/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 IntervalDomain -i ../sv-benchmarks/c/heap-data/hash_fun.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:55:58,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:55:58,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:55:58,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:55:58,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:55:58,218 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:55:58,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:55:58,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:55:58,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:55:58,224 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:55:58,225 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:55:58,227 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:55:58,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:55:58,228 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:55:58,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:55:58,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:55:58,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:55:58,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:55:58,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:55:58,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:55:58,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:55:58,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:55:58,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:55:58,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:55:58,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:55:58,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:55:58,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:55:58,242 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:55:58,243 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:55:58,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:55:58,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:55:58,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:55:58,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:55:58,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:55:58,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:55:58,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:55:58,247 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:55:58,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:55:58,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:55:58,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:55:58,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:55:58,254 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 [2023-03-31 22:55:58,282 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:55:58,283 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:55:58,283 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:55:58,283 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:55:58,284 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:55:58,284 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:55:58,284 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:55:58,284 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:55:58,285 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:55:58,285 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:55:58,285 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:55:58,285 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:55:58,285 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:55:58,285 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:55:58,285 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:55:58,286 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:55:58,286 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:55:58,286 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:55:58,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:55:58,287 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:55:58,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:55:58,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:55:58,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:55:58,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:55:58,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:55:58,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:55:58,288 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:55:58,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:55:58,292 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:55:58,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:55:58,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:55:58,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:55:58,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:55:58,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:55:58,293 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:55:58,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:55:58,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:55:58,294 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:55:58,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:55:58,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:55:58,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:55:58,295 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:55:58,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:55:58,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:55:58,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:55:58,583 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:55:58,584 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:55:58,585 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-data/hash_fun.i [2023-03-31 22:55:59,702 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:55:59,895 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:55:59,895 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/hash_fun.i [2023-03-31 22:55:59,907 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0996b4857/58ebb537e7114dd793b1c7b0d1905aec/FLAG4552e1389 [2023-03-31 22:55:59,919 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0996b4857/58ebb537e7114dd793b1c7b0d1905aec [2023-03-31 22:55:59,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:55:59,922 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:55:59,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:55:59,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:55:59,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:55:59,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:55:59" (1/1) ... [2023-03-31 22:55:59,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21ecd104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:59, skipping insertion in model container [2023-03-31 22:55:59,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:55:59" (1/1) ... [2023-03-31 22:55:59,935 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:55:59,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:56:00,155 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/hash_fun.i[23732,23745] [2023-03-31 22:56:00,159 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:56:00,167 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:56:00,216 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/hash_fun.i[23732,23745] [2023-03-31 22:56:00,217 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:56:00,255 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:56:00,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:00 WrapperNode [2023-03-31 22:56:00,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:56:00,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:56:00,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:56:00,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:56:00,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:00" (1/1) ... [2023-03-31 22:56:00,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:00" (1/1) ... [2023-03-31 22:56:00,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:00" (1/1) ... [2023-03-31 22:56:00,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:00" (1/1) ... [2023-03-31 22:56:00,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:00" (1/1) ... [2023-03-31 22:56:00,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:00" (1/1) ... [2023-03-31 22:56:00,304 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:00" (1/1) ... [2023-03-31 22:56:00,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:00" (1/1) ... [2023-03-31 22:56:00,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:56:00,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:56:00,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:56:00,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:56:00,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:00" (1/1) ... [2023-03-31 22:56:00,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:56:00,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:56:00,342 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) [2023-03-31 22:56:00,344 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 [2023-03-31 22:56:00,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:56:00,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:56:00,380 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:56:00,381 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-03-31 22:56:00,381 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-03-31 22:56:00,381 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_fun [2023-03-31 22:56:00,381 INFO L138 BoogieDeclarations]: Found implementation of procedure append_to_list [2023-03-31 22:56:00,381 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:56:00,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:56:00,382 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:56:00,382 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:56:00,382 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 22:56:00,382 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 22:56:00,382 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:56:00,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:56:00,382 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-03-31 22:56:00,382 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-03-31 22:56:00,382 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-03-31 22:56:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-03-31 22:56:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-03-31 22:56:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-03-31 22:56:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-03-31 22:56:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-03-31 22:56:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-03-31 22:56:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-03-31 22:56:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-03-31 22:56:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-03-31 22:56:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-03-31 22:56:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-03-31 22:56:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-03-31 22:56:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-03-31 22:56:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-03-31 22:56:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-03-31 