,225 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-02 21:51:50,225 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-02 21:51:50,225 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-02 21:51:50,225 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-02 21:51:50,226 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-02 21:51:50,226 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-02 21:51:50,226 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-02 21:51:50,226 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-02 21:51:50,226 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-02 21:51:50,226 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-02 21:51:50,226 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-02 21:51:50,227 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-02 21:51:50,227 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-02 21:51:50,227 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-02 21:51:50,227 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-02 21:51:50,227 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 21:51:50,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 21:51:50,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 21:51:50,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 21:51:50,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 21:51:50,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 21:51:50,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 21:51:50,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 21:51:50,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 21:51:50,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 21:51:50,435 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 21:51:50,437 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 21:51:50,630 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 21:51:50,673 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 21:51:50,674 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-02 21:51:50,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:51:50 BoogieIcfgContainer [2023-04-02 21:51:50,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 21:51:50,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 21:51:50,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 21:51:50,681 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 21:51:50,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 09:51:49" (1/3) ... [2023-04-02 21:51:50,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e05d06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:51:50, skipping insertion in model container [2023-04-02 21:51:50,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:51:50" (2/3) ... [2023-04-02 21:51:50,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e05d06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:51:50, skipping insertion in model container [2023-04-02 21:51:50,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:51:50" (3/3) ... [2023-04-02 21:51:50,683 INFO L112 eAbstractionObserver]: Analyzing ICFG running_example.i [2023-04-02 21:51:50,699 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 21:51:50,699 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 21:51:50,740 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 21:51:50,746 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@58e65e7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 21:51:50,746 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 21:51:50,750 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 21:51:50,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-02 21:51:50,757 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:51:50,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:51:50,758 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:51:50,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:51:50,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1623878864, now seen corresponding path program 1 times [2023-04-02 21:51:50,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:51:50,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397121354] [2023-04-02 21:51:50,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:51:50,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:51:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:51:50,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:51:50,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:51:50,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397121354] [2023-04-02 21:51:50,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397121354] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:51:50,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:51:50,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 21:51:50,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490654016] [2023-04-02 21:51:50,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:51:50,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 21:51:50,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:51:51,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 21:51:51,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 21:51:51,010 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:51:51,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:51:51,049 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2023-04-02 21:51:51,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 21:51:51,054 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-04-02 21:51:51,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:51:51,063 INFO L225 Difference]: With dead ends: 24 [2023-04-02 21:51:51,063 INFO L226 Difference]: Without dead ends: 15 [2023-04-02 21:51:51,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 21:51:51,069 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:51:51,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:51:51,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-04-02 21:51:51,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-04-02 21:51:51,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:51:51,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-04-02 21:51:51,099 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2023-04-02 21:51:51,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:51:51,099 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-04-02 21:51:51,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:51:51,100 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-04-02 21:51:51,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 21:51:51,100 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:51:51,100 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:51:51,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 21:51:51,101 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:51:51,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:51:51,102 INFO L85 PathProgramCache]: Analyzing trace with hash -795281626, now seen corresponding path program 1 times [2023-04-02 21:51:51,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:51:51,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545350144] [2023-04-02 21:51:51,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:51:51,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:51:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:51:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:51:51,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:51:51,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545350144] [2023-04-02 