22:56:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-03-31 22:56:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-03-31 22:56:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-03-31 22:56:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-03-31 22:56:00,385 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-03-31 22:56:00,385 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-03-31 22:56:00,385 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-03-31 22:56:00,385 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-03-31 22:56:00,385 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-03-31 22:56:00,385 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-03-31 22:56:00,385 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-03-31 22:56:00,385 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-03-31 22:56:00,385 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-03-31 22:56:00,386 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-03-31 22:56:00,386 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-03-31 22:56:00,386 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-03-31 22:56:00,386 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-03-31 22:56:00,386 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-03-31 22:56:00,386 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-03-31 22:56:00,386 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-03-31 22:56:00,386 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-03-31 22:56:00,386 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-03-31 22:56:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-03-31 22:56:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-03-31 22:56:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-03-31 22:56:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-03-31 22:56:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-03-31 22:56:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-03-31 22:56:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-03-31 22:56:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-03-31 22:56:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-03-31 22:56:00,388 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-03-31 22:56:00,388 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-03-31 22:56:00,388 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-03-31 22:56:00,388 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 22:56:00,388 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-03-31 22:56:00,388 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-03-31 22:56:00,388 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 22:56:00,388 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-03-31 22:56:00,388 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-03-31 22:56:00,389 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-03-31 22:56:00,389 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-03-31 22:56:00,389 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-03-31 22:56:00,389 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-03-31 22:56:00,389 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-03-31 22:56:00,389 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-03-31 22:56:00,389 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:56:00,389 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-03-31 22:56:00,389 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-03-31 22:56:00,390 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-03-31 22:56:00,390 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-03-31 22:56:00,390 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-03-31 22:56:00,390 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-03-31 22:56:00,390 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-03-31 22:56:00,390 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-03-31 22:56:00,390 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-03-31 22:56:00,390 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-03-31 22:56:00,390 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-03-31 22:56:00,391 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-03-31 22:56:00,391 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-03-31 22:56:00,391 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-03-31 22:56:00,391 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-03-31 22:56:00,391 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-03-31 22:56:00,391 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-03-31 22:56:00,391 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-03-31 22:56:00,391 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-03-31 22:56:00,391 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-03-31 22:56:00,391 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-03-31 22:56:00,392 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-03-31 22:56:00,392 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-03-31 22:56:00,392 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-03-31 22:56:00,392 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-03-31 22:56:00,392 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-03-31 22:56:00,392 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-03-31 22:56:00,392 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-03-31 22:56:00,392 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-03-31 22:56:00,392 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-03-31 22:56:00,392 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-03-31 22:56:00,393 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-03-31 22:56:00,393 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-03-31 22:56:00,393 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-03-31 22:56:00,393 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-03-31 22:56:00,393 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-03-31 22:56:00,393 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-03-31 22:56:00,393 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-03-31 22:56:00,393 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-03-31 22:56:00,393 INFO L130 BoogieDeclarations]: Found specification of procedure hash_fun [2023-03-31 22:56:00,394 INFO L130 BoogieDeclarations]: Found specification of procedure append_to_list [2023-03-31 22:56:00,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 22:56:00,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 22:56:00,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 22:56:00,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:56:00,394 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:56:00,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 22:56:00,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-03-31 22:56:00,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:56:00,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:56:00,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:56:00,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:56:00,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:56:00,652 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:56:00,654 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:56:00,793 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:56:00,826 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:56:00,827 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 22:56:00,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:56:00 BoogieIcfgContainer [2023-03-31 22:56:00,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:56:00,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:56:00,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:56:00,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:56:00,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:55:59" (1/3) ... [2023-03-31 22:56:00,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef8f817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:56:00, skipping insertion in model container [2023-03-31 22:56:00,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:00" (2/3) ... [2023-03-31 22:56:00,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef8f817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:56:00, skipping insertion in model container [2023-03-31 22:56:00,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:56:00" (3/3) ... [2023-03-31 22:56:00,836 INFO L112 eAbstractionObserver]: Analyzing ICFG hash_fun.i [2023-03-31 22:56:00,850 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:56:00,851 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:56:00,887 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:56:00,892 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;@735876eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:56:00,892 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:56:00,896 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.5) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:56:00,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-03-31 22:56:00,901 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:00,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:56:00,902 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:00,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:00,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1429999975, now seen corresponding path program 1 times [2023-03-31 22:56:00,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:00,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460191481] [2023-03-31 22:56:00,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:00,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:01,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:56:01,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460191481] [2023-03-31 22:56:01,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460191481] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:56:01,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:56:01,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 22:56:01,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790346746] [2023-03-31 22:56:01,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:56:01,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 22:56:01,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:56:01,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 22:56:01,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 22:56:01,142 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.5) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2023-03-31 22:56:01,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:56:01,179 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2023-03-31 22:56:01,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 22:56:01,181 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 [2023-03-31 22:56:01,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:56:01,189 INFO L225 Difference]: With dead ends: 36 [2023-03-31 22:56:01,189 INFO L226 Difference]: Without dead ends: 22 [2023-03-31 22:56:01,191 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 [2023-03-31 22:56:01,195 