21:51:51,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545350144] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:51:51,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:51:51,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 21:51:51,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824717339] [2023-04-02 21:51:51,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:51:51,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 21:51:51,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:51:51,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 21:51:51,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 21:51:51,468 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:51:51,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:51:51,563 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2023-04-02 21:51:51,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 21:51:51,563 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-02 21:51:51,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:51:51,564 INFO L225 Difference]: With dead ends: 26 [2023-04-02 21:51:51,564 INFO L226 Difference]: Without dead ends: 24 [2023-04-02 21:51:51,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-02 21:51:51,570 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:51:51,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 43 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:51:51,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-02 21:51:51,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-04-02 21:51:51,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:51:51,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-04-02 21:51:51,585 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 12 [2023-04-02 21:51:51,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:51:51,586 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-04-02 21:51:51,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:51:51,587 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-04-02 21:51:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 21:51:51,587 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:51:51,587 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:51:51,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 21:51:51,588 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:51:51,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:51:51,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1190310735, now seen corresponding path program 1 times [2023-04-02 21:51:51,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:51:51,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657786170] [2023-04-02 21:51:51,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:51:51,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:51:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:51:52,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:51:52,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:51:52,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657786170] [2023-04-02 21:51:52,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657786170] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:51:52,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550490344] [2023-04-02 21:51:52,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:51:52,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:51:52,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:51:52,105 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:51:52,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 21:51:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:51:52,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-02 21:51:52,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:51:52,307 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 15 [2023-04-02 21:51:52,314 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 15 [2023-04-02 21:51:52,500 INFO L350 Elim1Store]: Elim1 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 90 treesize of output 84 [2023-04-02 21:51:52,522 INFO L350 Elim1Store]: Elim1 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 74 treesize of output 68 [2023-04-02 21:51:52,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 59 [2023-04-02 21:51:52,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 40 treesize of output 36 [2023-04-02 21:51:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:51:52,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:51:52,659 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:51:52,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 91 treesize of output 103 [2023-04-02 21:51:52,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 81 treesize of output 77 [2023-04-02 21:51:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:51:52,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550490344] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:51:52,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1735494125] [2023-04-02 21:51:52,823 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 21:51:52,823 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:51:52,828 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:51:52,833 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:51:52,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:51:52,899 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:51:53,234 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:51:53,239 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:51:53,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1735494125] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:51:53,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:51:53,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5, 5, 5] total 18 [2023-04-02 21:51:53,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215035339] [2023-04-02 21:51:53,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:51:53,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 21:51:53,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:51:54,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 21:51:54,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-04-02 21:51:54,000 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 11 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:51:55,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:51:55,634 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2023-04-02 21:51:55,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 21:51:55,634 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-02 21:51:55,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:51:55,635 INFO L225 Difference]: With dead ends: 45 [2023-04-02 21:51:55,635 INFO L226 Difference]: Without dead ends: 29 [2023-04-02 21:51:55,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2023-04-02 21:51:55,637 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 96 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 21:51:55,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 4 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 21:51:55,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-02 21:51:55,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2023-04-02 21:51:55,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:51:55,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-04-02 21:51:55,643 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 15 [2023-04-02 21:51:55,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:51:55,643 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-04-02 21:51:55,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:51:55,644 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-04-02 21:51:55,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-02 21:51:55,644 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:51:55,644 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:51:55,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 21:51:55,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:51:55,853 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:51:55,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:51:55,853 INFO L85 PathProgramCache]: Analyzing trace with hash 438175136, now seen corresponding path program 1 times [2023-04-02 21:51:55,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:51:55,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863549742] [2023-04-02 21:51:55,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:51:55,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:51:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:51:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:51:56,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:51:56,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863549742] [2023-04-02 21:51:56,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863549742] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:51:56,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237139750] [2023-04-02 21:51:56,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:51:56,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:51:56,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:51:56,128 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:51:56,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 21:51:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:51:56,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-02 21:51:56,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:51:56,253 INFO L350 Elim1Store]: Elim1 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 [2023-04-02 21:51:56,257 INFO L350 Elim1Store]: Elim1 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 [2023-04-02 21:51:56,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:51:56,305 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 26 [2023-04-02 21:51:56,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:51:56,311 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2023-04-02 21:51:56,319 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-02 21:51:56,320 INFO L350 Elim1Store]: Elim1 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 11 [2023-04-02 21:51:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:51:56,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:51:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:51:56,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237139750] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:51:56,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [585280018] [2023-04-02 21:51:56,550 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 21:51:56,550 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:51:56,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:51:56,551 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:51:56,551 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:51:56,566 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:51:56,740 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:51:56,744 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:51:57,089 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '486#(and (<= 1 |#StackHeapBarrier|) (<= (+ main_~tail~0.base 1) |#StackHeapBarrier|) (= main_~list~0.base main_~p~0.base) (<= (+ main_~list~0.base 1) |#StackHeapBarrier|) (exists ((|v_main_#t~mem9_22| Int) (|v_main_#t~mem9_21| Int) (|v_main_#t~short10_10| Bool)) (and (or (and (not |v_main_#t~short10_10|) (< 20 (select (select |#memory_int| main_~p~0.base) 0))) (and |v_main_#t~short10_10| (<= (select (select |#memory_int| main_~p~0.base) 0) 20))) (or (and (not |v_main_#t~short10_10|) (= |v_main_#t~mem9_22| |v_main_#t~mem9_21|)) (and (< |v_main_#t~mem9_22| 10) (= (select (select |#memory_int| main_~p~0.base) 0) |v_main_#t~mem9_22|) |v_main_#t~short10_10|)))) (= main_~list~0.offset 0) (not (= main_~p~0.base 0)) (= |#NULL.offset| 0) (= main_~tail~0.offset 0) (= main_~p~0.offset 0) (= |#NULL.base| 0))' at error location [2023-04-02 21:51:57,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:51:57,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:51:57,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-04-02 21:51:57,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029982337] [2023-04-02 21:51:57,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:51:57,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 21:51:57,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:51:57,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 21:51:57,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-04-02 21:51:57,091 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:51:59,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-02 21:52:01,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-02 21:52:03,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-02 21:52:05,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-02 21:52:07,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-02 21:52:11,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:52:11,955 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2023-04-02 21:52:11,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 21:52:11,956 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-02 21:52:11,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:52:11,956 INFO L225 Difference]: With dead ends: 34 [2023-04-02 21:52:11,957 INFO L226 Difference]: Without dead ends: 32 [2023-04-02 21:52:11,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=133, Invalid=678, Unknown=1, NotChecked=0, Total=812 [2023-04-02 21:52:11,959 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 68 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 12 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2023-04-02 21:52:11,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 93 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 71 Invalid, 5 Unknown, 0 Unchecked, 10.5s Time] [2023-04-02 21:52:11,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-02 21:52:11,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 21. [2023-04-02 21:52:11,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:52:11,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-04-02 21:52:11,968 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 16 [2023-04-02 21:52:11,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:52:11,968 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-04-02 21:52:11,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:52:11,968 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-04-02 21:52:11,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 21:52:11,969 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:52:11,969 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:52:11,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 21:52:12,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-02 21:52:12,180 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:52:12,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:52:12,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1274868727, now