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:56:01,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:56:01,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-03-31 22:56:01,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-03-31 22:56:01,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:56:01,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-03-31 22:56:01,226 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2023-03-31 22:56:01,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:56:01,227 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-03-31 22:56:01,227 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) [2023-03-31 22:56:01,229 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-03-31 22:56:01,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:56:01,231 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:01,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:56:01,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:56:01,232 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:01,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:01,233 INFO L85 PathProgramCache]: Analyzing trace with hash -2033787016, now seen corresponding path program 1 times [2023-03-31 22:56:01,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:01,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263688045] [2023-03-31 22:56:01,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:01,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:01,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:56:01,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263688045] [2023-03-31 22:56:01,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263688045] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:56:01,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:56:01,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 22:56:01,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249919741] [2023-03-31 22:56:01,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:56:01,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 22:56:01,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:56:01,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 22:56:01,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 22:56:01,433 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2023-03-31 22:56:01,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:56:01,478 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2023-03-31 22:56:01,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 22:56:01,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 11 [2023-03-31 22:56:01,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:56:01,480 INFO L225 Difference]: With dead ends: 37 [2023-03-31 22:56:01,481 INFO L226 Difference]: Without dead ends: 29 [2023-03-31 22:56:01,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:56:01,482 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:56:01,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 54 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:56:01,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-03-31 22:56:01,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-03-31 22:56:01,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:56:01,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-03-31 22:56:01,497 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2023-03-31 22:56:01,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:56:01,497 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-03-31 22:56:01,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2023-03-31 22:56:01,498 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-03-31 22:56:01,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-31 22:56:01,499 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:01,499 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:56:01,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:56:01,500 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:01,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:01,502 INFO L85 PathProgramCache]: Analyzing trace with hash -372045368, now seen corresponding path program 1 times [2023-03-31 22:56:01,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:01,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071908024] [2023-03-31 22:56:01,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:01,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:02,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:56:02,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071908024] [2023-03-31 22:56:02,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071908024] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:56:02,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562189212] [2023-03-31 22:56:02,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:02,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:02,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:56:02,381 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) [2023-03-31 22:56:02,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:56:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:02,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 49 conjunts are in the unsatisfiable core [2023-03-31 22:56:02,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:56:02,606 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 [2023-03-31 22:56:02,773 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 [2023-03-31 22:56:02,778 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 [2023-03-31 22:56:02,796 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-03-31 22:56:02,797 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 [2023-03-31 22:56:02,808 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 5 treesize of output 3 [2023-03-31 22:56:02,818 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 [2023-03-31 22:56:02,905 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-03-31 22:56:02,905 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 [2023-03-31 22:56:03,126 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2023-03-31 22:56:03,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 61 [2023-03-31 22:56:03,139 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 55 treesize of output 47 [2023-03-31 22:56:03,148 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 [2023-03-31 22:56:03,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:03,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:56:03,392 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:56:03,393 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 41 treesize of output 34 [2023-03-31 22:56:03,398 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 62 treesize of output 50 [2023-03-31 22:56:03,403 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 45 treesize of output 41 [2023-03-31 22:56:03,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562189212] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:56:03,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1943447501] [2023-03-31 22:56:03,466 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-03-31 22:56:03,466 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:56:03,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:56:03,473 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:56:03,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:56:03,523 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 22:56:03,983 INFO L197 IcfgInterpreter]: Interpreting procedure append_to_list with input of size 32 for LOIs [2023-03-31 22:56:03,999 INFO L197 IcfgInterpreter]: Interpreting procedure hash_fun with input of size 8 for LOIs [2023-03-31 22:56:04,001 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:56:04,005 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:56:08,269 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '307#(and (<= 0 |main_~#list~0.base|) (= |main_~#list~0.offset| 0) (exists ((|v_main_#t~mem11.offset_12| Int) (|v_main_#t~mem11.base_11| Int) (|v_main_#t~mem11.base_12| Int) (|v_main_#t~mem12_12| Int) (|v_main_#t~short13_10| Bool) (|v_main_#t~mem12_11| Int) (|v_main_#t~mem11.offset_11| Int)) (and (or (and (<= main_~base~0 (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |main_~#list~0.base|) |main_~#list~0.offset|)) (select (select |#memory_$Pointer$.offset| |main_~#list~0.base|) |main_~#list~0.offset|))) |v_main_#t~short13_10|) (and (not |v_main_#t~short13_10|) (< (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |main_~#list~0.base|) |main_~#list~0.offset|)) (select (select |#memory_$Pointer$.offset| |main_~#list~0.base|) |main_~#list~0.offset|)) main_~base~0))) (or (and (= (select (select |#memory_$Pointer$.base| |main_~#list~0.base|) |main_~#list~0.offset|) |v_main_#t~mem11.base_12|) (= (select (select |#memory_int| |v_main_#t~mem11.base_12|) |v_main_#t~mem11.offset_12|) |v_main_#t~mem12_12|) (<= (+ main_~base~0 100) |v_main_#t~mem12_12|) |v_main_#t~short13_10| (= (select (select |#memory_$Pointer$.offset| |main_~#list~0.base|) |main_~#list~0.offset|) |v_main_#t~mem11.offset_12|)) (and (= |v_main_#t~mem12_12| |v_main_#t~mem12_11|) (= |v_main_#t~mem11.offset_12| |v_main_#t~mem11.offset_11|) (= |v_main_#t~mem11.base_12| |v_main_#t~mem11.base_11|) (not |v_main_#t~short13_10|))))) (or (not (= (select (select |#memory_$Pointer$.offset| |main_~#list~0.base|) |main_~#list~0.offset|) 0)) (not (= (select (select |#memory_$Pointer$.base| |main_~#list~0.base|) |main_~#list~0.offset|) 0))) (<= 0 (+ main_~base~0 2147483648)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= main_~base~0 2147483647) (= |#NULL.base| 0))' at error location [2023-03-31 22:56:08,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:56:08,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:56:08,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2023-03-31 22:56:08,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935571980] [2023-03-31 22:56:08,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 22:56:08,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-31 22:56:08,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:56:08,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-31 22:56:08,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2023-03-31 22:56:08,273 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 13 states, 9 states have (on average 3.0) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 22:56:08,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:56:08,501 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-03-31 22:56:08,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 22:56:08,502 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 3.0) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 22 [2023-03-31 22:56:08,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:56:08,503 INFO L225 Difference]: With dead ends: 42 [2023-03-31 22:56:08,503 INFO L226 Difference]: Without dead ends: 40 [2023-03-31 22:56:08,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2023-03-31 22:56:08,505 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:56:08,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 95 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 22:56:08,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-03-31 22:56:08,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2023-03-31 22:56:08,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 22:56:08,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2023-03-31 22:56:08,512 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 22 [2023-03-31 22:56:08,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:56:08,513 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2023-03-31 22:56:08,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 3.0) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 22:56:08,513 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2023-03-31 22:56:08,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 22:56:08,514 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:08,514 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:56:08,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 22:56:08,719 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 [2023-03-31 22:56:08,720 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:08,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:08,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1498979964, now seen corresponding path program 1 times [2023-03-31 22:56:08,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:08,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595347072] [2023-03-31 22:56:08,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:08,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:09,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:09,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:56:09,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595347072] [2023-03-31 22:56:09,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595347072] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:56:09,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322180994] [2023-03-31 22:56:09,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:09,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:09,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:56:09,341 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) [2023-03-31 22:56:09,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:56:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:09,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 58 conjunts are in the unsatisfiable core [2023-03-31 22:56:09,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:56:09,497 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 [2023-03-31 22:56:09,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:09,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2023-03-31 22:56:09,690 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-03-31 22:56:09,690 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 [2023-03-31 22:56:09,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 33 [2023-03-31 22:56:09,801 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:56:09,802 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 1 case distinctions, treesize of input 42 treesize of output 32 [2023-03-31 22:56:09,808 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 26 treesize of output 21 [2023-03-31 22:56:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:09,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:56:10,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322180994] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:56:10,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1157266672] [2023-03-31 22:56:10,099 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-03-31 22:56:10,099 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:56:10,100 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:56:10,100 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:56:10,100 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:56:10,139 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 22:56:10,529 INFO L197 IcfgInterpreter]: Interpreting procedure append_to_list with input of size 32 for LOIs [2023-03-31 22:56:10,538 INFO L197 IcfgInterpreter]: Interpreting procedure hash_fun with input of size 8 for LOIs [2023-03-31 22:56:10,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:56:10,542 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:56:14,774 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '567#(and (<= 0 |main_~#list~0.base|) (= |main_~#list~0.offset| 0) (or (not (= (select (select |#memory_$Pointer$.offset| |main_~#list~0.base|) |main_~#list~0.offset|) 0)) (not (= (select (select |#memory_$Pointer$.base| |main_~#list~0.base|) |main_~#list~0.offset|) 0))) (<= 0 (+ main_~base~0 2147483648)) (= |#NULL.offset| 0) (exists ((|v_main_#t~short13_10| Bool) (|v_main_#t~mem11.offset_20| Int) (|v_main_#t~mem11.base_20| Int) (|v_main_#t~mem12_20| Int) (|v_main_#t~mem11.base_19| Int) (|v_main_#t~mem12_19| Int) (|v_main_#t~mem11.offset_19| Int)) (and (or (and (<= main_~base~0 (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |main_~#list~0.base|) |main_~#list~0.offset|)) (select (select |#memory_$Pointer$.offset| |main_~#list~0.base|) |main_~#list~0.offset|))) |v_main_#t~short13_10|) (and (not |v_main_#t~short13_10|) (< (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |main_~#list~0.base|) |main_~#list~0.offset|)) (select (select |#memory_$Pointer$.offset| |main_~#list~0.base|) |main_~#list~0.offset|)) main_~base~0))) (or (and (<= (+ main_~base~0 100) |v_main_#t~mem12_20|) |v_main_#t~short13_10| (= (select (select |#memory_$Pointer$.base| |main_~#list~0.base|) |main_~#list~0.offset|) |v_main_#t~mem11.base_20|) (= (select (select |#memory_$Pointer$.offset| |main_~#list~0.base|) |main_~#list~0.offset|) |v_main_#t~mem11.offset_20|) (= (select (select |#memory_int| |v_main_#t~mem11.base_20|) |v_main_#t~mem11.offset_20|) |v_main_#t~mem12_20|)) (and (not |v_main_#t~short13_10|) (= |v_main_#t~mem11.base_19| |v_main_#t~mem11.base_20|) (= |v_main_#t~mem11.offset_19| |v_main_#t~mem11.offset_20|) (= |v_main_#t~mem12_19| |v_main_#t~mem12_20|))))) (<= 0 |#StackHeapBarrier|) (<= main_~base~0 2147483647) (= |#NULL.base| 0))' at error location [2023-03-31 22:56:14,774 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:56:14,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:56:14,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2023-03-31 22:56:14,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353695341] [2023-03-31 22:56:14,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 22:56:14,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-31 22:56:14,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:56:14,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-31 22:56:14,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=826, Unknown=2, NotChecked=0, Total=930 [2023-03-31 22:56:14,776 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-31 22:56:15,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:56:15,053 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2023-03-31 22:56:15,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 22:56:15,053 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 26 [2023-03-31 22:56:15,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:56:15,054 INFO L225 Difference]: With dead ends: 51 [2023-03-31 22:56:15,054 INFO L226 Difference]: Without dead ends: 39 [2023-03-31 22:56:15,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=112, Invalid=942, Unknown=2, NotChecked=0, Total=1056 [2023-03-31 22:56:15,056 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 8 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:56:15,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 166 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 146 Invalid, 7 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 22:56:15,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-03-31 22:56:15,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2023-03-31 22:56:15,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.32) internal successors, (33), 27 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 22:56:15,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2023-03-31 22:56:15,064 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 26 [2023-03-31 22:56:15,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:56:15,064 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2023-03-31 22:56:15,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-31 22:56:15,064 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2023-03-31 22:56:15,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-03-31 22:56:15,065 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:15,065 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:56:15,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 22:56:15,271 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 [2023-03-31 22:56:15,271 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:15,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:15,272 INFO L85 PathProgramCache]: Analyzing trace with hash -202617480, now seen corresponding path program 2 times [2023-03-31 22:56:15,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:15,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405271080] [2023-03-31 22:56:15,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:15,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 22:56:15,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:56:15,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405271080] [2023-03-31 22:56:15,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405271080] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:56:15,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692445751] [2023-03-31 22:56:15,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 22:56:15,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:15,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:56:15,720 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) [2023-03-31 22:56:15,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 22:56:15,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 22:56:15,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 22:56:15,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 44 conjunts are in the unsatisfiable core [2023-03-31 22:56:15,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:56:15,942 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 [2023-03-31 22:56:15,947 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 [2023-03-31 22:56:15,966 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-03-31 22:56:15,966 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 [2023-03-31 22:56:15,972 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 5 treesize of output 3 [2023-03-31 22:56:15,978 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 [2023-03-31 22:56:16,107 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2023-03-31 22:56:16,108 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 86 treesize of output 61 [2023-03-31 22:56:16,116 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 56 treesize of output 48 [2023-03-31 22:56:16,124 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 7 treesize of output 3 [2023-03-31 22:56:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 22:56:16,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:56:16,351 