seen corresponding path program 1 times [2023-04-02 21:52:12,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:52:12,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468638745] [2023-04-02 21:52:12,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:52:12,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:52:12,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:52:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:52:13,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:52:13,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468638745] [2023-04-02 21:52:13,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468638745] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:52:13,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978757132] [2023-04-02 21:52:13,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:52:13,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:52:13,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:52:13,013 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:52:13,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 21:52:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:52:13,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-02 21:52:13,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:52:13,166 INFO L350 Elim1Store]: Elim1 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 [2023-04-02 21:52:13,175 INFO L350 Elim1Store]: Elim1 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 [2023-04-02 21:52:13,242 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 27 [2023-04-02 21:52:13,249 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-04-02 21:52:13,255 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-02 21:52:13,261 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-04-02 21:52:13,275 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-02 21:52:13,276 INFO L350 Elim1Store]: Elim1 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 40 treesize of output 39 [2023-04-02 21:52:13,288 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2023-04-02 21:52:13,288 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2023-04-02 21:52:13,306 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2023-04-02 21:52:13,306 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2023-04-02 21:52:13,324 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-04-02 21:52:13,325 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 15 [2023-04-02 21:52:13,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 36 treesize of output 30 [2023-04-02 21:52:13,462 INFO L350 Elim1Store]: Elim1 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 38 treesize of output 22 [2023-04-02 21:52:13,473 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 3 [2023-04-02 21:52:13,497 INFO L350 Elim1Store]: Elim1 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 52 treesize of output 36 [2023-04-02 21:52:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:52:13,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:52:13,595 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_main_~p~0.offset 4))) (let ((.cse0 (select (select |c_#memory_int| c_main_~p~0.base) c_main_~p~0.offset)) (.cse1 (select (select |c_#memory_$Pointer$.base| c_main_~p~0.base) .cse3)) (.cse2 (select (select |c_#memory_$Pointer$.offset| c_main_~p~0.base) .cse3))) (and (or (<= 20 .cse0) (and (forall ((v_ArrVal_250 (Array Int Int))) (<= 10 (select (select (store |c_#memory_int| c_main_~p~0.base v_ArrVal_250) .cse1) .cse2))) (forall ((v_ArrVal_250 (Array Int Int))) (< (select (select (store |c_#memory_int| c_main_~p~0.base v_ArrVal_250) .cse1) .cse2) 21)))) (or (< .cse0 20) (and (forall ((v_ArrVal_254 (Array Int Int))) (< (select (select (store |c_#memory_int| c_main_~p~0.base v_ArrVal_254) .cse1) .cse2) 21)) (forall ((v_ArrVal_254 (Array Int Int))) (<= 10 (select (select (store |c_#memory_int| c_main_~p~0.base v_ArrVal_254) .cse1) .cse2)))))))) is different from false [2023-04-02 21:52:13,733 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:52:13,734 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 130 [2023-04-02 21:52:13,743 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:52:13,744 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 114 [2023-04-02 21:52:13,759 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:52:13,760 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 294 treesize of output 215 [2023-04-02 21:52:13,769 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:52:13,770 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 197 treesize of output 168 [2023-04-02 21:52:13,788 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:52:13,789 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 312 treesize of output 293 [2023-04-02 21:52:13,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 129 treesize of output 121 [2023-04-02 21:52:13,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 121 treesize of output 113 [2023-04-02 21:52:31,604 WARN L223 SmtUtils]: Spent 16.29s on a formula simplification. DAG size of input: 157 DAG size of output: 118 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 21:52:33,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-04-02 21:52:33,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978757132] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:52:33,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [260890705] [2023-04-02 21:52:33,038 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 21:52:33,038 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:52:33,038 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:52:33,039 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:52:33,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:52:33,061 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:52:33,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:52:33,441 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:52:33,778 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '718#(and (<= 1 |#StackHeapBarrier|) (<= (+ main_~tail~0.base 1) |#StackHeapBarrier|) (<= (+ main_~list~0.base 1) |#StackHeapBarrier|) (= main_~list~0.offset 0) (= |#NULL.offset| 0) (= main_~tail~0.offset 0) (= |#NULL.base| 0))' at error location [2023-04-02 21:52:33,779 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:52:33,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:52:33,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-04-02 21:52:33,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808662073] [2023-04-02 21:52:33,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:52:33,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 21:52:33,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:52:33,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 21:52:33,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=327, Unknown=1, NotChecked=36, Total=420 [2023-04-02 21:52:33,780 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:52:34,329 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_main_~list~0.offset 4))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| c_main_~list~0.base) .cse3)) (.cse2 (select (select |c_#memory_$Pointer$.offset| c_main_~list~0.base) .cse3)) (.cse0 (select (select |c_#memory_int| c_main_~p~0.base) 0))) (and (= c_main_~p~0.offset 0) (<= .cse0 20) (forall ((v_ArrVal_254 (Array Int Int))) (<= 10 (select (select (store |c_#memory_int| c_main_~list~0.base v_ArrVal_254) .cse1) .cse2))) (forall ((v_ArrVal_254 (Array Int Int))) (< (select (select (store |c_#memory_int| c_main_~list~0.base v_ArrVal_254) .cse1) .cse2) 21)) (<= 10 .cse0)))) is different from false [2023-04-02 21:52:34,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:52:34,355 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2023-04-02 21:52:34,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 21:52:34,356 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-04-02 21:52:34,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:52:34,357 INFO L225 Difference]: With dead ends: 35 [2023-04-02 21:52:34,357 INFO L226 Difference]: Without dead ends: 33 [2023-04-02 21:52:34,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=100, Invalid=458, Unknown=2, NotChecked=90, Total=650 [2023-04-02 21:52:34,357 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 21:52:34,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 96 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 60 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2023-04-02 21:52:34,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-02 21:52:34,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2023-04-02 21:52:34,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:52:34,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2023-04-02 21:52:34,367 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 19 [2023-04-02 21:52:34,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:52:34,368 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2023-04-02 21:52:34,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:52:34,368 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2023-04-02 21:52:34,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-02 21:52:34,368 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:52:34,368 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:52:34,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 21:52:34,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:52:34,575 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:52:34,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:52:34,576 INFO L85 PathProgramCache]: Analyzing trace with hash -776547776, now seen corresponding path program 2 times [2023-04-02 21:52:34,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:52:34,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728997010] [2023-04-02 21:52:34,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:52:34,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:52:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:52:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:52:35,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:52:35,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728997010] [2023-04-02 21:52:35,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728997010] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:52:35,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355436512] [2023-04-02 21:52:35,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 21:52:35,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:52:35,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:52:35,525 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:52:35,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 21:52:35,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 21:52:35,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:52:35,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 46 conjunts are in the unsatisfiable core [2023-04-02 21:52:35,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:52:35,742 INFO L350 Elim1Store]: Elim1 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 [2023-04-02 21:52:35,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:52:35,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:52:35,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 26 [2023-04-02 21:52:35,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:52:35,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:52:35,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 26 [2023-04-02 21:52:35,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:52:35,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 23 treesize of output 23 [2023-04-02 21:52:35,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15 [2023-04-02 21:52:35,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:52:35,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 23 treesize of output 23 [2023-04-02 21:52:35,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15 [2023-04-02 21:52:35,827 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2023-04-02 21:52:35,837 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-04-02 21:52:35,837 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 15 [2023-04-02 21:52:35,843 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2023-04-02 21:52:35,965 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-02 21:52:35,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 105 [2023-04-02 21:52:35,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 82 [2023-04-02 21:52:35,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 59 [2023-04-02 21:52:35,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 40 treesize of output 36 [2023-04-02 21:52:36,067 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 1 [2023-04-02 21:52:36,216 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-02 21:52:36,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 183 treesize of output 119 [2023-04-02 21:52:36,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 107 [2023-04-02 21:52:36,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 76 [2023-04-02 21:52:36,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 40 treesize of output 36 [2023-04-02 21:52:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:52:36,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:52:36,386 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:52:36,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 91 treesize of output 103 [2023-04-02 21:52:36,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 81 treesize of output 77 [2023-04-02 21:52:36,634 INFO L321 Elim1Store]: treesize reduction 15, result has 67.4 percent of original size [2023-04-02 21:52:36,635 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 489 treesize of output 432 [2023-04-02 21:52:36,748 INFO L321 Elim1Store]: treesize reduction 15, result has 67.4 percent of original size [2023-04-02 21:52:36,749 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 757 treesize of output 612 [2023-04-02 21:52:36,781 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:52:36,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 281 treesize of output 270 [2023-04-02 21:52:36,924 INFO L321 Elim1Store]: treesize reduction 42, result has 77.3 percent of original size [2023-04-02 21:52:36,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1104 treesize of output 1154 [2023-04-02 21:52:37,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:52:37,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 3741 treesize of output 3653 [2023-04-02 21:52:37,380 INFO L321 Elim1Store]: treesize reduction 8, result has 94.1 percent of original size [2023-04-02 21:52:37,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 1581 treesize of output 1527 [2023-04-02 21:52:37,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:52:37,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 5402 treesize of output 4730