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:56:16,352 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 41 treesize of output 34 [2023-03-31 22:56:16,359 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 62 treesize of output 50 [2023-03-31 22:56:16,364 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 45 treesize of output 41 [2023-03-31 22:56:16,425 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-03-31 22:56:16,425 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 18 treesize of output 1 [2023-03-31 22:56:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 22:56:16,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692445751] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:56:16,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1547152805] [2023-03-31 22:56:16,463 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-03-31 22:56:16,463 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:56:16,463 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:56:16,464 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:56:16,464 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:56:16,480 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 22:56:16,786 INFO L197 IcfgInterpreter]: Interpreting procedure append_to_list with input of size 32 for LOIs [2023-03-31 22:56:16,795 INFO L197 IcfgInterpreter]: Interpreting procedure hash_fun with input of size 8 for LOIs [2023-03-31 22:56:16,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:56:16,800 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:56:21,079 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '923#(and (<= 0 |main_~#list~0.base|) (exists ((|v_main_#t~mem12_26| Int) (|v_main_#t~mem11.offset_25| Int) (|v_main_#t~mem11.offset_26| Int) (|v_main_#t~mem12_25| Int) (|v_main_#t~short13_10| Bool) (|v_main_#t~mem11.base_26| Int) (|v_main_#t~mem11.base_25| Int)) (and (or (and (<= main_~base~0 (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |main_~#list~0.base|) |main_~#list~0.offset|)) (select (select |#memory_$Pointer$.offset| |main_~#list~0.base|) |main_~#list~0.offset|))) |v_main_#t~short13_10|) (and (not |v_main_#t~short13_10|) (< (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |main_~#list~0.base|) |main_~#list~0.offset|)) (select (select |#memory_$Pointer$.offset| |main_~#list~0.base|) |main_~#list~0.offset|)) main_~base~0))) (or (and (= (select (select |#memory_$Pointer$.base| |main_~#list~0.base|) |main_~#list~0.offset|) |v_main_#t~mem11.base_26|) (<= (+ main_~base~0 100) |v_main_#t~mem12_26|) |v_main_#t~short13_10| (= (select (select |#memory_$Pointer$.offset| |main_~#list~0.base|) |main_~#list~0.offset|) |v_main_#t~mem11.offset_26|) (= (select (select |#memory_int| |v_main_#t~mem11.base_26|) |v_main_#t~mem11.offset_26|) |v_main_#t~mem12_26|)) (and (= |v_main_#t~mem12_26| |v_main_#t~mem12_25|) (= |v_main_#t~mem11.offset_26| |v_main_#t~mem11.offset_25|) (not |v_main_#t~short13_10|) (= |v_main_#t~mem11.base_26| |v_main_#t~mem11.base_25|))))) (= |main_~#list~0.offset| 0) (or (not (= (select (select |#memory_$Pointer$.offset| |main_~#list~0.base|) |main_~#list~0.offset|) 0)) (not (= (select (select |#memory_$Pointer$.base| |main_~#list~0.base|) |main_~#list~0.offset|) 0))) (<= 0 (+ main_~base~0 2147483648)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= main_~base~0 2147483647) (= |#NULL.base| 0))' at error location [2023-03-31 22:56:21,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:56:21,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:56:21,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-03-31 22:56:21,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659164735] [2023-03-31 22:56:21,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:56:21,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 22:56:21,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:56:21,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 22:56:21,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2023-03-31 22:56:21,081 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 14 states, 9 states have (on average 4.444444444444445) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-03-31 22:56:21,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:56:21,363 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2023-03-31 22:56:21,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 22:56:21,364 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 4.444444444444445) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 33 [2023-03-31 22:56:21,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:56:21,365 INFO L225 Difference]: With dead ends: 63 [2023-03-31 22:56:21,365 INFO L226 Difference]: Without dead ends: 61 [2023-03-31 22:56:21,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2023-03-31 22:56:21,366 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 74 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:56:21,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 108 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 22:56:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-03-31 22:56:21,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 40. [2023-03-31 22:56:21,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 30 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 22:56:21,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2023-03-31 22:56:21,375 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 33 [2023-03-31 22:56:21,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:56:21,375 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2023-03-31 22:56:21,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 4.444444444444445) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-03-31 22:56:21,376 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2023-03-31 22:56:21,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-03-31 22:56:21,376 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:21,377 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:56:21,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 22:56:21,584 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 [2023-03-31 22:56:21,584 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:21,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:21,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1757973036, now seen corresponding path program 2 times [2023-03-31 22:56:21,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:21,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584883977] [2023-03-31 22:56:21,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:21,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:23,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 22:56:23,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:56:23,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584883977] [2023-03-31 22:56:23,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584883977] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:56:23,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695890504] [2023-03-31 22:56:23,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 22:56:23,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:23,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:56:23,197 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) [2023-03-31 22:56:23,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 22:56:23,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 22:56:23,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 22:56:23,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 110 conjunts are in the unsatisfiable core [2023-03-31 22:56:23,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:56:23,388 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 [2023-03-31 22:56:23,564 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 5 treesize of output 3 [2023-03-31 22:56:23,579 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 [2023-03-31 22:56:23,584 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 [2023-03-31 22:56:23,608 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-03-31 22:56:23,609 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 [2023-03-31 22:56:23,614 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 5 treesize of output 3 [2023-03-31 22:56:23,624 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 [2023-03-31 22:56:23,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:23,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 25 treesize of output 21 [2023-03-31 22:56:24,035 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 17 treesize of output 9 [2023-03-31 22:56:24,041 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 7 treesize of output 3 [2023-03-31 22:56:24,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:24,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 22:56:24,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:24,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:24,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:24,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-03-31 22:56:24,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:24,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 48 [2023-03-31 22:56:24,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:24,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 33 [2023-03-31 22:56:24,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:24,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:24,213 INFO L321 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-03-31 22:56:24,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 26 [2023-03-31 22:56:24,377 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:56:24,378 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 1 case distinctions, treesize of input 101 treesize of output 55 [2023-03-31 22:56:24,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:24,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2023-03-31 22:56:24,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:24,394 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 26 treesize of output 21 [2023-03-31 22:56:24,553 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2023-03-31 22:56:24,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 61 [2023-03-31 22:56:24,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:24,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 55 [2023-03-31 22:56:24,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:24,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-03-31 22:56:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:24,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:56:27,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695890504] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:56:27,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1440655134] [2023-03-31 22:56:27,259 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-03-31 22:56:27,260 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:56:27,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:56:27,260 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:56:27,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:56:27,283 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 22:56:27,608 INFO L197 IcfgInterpreter]: Interpreting procedure append_to_list with input of size 32 for LOIs [2023-03-31 22:56:27,616 INFO L197 IcfgInterpreter]: Interpreting procedure hash_fun with input of size 8 for LOIs [2023-03-31 22:56:27,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:56:27,621 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:56:32,477 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1256#(and (<= 0 |main_~#list~0.base|) (= |main_~#list~0.offset| 0) (or (not (= (select (select |#memory_$Pointer$.offset| |main_~#list~0.base|) |main_~#list~0.offset|) 0)) (not (= (select (select |#memory_$Pointer$.base| |main_~#list~0.base|) |main_~#list~0.offset|) 0))) (<= 0 (+ main_~base~0 2147483648)) (= |#NULL.offset| 0) (exists ((|v_main_#t~mem11.offset_34| Int) (|v_main_#t~mem11.offset_35| Int) (|v_main_#t~mem11.base_35| Int) (|v_main_#t~mem11.base_34| Int) (|v_main_#t~mem12_35| Int) (|v_main_#t~short13_10| Bool) (|v_main_#t~mem12_34| Int)) (and (or (and (= (select (select |#memory_$Pointer$.base| |main_~#list~0.base|) |main_~#list~0.offset|) |v_main_#t~mem11.base_35|) (<= (+ main_~base~0 100) |v_main_#t~mem12_35|) (= (select (select |#memory_int| |v_main_#t~mem11.base_35|) |v_main_#t~mem11.offset_35|) |v_main_#t~mem12_35|) |v_main_#t~short13_10| (= (select (select |#memory_$Pointer$.offset| |main_~#list~0.base|) |main_~#list~0.offset|) |v_main_#t~mem11.offset_35|)) (and (not |v_main_#t~short13_10|) (= |v_main_#t~mem11.offset_35| |v_main_#t~mem11.offset_34|) (= |v_main_#t~mem12_35| |v_main_#t~mem12_34|) (= |v_main_#t~mem11.base_35| |v_main_#t~mem11.base_34|))) (or (and (<= main_~base~0 (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |main_~#list~0.base|) |main_~#list~0.offset|)) (select (select |#memory_$Pointer$.offset| |main_~#list~0.base|) |main_~#list~0.offset|))) |v_main_#t~short13_10|) (and (not |v_main_#t~short13_10|) (< (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |main_~#list~0.base|) |main_~#list~0.offset|)) (select (select |#memory_$Pointer$.offset| |main_~#list~0.base|) |main_~#list~0.offset|)) main_~base~0))))) (<= 0 |#StackHeapBarrier|) (<= main_~base~0 2147483647) (= |#NULL.base| 0))' at error location [2023-03-31 22:56:32,477 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:56:32,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:56:32,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2023-03-31 22:56:32,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830014776] [2023-03-31 22:56:32,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 22:56:32,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-03-31 22:56:32,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:56:32,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-03-31 22:56:32,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1566, Unknown=7, NotChecked=0, Total=1722 [2023-03-31 22:56:32,480 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 22 states, 16 states have (on average 3.0) internal successors, (48), 20 states have internal predecessors, (48), 7 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-03-31 22:56:33,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:56:33,967 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2023-03-31 22:56:33,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-03-31 22:56:33,968 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 3.0) internal successors, (48), 20 states have internal predecessors, (48), 7 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 37 [2023-03-31 22:56:33,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:56:33,969 INFO L225 Difference]: With dead ends: 74 [2023-03-31 22:56:33,969 INFO L226 Difference]: Without dead ends: 72 [2023-03-31 22:56:33,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=363, Invalid=3052, Unknown=7, NotChecked=0, Total=3422 [2023-03-31 22:56:33,974 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 66 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 22:56:33,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 201 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 22:56:33,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-03-31 22:56:33,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2023-03-31 22:56:33,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 22:56:33,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2023-03-31 22:56:33,985 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 37 [2023-03-31 22:56:33,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:56:33,985 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2023-03-31 22:56:33,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 3.0) internal successors, (48), 20 states have internal predecessors, (48), 7 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-03-31 22:56:33,985 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2023-03-31 22:56:33,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-03-31 22:56:33,986 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:33,986 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:56:33,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 22:56:34,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:34,200 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:34,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:34,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1729055968, now seen corresponding path program 3 times [2023-03-31 22:56:34,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:34,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235404946] [2023-03-31 22:56:34,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:34,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 22:56:35,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:56:35,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235404946] [2023-03-31 22:56:35,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235404946] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:56:35,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249037605] [2023-03-31 22:56:35,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 22:56:35,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:35,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:56:35,609 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:56:35,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 22:56:35,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 22:56:35,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 22:56:35,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 99 conjunts are in the unsatisfiable core [2023-03-31 22:56:35,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:56:36,035 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 7 treesize of output 3 [2023-03-31 22:56:36,039 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 7 treesize of output 3 [2023-03-31 22:56:36,070 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 [2023-03-31 22:56:36,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:36,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2023-03-31 22:56:36,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:36,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2023-03-31 22:56:36,454 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:56:36,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 22 [2023-03-31 22:56:36,460 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 5 treesize of output 3 [2023-03-31 22:56:36,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:36,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-03-31 22:56:36,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:36,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:36,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:36,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 39 [2023-03-31 22:56:36,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:36,604 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-03-31 22:56:36,605 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 2 case distinctions, treesize of input 82 treesize of output 52 [2023-03-31 22:56:36,621 INFO L321 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-03-31 22:56:36,621 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 23 treesize of output 23 [2023-03-31 22:56:36,811 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-03-31 22:56:36,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 59 [2023-03-31 22:56:36,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:36,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:36,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2023-03-31 22:56:37,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:37,014 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-03-31 22:56:37,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 47 [2023-03-31 22:56:37,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:37,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:37,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2023-03-31 22:56:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:37,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:56:37,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249037605] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:56:37,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [98984092] [2023-03-31 22:56:37,695 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-03-31 22:56:37,695 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:56:37,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:56:37,695 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:56:37,695 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:56:37,709 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 22:56:38,008 INFO L197 IcfgInterpreter]: Interpreting procedure append_to_list with input of size 32 for LOIs [2023-03-31 22:56:38,018 INFO L197 IcfgInterpreter]: Interpreting procedure hash_fun with input of size 8 for LOIs [2023-03-31 22:56:38,019 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:56:38,022 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:56:42,863 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1664#(and (<= 0 |main_~#list~0.base|) (= |main_~#list~0.offset| 0) (exists ((|v_main_#t~mem11.offset_45| Int) (|v_main_#t~mem11.offset_46| Int) (|v_main_#t~mem11.base_46| Int) (|v_main_#t~mem11.base_45| Int) (|v_main_#t~mem12_46| Int) (|v_main_#t~short13_10| Bool) (|v_main_#t~mem12_45| Int)) (and (or (and (= |v_main_#t~mem11.offset_46| |v_main_#t~mem11.offset_45|) (not |v_main_#t~short13_10|) (= |v_main_#t~mem12_46| |v_main_#t~mem12_45|) (= |v_main_#t~mem11.base_46| |v_main_#t~mem11.base_45|)) (and (<= (+ main_~base~0 100) |v_main_#t~mem12_46|) (= (select (select |#memory_$Pointer$.base| |main_~#list~0.base|) |main_~#list~0.offset|) |v_main_#t~mem11.base_46|) |v_main_#t~short13_10| (= (select (select |#memory_int| |v_main_#t~mem11.base_46|) |v_main_#t~mem11.offset_46|) |v_main_#t~mem12_46|) (= (select (select |#memory_$Pointer$.offset| |main_~#list~0.base|) |main_~#list~0.offset|) |v_main_#t~mem11.offset_46|))) (or (and (<= main_~base~0 (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |main_~#list~0.base|) |main_~#list~0.offset|)) (select (select |#memory_$Pointer$.offset| |main_~#list~0.base|) |main_~#list~0.offset|))) |v_main_#t~short13_10|) (and (not |v_main_#t~short13_10|) (< (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |main_~#list~0.base|) |main_~#list~0.offset|)) (select (select |#memory_$Pointer$.offset| |main_~#list~0.base|) |main_~#list~0.offset|)) main_~base~0))))) (or (not (= (select (select |#memory_$Pointer$.offset| |main_~#list~0.base|) |main_~#list~0.offset|) 0)) (not (= (select (select |#memory_$Pointer$.base| |main_~#list~0.base|) |main_~#list~0.offset|) 0))) (<= 0 (+ main_~base~0 2147483648)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= main_~base~0 2147483647) (= |#NULL.base| 0))' at error location [2023-03-31 22:56:42,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:56:42,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:56:42,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2023-03-31 22:56:42,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721500783] [2023-03-31 22:56:42,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 22:56:42,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-03-31 22:56:42,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:56:42,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-03-31 22:56:42,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1500, Unknown=4, NotChecked=0, Total=1640 [2023-03-31 22:56:42,866 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 21 states, 17 states have (on average 3.235294117647059) internal successors, (55), 19 states have internal predecessors, (55), 5 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2023-03-31 22:56:43,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:56:43,687 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2023-03-31 22:56:43,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 22:56:43,687 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 3.235294117647059) internal successors, (55), 19 states have internal predecessors, (55), 5 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) Word has length 41 [2023-03-31 22:56:43,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:56:43,688 INFO L225 Difference]: With dead ends: 73 [2023-03-31 22:56:43,688 INFO L226 Difference]: Without dead ends: 57 [2023-03-31 22:56:43,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=165, Invalid=1901, Unknown=4, NotChecked=0, Total=2070 [2023-03-31 22:56:43,689 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 42 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 22:56:43,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 353 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 22:56:43,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-03-31 22:56:43,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2023-03-31 22:56:43,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 42 states have internal predecessors, (49), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 22:56:43,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2023-03-31 22:56:43,702 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 41 [2023-03-31 22:56:43,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:56:43,702 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2023-03-31 22:56:43,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 3.235294117647059) internal successors, (55), 19 states have internal predecessors, (55), 5 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2023-03-31 22:56:43,703 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2023-03-31 22:56:43,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-03-31 22:56:43,704 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:43,704 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:56:43,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 22:56:43,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:43,909 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:43,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:43,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1498117328, now seen corresponding path program 4 times [2023-03-31 22:56:43,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:43,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225086891] [2023-03-31 22:56:43,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:43,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:47,021 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 22:56:47,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:56:47,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225086891] [2023-03-31 22:56:47,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225086891] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:56:47,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169817856] [2023-03-31 22:56:47,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 22:56:47,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:47,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:56:47,022 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:56:47,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 22:56:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:47,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 161 conjunts are in the unsatisfiable core [2023-03-31 22:56:47,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:56:47,198 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 [2023-03-31 22:56:47,452 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 5 treesize of output 3 [2023-03-31 22:56:47,489 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 [2023-03-31 22:56:47,493 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 [2023-03-31 22:56:47,515 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-03-31 22:56:47,515 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 [2023-03-31 22:56:47,520 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 5 treesize of output 3 [2023-03-31 22:56:47,530 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 [2023-03-31 22:56:47,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:47,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 25 treesize of output 21 [2023-03-31 22:56:47,935 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 17 treesize of output 9 [2023-03-31 22:56:47,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:47,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 22:56:47,943 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 7 treesize of output 3 [2023-03-31 22:56:48,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:48,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:48,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:48,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-03-31 22:56:48,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:48,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 46 [2023-03-31 22:56:48,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:48,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 33 [2023-03-31 22:56:48,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:48,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:48,154 INFO L321 Elim1Store]: treesize reduction 50, result has 37.5 percent of original size [2023-03-31 22:56:48,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 53 [2023-03-31 22:56:48,695 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:56:48,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 31 [2023-03-31 22:56:48,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:48,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:48,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2023-03-31 22:56:48,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:48,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-03-31 22:56:48,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:48,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:48,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:48,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2023-03-31 22:56:48,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:48,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:48,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:48,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 39 [2023-03-31 22:56:48,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:48,951 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-03-31 22:56:48,951 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 2 case distinctions, treesize of input 145 treesize of output 79 [2023-03-31 22:56:48,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:48,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:48,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:48,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:48,980 INFO L321 Elim1Store]: treesize reduction 4, result has 83.3 percent of original size [2023-03-31 22:56:48,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 33 [2023-03-31 22:56:49,214 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-03-31 22:56:49,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 81 [2023-03-31 22:56:49,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:49,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2023-03-31 22:56:49,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:49,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:49,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:49,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2023-03-31 22:56:49,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:49,525 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-03-31 22:56:49,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 143 treesize of output 94 [2023-03-31 22:56:49,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:49,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2023-03-31 22:56:49,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:49,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:49,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:49,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2023-03-31 22:56:49,827 INFO L321 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2023-03-31 22:56:49,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 61 [2023-03-31 22:56:49,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:49,845 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-03-31 22:56:49,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 123 treesize of output 78 [2023-03-31 22:56:49,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:49,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:56:49,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-03-31 22:56:49,879 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 22:56:49,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:56:49,953 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_main_~#list~0.base|) |c_main_~#list~0.offset|)) (.cse3 (+ (select (select |c_#memory_$Pointer$.offset| |c_main_~#list~0.base|) |c_main_~#list~0.offset|) 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| .cse2) .cse3)) (.cse1 (select (select |c_#memory_$Pointer$.offset| .cse2) .cse3))) (and (forall ((v_ArrVal_738 (Array Int Int))) (< c_main_~base~0 (+ (select (select (store |c_#memory_int| |c_main_~#list~0.base| v_ArrVal_738) .cse0) .cse1) 1))) (forall ((v_ArrVal_738 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_main_~#list~0.base| v_ArrVal_738) .cse0) .cse1) (+ c_main_~base~0 100)))))) is different from false [2023-03-31 22:56:49,986 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_$Pointer$.offset| |c_main_~#list~0.base|)) (.cse6 (select |c_#memory_$Pointer$.base| |c_main_~#list~0.base|))) (let ((.cse7 (select .cse6 |c_main_~#list~0.offset|)) (.cse8 (+ (select .cse2 |c_main_~#list~0.offset|) 4))) (let ((.cse3 (select (select |c_#memory_$Pointer$.offset| .cse7) .cse8))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| .cse7) .cse8)) (.cse5 (+ .cse3 4))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |c_main_~#list~0.base| (store .cse6 |c_main_~#list~0.offset| .cse4)) .cse4) .cse5)) (.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_main_~#list~0.base| (store .cse2 |c_main_~#list~0.offset| .cse3)) .cse4) .cse5))) (and (forall ((v_ArrVal_738 (Array Int Int))) (< c_main_~base~0 (+ (select (select (store |c_#memory_int| |c_main_~#list~0.base| v_ArrVal_738) .cse0) .cse1) 1))) (forall ((v_ArrVal_738 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_main_~#list~0.base| v_ArrVal_738) .cse0) .cse1) (+ c_main_~base~0 100))))))))) is different from false [2023-03-31 22:56:50,225 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse7 (select (select |c_#memory_$Pointer$.base| |c_main_~#list~0.base|) |c_main_~#list~0.offset|)) (.cse8 (select (select |c_#memory_$Pointer$.offset| |c_main_~#list~0.base|) |c_main_~#list~0.offset|))) (and (forall ((v_append_to_list_~node~0.base_25 Int)) (or (not (= (select |c_#valid| v_append_to_list_~node~0.base_25) 0)) (forall ((v_ArrVal_738 (Array Int Int)) (v_ArrVal_760 (Array Int Int)) (v_ArrVal_758 Int) (v_ArrVal_757 Int)) (< (let ((.cse4 (store |c_#memory_$Pointer$.offset| v_append_to_list_~node~0.base_25 (store (store (select |c_#memory_$Pointer$.offset| v_append_to_list_~node~0.base_25) 4 .cse8) 0 v_ArrVal_758)))) (let ((.cse0 (store |c_#memory_$Pointer$.base| v_append_to_list_~node~0.base_25 (store (store (select |c_#memory_$Pointer$.base| v_append_to_list_~node~0.base_25) 4 .cse7) 0 v_ArrVal_757))) (.cse5 (select .cse4 |c_main_~#list~0.base|))) (let ((.cse6 (select (select (store .cse4 |c_main_~#list~0.base| (store .cse5 |c_main_~#list~0.offset| 0)) v_append_to_list_~node~0.base_25) 4)) (.cse1 (select .cse0 |c_main_~#list~0.base|))) (let ((.cse2 (select (select (store .cse0 |c_main_~#list~0.base| (store .cse1 |c_main_~#list~0.offset| v_append_to_list_~node~0.base_25)) v_append_to_list_~node~0.base_25) 4)) (.cse3 (+ .cse6 4))) (select (select (store (store |c_#memory_int| v_append_to_list_~node~0.base_25 v_ArrVal_760) |c_main_~#list~0.base| v_ArrVal_738) (select (select (store .cse0 |c_main_~#list~0.base| (store .cse1 |c_main_~#list~0.offset| .cse2)) .cse2) .cse3)) (select (select (store .cse4 |c_main_~#list~0.base| (store .cse5 |c_main_~#list~0.offset| .cse6)) .cse2) .cse3)))))) (+ c_main_~base~0 100))) (<= |c_#StackHeapBarrier| v_append_to_list_~node~0.base_25))) (forall ((v_append_to_list_~node~0.base_25 Int)) (or (forall ((v_ArrVal_738 (Array Int Int)) (v_ArrVal_760 (Array Int Int)) (v_ArrVal_758 Int) (v_ArrVal_757 Int)) (< c_main_~base~0 (+ (let ((.cse13 (store |c_#memory_$Pointer$.offset| v_append_to_list_~node~0.base_25 (store (store (select |c_#memory_$Pointer$.offset| v_append_to_list_~node~0.base_25) 4 .cse8) 0 v_ArrVal_758)))) (let ((.cse9 (store |c_#memory_$Pointer$.base| v_append_to_list_~node~0.base_25 (store (store (select |c_#memory_$Pointer$.base| v_append_to_list_~node~0.base_25) 4 .cse7) 0 v_ArrVal_757))) (.cse14 (select .cse13 |c_main_~#list~0.base|))) (let ((.cse15 (select (select (store .cse13 |c_main_~#list~0.base| (store .cse14 |c_main_~#list~0.offset| 0)) v_append_to_list_~node~0.base_25) 4)) (.cse10 (select .cse9 |c_main_~#list~0.base|))) (let ((.cse11 (select (select (store .cse9 |c_main_~#list~0.base| (store .cse10 |c_main_~#list~0.offset| v_append_to_list_~node~0.base_25)) v_append_to_list_~node~0.base_25) 4)) (.cse12 (+ .cse15 4))) (select (select (store (store |c_#memory_int| v_append_to_list_~node~0.base_25 v_ArrVal_760) |c_main_~#list~0.base| v_ArrVal_738) (select (select (store .cse9 |c_main_~#list~0.base| (store .cse10 |c_main_~#list~0.offset| .cse11)) .cse11) .cse12)) (select (select (store .cse13 |c_main_~#list~0.base| (store .cse14 |c_main_~#list~0.offset| .cse15)) .cse11) .cse12)))))) 1))) (not (= (select |c_#valid| v_append_to_list_~node~0.base_25) 0)) (<= |c_#StackHeapBarrier| v_append_to_list_~node~0.base_25))))) is different from false [2023-03-31 22:56:50,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169817856] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:56:50,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [838363516] [2023-03-31 22:56:50,255 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-03-31 22:56:50,255 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:56:50,255 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:56:50,255 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:56:50,256 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:56:50,272 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 22:56:50,574 INFO L197 IcfgInterpreter]: Interpreting procedure append_to_list with input of size 32 for LOIs [2023-03-31 22:56:50,583 INFO L197 IcfgInterpreter]: Interpreting procedure hash_fun with input of size 8 for LOIs [2023-03-31 22:56:50,585 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:56:50,587 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:56:55,171 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2104#(and (<= 0 |main_~#list~0.base|) (= |main_~#list~0.offset| 0) (or (not (= (select (select |#memory_$Pointer$.offset| |main_~#list~0.base|) |main_~#list~0.offset|) 0)) (not (= (select (select |#memory_$Pointer$.base| |main_~#list~0.base|) |main_~#list~0.offset|) 0))) (<= 0 (+ main_~base~0 2147483648)) (exists ((|v_main_#t~mem11.offset_57| Int) (|v_main_#t~mem11.offset_58| Int) (|v_main_#t~mem11.base_57| Int) (|v_main_#t~mem12_58| Int) (|v_main_#t~mem12_57| Int) (|v_main_#t~short13_10| Bool) (|v_main_#t~mem11.base_58| Int)) (and (or (and (= (select (select |#memory_$Pointer$.offset| |main_~#list~0.base|) |main_~#list~0.offset|) |v_main_#t~mem11.offset_58|) (= (select (select |#memory_int| |v_main_#t~mem11.base_58|) |v_main_#t~mem11.offset_58|) |v_main_#t~mem12_58|) |v_main_#t~short13_10| (= (select (select |#memory_$Pointer$.base| |main_~#list~0.base|) |main_~#list~0.offset|) |v_main_#t~mem11.base_58|) (<= (+ main_~base~0 100) |v_main_#t~mem12_58|)) (and (not |v_main_#t~short13_10|) (= |v_main_#t~mem11.offset_58| |v_main_#t~mem11.offset_57|) (= |v_main_#t~mem12_58| |v_main_#t~mem12_57|) (= |v_main_#t~mem11.base_58| |v_main_#t~mem11.base_57|))) (or (and (<= main_~base~0 (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |main_~#list~0.base|) |main_~#list~0.offset|)) (select (select |#memory_$Pointer$.offset| |main_~#list~0.base|) |main_~#list~0.offset|))) |v_main_#t~short13_10|) (and (not |v_main_#t~short13_10|) (< (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |main_~#list~0.base|) |main_~#list~0.offset|)) (select (select |#memory_$Pointer$.offset| |main_~#list~0.base|) |main_~#list~0.offset|)) main_~base~0))))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= main_~base~0 2147483647) (= |#NULL.base| 0))' at error location [2023-03-31 22:56:55,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:56:55,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:56:55,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 29 [2023-03-31 22:56:55,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080523048] [2023-03-31 22:56:55,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 22:56:55,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-03-31 22:56:55,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:56:55,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-03-31 22:56:55,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1993, Unknown=5, NotChecked=276, Total=2450 [2023-03-31 22:56:55,173 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 29 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 27 states have internal predecessors, (69), 9 states have call successors, (14), 6 states have call predecessors, (14), 10 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2023-03-31 22:56:58,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:56:58,503 INFO L93 Difference]: Finished difference Result 98 states and 117 transitions. [2023-03-31 22:56:58,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-03-31 22:56:58,504 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 27 states have internal predecessors, (69), 9 states have call successors, (14), 6 states have call predecessors, (14), 10 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) Word has length 52 [2023-03-31 22:56:58,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:56:58,505 INFO L225 Difference]: With dead ends: 98 [2023-03-31 22:56:58,505 INFO L226 Difference]: Without dead ends: 96 [2023-03-31 22:56:58,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=562, Invalid=4847, Unknown=5, NotChecked=438, Total=5852 [2023-03-31 22:56:58,507 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 166 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 26 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:56:58,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 304 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 761 Invalid, 5 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 22:56:58,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-03-31 22:56:58,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 61. [2023-03-31 22:56:58,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 47 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 22:56:58,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-03-31 22:56:58,523 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 52 [2023-03-31 22:56:58,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:56:58,523 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-03-31 22:56:58,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 27 states have internal predecessors, (69), 9 states have call successors, (14), 6 states have call predecessors, (14), 10 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2023-03-31 22:56:58,523 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-03-31 22:56:58,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-03-31 22:56:58,524 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:58,524 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:56:58,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 22:56:58,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:58,728 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:58,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:58,729 INFO L85 PathProgramCache]: Analyzing trace with hash -582276124, now seen corresponding path program 5 times [2023-03-31 22:56:58,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:58,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644052910] [2023-03-31 22:56:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:58,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat