/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 EqDomain -i ../sv-benchmarks/c/list-simple/dll2c_update_all.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:57:17,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:57:17,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:57:17,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:57:17,285 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:57:17,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:57:17,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:57:17,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:57:17,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:57:17,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:57:17,297 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:57:17,298 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:57:17,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:57:17,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:57:17,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:57:17,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:57:17,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:57:17,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:57:17,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:57:17,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:57:17,305 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:57:17,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:57:17,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:57:17,309 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:57:17,312 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:57:17,312 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:57:17,312 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:57:17,313 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:57:17,313 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:57:17,314 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:57:17,314 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:57:17,315 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:57:17,315 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:57:17,316 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:57:17,317 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:57:17,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:57:17,317 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:57:17,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:57:17,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:57:17,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:57:17,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:57:17,328 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 10:57:17,347 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:57:17,348 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:57:17,348 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:57:17,348 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:57:17,348 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:57:17,349 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:57:17,349 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:57:17,349 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:57:17,349 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:57:17,349 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:57:17,349 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:57:17,349 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:57:17,349 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:57:17,349 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:57:17,350 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:57:17,350 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:57:17,350 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:57:17,350 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:57:17,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:57:17,351 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:57:17,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:57:17,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:57:17,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:57:17,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:57:17,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:57:17,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:57:17,351 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:57:17,351 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:57:17,352 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:57:17,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:57:17,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:57:17,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:57:17,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:57:17,352 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:57:17,352 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:57:17,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:57:17,353 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:57:17,353 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:57:17,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:57:17,353 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:57:17,353 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:57:17,353 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:57:17,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:57:17,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:57:17,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:57:17,543 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:57:17,543 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:57:17,544 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_update_all.i [2023-04-01 10:57:18,558 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:57:18,807 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:57:18,808 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_update_all.i [2023-04-01 10:57:18,816 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53d9f0e72/6dff3542c68f4f6dac6ce7ba3a7c9cb1/FLAG691b23f1f [2023-04-01 10:57:19,147 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53d9f0e72/6dff3542c68f4f6dac6ce7ba3a7c9cb1 [2023-04-01 10:57:19,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:57:19,150 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:57:19,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:57:19,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:57:19,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:57:19,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:57:19" (1/1) ... [2023-04-01 10:57:19,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f880a92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:19, skipping insertion in model container [2023-04-01 10:57:19,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:57:19" (1/1) ... [2023-04-01 10:57:19,161 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:57:19,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:57:19,390 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/list-simple/dll2c_update_all.i[24538,24551] [2023-04-01 10:57:19,396 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:57:19,407 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:57:19,446 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/list-simple/dll2c_update_all.i[24538,24551] [2023-04-01 10:57:19,447 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:57:19,467 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:57:19,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:19 WrapperNode [2023-04-01 10:57:19,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:57:19,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:57:19,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:57:19,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:57:19,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:19" (1/1) ... [2023-04-01 10:57:19,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:19" (1/1) ... [2023-04-01 10:57:19,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:19" (1/1) ... [2023-04-01 10:57:19,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:19" (1/1) ... [2023-04-01 10:57:19,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:19" (1/1) ... [2023-04-01 10:57:19,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:19" (1/1) ... [2023-04-01 10:57:19,516 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:19" (1/1) ... [2023-04-01 10:57:19,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:19" (1/1) ... [2023-04-01 10:57:19,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:57:19,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:57:19,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:57:19,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:57:19,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:19" (1/1) ... [2023-04-01 10:57:19,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:57:19,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:57:19,555 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 10:57:19,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 10:57:19,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:57:19,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:57:19,581 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:57:19,581 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-01 10:57:19,581 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-01 10:57:19,581 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-04-01 10:57:19,581 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-04-01 10:57:19,581 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2023-04-01 10:57:19,581 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_destroy [2023-04-01 10:57:19,581 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_get_data_at [2023-04-01 10:57:19,581 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_update_at [2023-04-01 10:57:19,581 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:57:19,582 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:57:19,582 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:57:19,582 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 10:57:19,582 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 10:57:19,582 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:57:19,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:57:19,582 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-01 10:57:19,582 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-01 10:57:19,582 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-01 10:57:19,582 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-01 10:57:19,582 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-01 10:57:19,582 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-01 10:57:19,582 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-01 10:57:19,582 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-01 10:57:19,583 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-01 10:57:19,583 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-01 10:57:19,583 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-01 10:57:19,583 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-01 10:57:19,583 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-01 10:57:19,583 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-01 10:57:19,583 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-01 10:57:19,583 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-01 10:57:19,583 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-01 10:57:19,583 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-01 10:57:19,583 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-01 10:57:19,583 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-01 10:57:19,583 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-01 10:57:19,583 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-01 10:57:19,583 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-01 10:57:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-01 10:57:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-01 10:57:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-01 10:57:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-01 10:57:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-01 10:57:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-01 10:57:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-01 10:57:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-01 10:57:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-01 10:57:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-01 10:57:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-01 10:57:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-01 10:57:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-01 10:57:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-01 10:57:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-01 10:57:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-01 10:57:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-01 10:57:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-01 10:57:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-01 10:57:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-01 10:57:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-01 10:57:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-01 10:57:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-01 10:57:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-01 10:57:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-01 10:57:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-01 10:57:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-01 10:57:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-01 10:57:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-01 10:57:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 10:57:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 10:57:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-01 10:57:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 10:57:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-01 10:57:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-01 10:57:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-01 10:57:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-01 10:57:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-01 10:57:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-01 10:57:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-01 10:57:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-01 10:57:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:57:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-01 10:57:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-01 10:57:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-01 10:57:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-01 10:57:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-01 10:57:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-01 10:57:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-01 10:57:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-01 10:57:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-01 10:57:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-01 10:57:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-01 10:57:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-01 10:57:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-01 10:57:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-01 10:57:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-01 10:57:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-01 10:57:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-01 10:57:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-01 10:57:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-01 10:57:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-01 10:57:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-01 10:57:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-01 10:57:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-01 10:57:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-01 10:57:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-01 10:57:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-01 10:57:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-01 10:57:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-01 10:57:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-01 10:57:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-01 10:57:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-01 10:57:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-01 10:57:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-01 10:57:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-01 10:57:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-01 10:57:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-01 10:57:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-01 10:57:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-01 10:57:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-01 10:57:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-04-01 10:57:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-04-01 10:57:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 10:57:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 10:57:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:57:19,590 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2023-04-01 10:57:19,590 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_destroy [2023-04-01 10:57:19,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 10:57:19,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:57:19,590 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_get_data_at [2023-04-01 10:57:19,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:57:19,590 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_update_at [2023-04-01 10:57:19,590 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:57:19,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:57:19,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:57:19,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:57:19,808 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:57:19,810 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:57:19,907 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-04-01 10:57:20,000 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:57:20,049 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:57:20,049 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-04-01 10:57:20,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:57:20 BoogieIcfgContainer [2023-04-01 10:57:20,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:57:20,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:57:20,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:57:20,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:57:20,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:57:19" (1/3) ... [2023-04-01 10:57:20,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aeeef93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:57:20, skipping insertion in model container [2023-04-01 10:57:20,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:19" (2/3) ... [2023-04-01 10:57:20,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aeeef93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:57:20, skipping insertion in model container [2023-04-01 10:57:20,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:57:20" (3/3) ... [2023-04-01 10:57:20,058 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_update_all.i [2023-04-01 10:57:20,070 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:57:20,070 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:57:20,104 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:57:20,108 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;@ef2dd9f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:57:20,108 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:57:20,111 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 30 states have internal predecessors, (39), 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) [2023-04-01 10:57:20,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 10:57:20,119 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:57:20,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:57:20,120 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:57:20,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:57:20,124 INFO L85 PathProgramCache]: Analyzing trace with hash -852270032, now seen corresponding path program 1 times [2023-04-01 10:57:20,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:57:20,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107098673] [2023-04-01 10:57:20,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:57:20,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:57:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:57:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:57:20,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:57:20,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107098673] [2023-04-01 10:57:20,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107098673] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:57:20,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:57:20,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:57:20,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629086787] [2023-04-01 10:57:20,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:57:20,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:57:20,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:57:20,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:57:20,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:57:20,608 INFO L87 Difference]: Start difference. First operand has 47 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 30 states have internal predecessors, (39), 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) Second operand has 5 states, 3 states have (on average 5.333333333333333) internal successors, (16), 5 states have internal predecessors, (16), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 10:57:20,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:57:20,729 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2023-04-01 10:57:20,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 10:57:20,732 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 5.333333333333333) internal successors, (16), 5 states have internal predecessors, (16), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2023-04-01 10:57:20,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:57:20,738 INFO L225 Difference]: With dead ends: 78 [2023-04-01 10:57:20,738 INFO L226 Difference]: Without dead ends: 36 [2023-04-01 10:57:20,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:57:20,747 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 14 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:57:20,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 147 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:57:20,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-01 10:57:20,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2023-04-01 10:57:20,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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) [2023-04-01 10:57:20,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-04-01 10:57:20,783 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 25 [2023-04-01 10:57:20,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:57:20,784 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-04-01 10:57:20,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 5.333333333333333) internal successors, (16), 5 states have internal predecessors, (16), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 10:57:20,784 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-04-01 10:57:20,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 10:57:20,786 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:57:20,786 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, 1, 1, 1, 1, 1, 1] [2023-04-01 10:57:20,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:57:20,788 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:57:20,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:57:20,789 INFO L85 PathProgramCache]: Analyzing trace with hash 592831948, now seen corresponding path program 1 times [2023-04-01 10:57:20,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:57:20,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140964077] [2023-04-01 10:57:20,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:57:20,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:57:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:57:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 10:57:20,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:57:20,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140964077] [2023-04-01 10:57:20,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140964077] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:57:20,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:57:20,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 10:57:20,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792971010] [2023-04-01 10:57:20,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:57:20,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 10:57:20,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:57:20,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 10:57:20,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 10:57:20,987 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 10:57:21,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:57:21,045 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2023-04-01 10:57:21,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 10:57:21,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2023-04-01 10:57:21,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:57:21,048 INFO L225 Difference]: With dead ends: 52 [2023-04-01 10:57:21,048 INFO L226 Difference]: Without dead ends: 43 [2023-04-01 10:57:21,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 10:57:21,053 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:57:21,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 62 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 10:57:21,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-01 10:57:21,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2023-04-01 10:57:21,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2023-04-01 10:57:21,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-04-01 10:57:21,067 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 32 [2023-04-01 10:57:21,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:57:21,067 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-04-01 10:57:21,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 10:57:21,068 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-04-01 10:57:21,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 10:57:21,070 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:57:21,071 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:57:21,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:57:21,076 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:57:21,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:57:21,078 INFO L85 PathProgramCache]: Analyzing trace with hash -570275564, now seen corresponding path program 1 times [2023-04-01 10:57:21,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:57:21,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858642837] [2023-04-01 10:57:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:57:21,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:57:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:57:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 10:57:21,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:57:21,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858642837] [2023-04-01 10:57:21,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858642837] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:57:21,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597754690] [2023-04-01 10:57:21,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:57:21,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:57:21,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:57:21,239 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:57:21,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 10:57:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:57:21,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:57:21,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:57:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 10:57:21,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:57:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 10:57:21,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597754690] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:57:21,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2117217703] [2023-04-01 10:57:21,626 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-04-01 10:57:21,627 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:57:21,636 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:57:21,641 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:57:21,642 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:57:21,762 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 10:57:22,875 INFO L197 IcfgInterpreter]: Interpreting procedure dll_circular_get_data_at with input of size 48 for LOIs [2023-04-01 10:57:22,890 INFO L197 IcfgInterpreter]: Interpreting procedure dll_circular_update_at with input of size 61 for LOIs [2023-04-01 10:57:22,910 INFO L197 IcfgInterpreter]: Interpreting procedure dll_circular_create with input of size 53 for LOIs [2023-04-01 10:57:23,296 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 53 for LOIs [2023-04-01 10:57:23,340 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 10:57:23,343 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:57:30,766 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '605#(and (= main_~data~0 1) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (not (= (select (select |#memory_int| main_~s~0.base) 8) 2)) (= (select |old(#valid)| 0) 0) (<= 0 (+ (select (select |#memory_int| main_~s~0.base) 8) 2147483648)) (not (= |#StackHeapBarrier| 0)) (= main_~len~0 2) (= (select (select |old(#memory_int)| 1) 0) 48) (= main_~i~0 0) (not (= |#StackHeapBarrier| main_~s~0.base)) (= 2 main_~expected~0) (= |#NULL.offset| 0) (<= (select (select |#memory_int| main_~s~0.base) 8) 2147483647) (= 19 (select |old(#length)| 2)) (not (= main_~s~0.base 0)) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= main_~s~0.offset 0) (= |#NULL.base| 0))' at error location [2023-04-01 10:57:30,766 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 10:57:30,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:57:30,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-04-01 10:57:30,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121415288] [2023-04-01 10:57:30,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 10:57:30,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 10:57:30,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:57:30,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 10:57:30,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1378, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 10:57:30,769 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-04-01 10:57:30,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:57:30,847 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2023-04-01 10:57:30,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 10:57:30,848 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 38 [2023-04-01 10:57:30,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:57:30,849 INFO L225 Difference]: With dead ends: 54 [2023-04-01 10:57:30,849 INFO L226 Difference]: Without dead ends: 45 [2023-04-01 10:57:30,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=182, Invalid=1378, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 10:57:30,852 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 57 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:57:30,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 65 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:57:30,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-01 10:57:30,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2023-04-01 10:57:30,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 10:57:30,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2023-04-01 10:57:30,864 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 38 [2023-04-01 10:57:30,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:57:30,864 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2023-04-01 10:57:30,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-04-01 10:57:30,864 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2023-04-01 10:57:30,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 10:57:30,865 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:57:30,865 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:57:30,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 10:57:31,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:57:31,071 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:57:31,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:57:31,072 INFO L85 PathProgramCache]: Analyzing trace with hash -782690724, now seen corresponding path program 2 times [2023-04-01 10:57:31,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:57:31,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711516977] [2023-04-01 10:57:31,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:57:31,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:57:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:57:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:57:31,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:57:31,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711516977] [2023-04-01 10:57:31,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711516977] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:57:31,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200381662] [2023-04-01 10:57:31,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 10:57:31,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:57:31,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:57:31,233 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:57:31,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 10:57:31,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 10:57:31,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 10:57:31,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:57:31,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:57:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 10:57:31,517 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:57:31,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200381662] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:57:31,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:57:31,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 9 [2023-04-01 10:57:31,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859474701] [2023-04-01 10:57:31,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:57:31,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 10:57:31,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:57:31,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 10:57:31,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 10:57:31,518 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 10:57:31,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:57:31,613 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2023-04-01 10:57:31,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:57:31,613 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2023-04-01 10:57:31,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:57:31,615 INFO L225 Difference]: With dead ends: 67 [2023-04-01 10:57:31,615 INFO L226 Difference]: Without dead ends: 58 [2023-04-01 10:57:31,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-01 10:57:31,616 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:57:31,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 100 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:57:31,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-04-01 10:57:31,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2023-04-01 10:57:31,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 10:57:31,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2023-04-01 10:57:31,621 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 44 [2023-04-01 10:57:31,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:57:31,623 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2023-04-01 10:57:31,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 10:57:31,630 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2023-04-01 10:57:31,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 10:57:31,631 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:57:31,631 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:57:31,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 10:57:31,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 10:57:31,834 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:57:31,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:57:31,835 INFO L85 PathProgramCache]: Analyzing trace with hash 33314686, now seen corresponding path program 1 times [2023-04-01 10:57:31,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:57:31,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220855363] [2023-04-01 10:57:31,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:57:31,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:57:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:57:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:57:34,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:57:34,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220855363] [2023-04-01 10:57:34,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220855363] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:57:34,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133952344] [2023-04-01 10:57:34,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:57:34,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:57:34,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:57:34,149 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:57:34,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 10:57:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:57:34,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 115 conjunts are in the unsatisfiable core [2023-04-01 10:57:34,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:57:34,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 10:57:34,541 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-01 10:57:34,541 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 1 case distinctions, treesize of input 11 treesize of output 11 [2023-04-01 10:57:34,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 14 treesize of output 14 [2023-04-01 10:57:34,592 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 14 treesize of output 16 [2023-04-01 10:57:34,658 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2023-04-01 10:57:34,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 99 [2023-04-01 10:57:34,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 71 [2023-04-01 10:57:34,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 93 treesize of output 74 [2023-04-01 10:57:35,093 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 13 treesize of output 9 [2023-04-01 10:57:35,181 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2023-04-01 10:57:35,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 65 [2023-04-01 10:57:35,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2023-04-01 10:57:35,197 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 9 treesize of output 7 [2023-04-01 10:57:35,406 WARN L861 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_588 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| (select (select |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base|) |c_dll_circular_update_at_#in~head.offset|) v_ArrVal_588))) is different from true [2023-04-01 10:57:35,418 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 38 treesize of output 18 [2023-04-01 10:57:35,422 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 14 treesize of output 16 [2023-04-01 10:57:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-04-01 10:57:35,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:57:36,193 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_main_~s~0.base) c_main_~s~0.offset)) (.cse1 (+ 8 c_main_~s~0.offset))) (and (forall ((v_ArrVal_591 (Array Int Int))) (< (select (select (store |c_#memory_int| .cse0 v_ArrVal_591) c_main_~s~0.base) .cse1) (+ c_main_~len~0 1))) (forall ((v_ArrVal_591 (Array Int Int))) (<= c_main_~len~0 (select (select (store |c_#memory_int| .cse0 v_ArrVal_591) c_main_~s~0.base) .cse1))))) is different from false [2023-04-01 10:57:36,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133952344] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:57:36,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [727199473] [2023-04-01 10:57:36,197 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-04-01 10:57:36,198 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:57:36,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:57:36,198 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:57:36,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:57:36,232 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 10:57:36,824 INFO L197 IcfgInterpreter]: Interpreting procedure dll_circular_get_data_at with input of size 48 for LOIs [2023-04-01 10:57:36,836 INFO L197 IcfgInterpreter]: Interpreting procedure dll_circular_update_at with input of size 60 for LOIs [2023-04-01 10:57:36,864 INFO L197 IcfgInterpreter]: Interpreting procedure dll_circular_create with input of size 53 for LOIs [2023-04-01 10:57:37,223 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 53 for LOIs [2023-04-01 10:57:37,270 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 10:57:37,273 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:57:45,129 WARN L223 SmtUtils]: Spent 5.73s on a formula simplification. DAG size of input: 105 DAG size of output: 99 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 10:57:47,046 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1324#(and (= main_~data~0 1) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (not (= (select (select |#memory_int| main_~s~0.base) 8) 2)) (= (select |old(#valid)| 0) 0) (<= 0 (+ (select (select |#memory_int| main_~s~0.base) 8) 2147483648)) (not (= |#StackHeapBarrier| 0)) (= main_~len~0 2) (= (select (select |old(#memory_int)| 1) 0) 48) (= main_~i~0 0) (not (= |#StackHeapBarrier| main_~s~0.base)) (= 2 main_~expected~0) (= |#NULL.offset| 0) (<= (select (select |#memory_int| main_~s~0.base) 8) 2147483647) (= 19 (select |old(#length)| 2)) (not (= main_~s~0.base 0)) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= main_~s~0.offset 0) (= |#NULL.base| 0))' at error location [2023-04-01 10:57:47,046 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 10:57:47,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 10:57:47,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 56 [2023-04-01 10:57:47,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125518234] [2023-04-01 10:57:47,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 10:57:47,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-04-01 10:57:47,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:57:47,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-04-01 10:57:47,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=7666, Unknown=2, NotChecked=354, Total=8372 [2023-04-01 10:57:47,050 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 56 states, 40 states have (on average 1.35) internal successors, (54), 43 states have internal predecessors, (54), 10 states have call successors, (13), 7 states have call predecessors, (13), 12 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2023-04-01 10:57:49,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:57:49,628 INFO L93 Difference]: Finished difference Result 90 states and 122 transitions. [2023-04-01 10:57:49,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-01 10:57:49,629 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 40 states have (on average 1.35) internal successors, (54), 43 states have internal predecessors, (54), 10 states have call successors, (13), 7 states have call predecessors, (13), 12 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) Word has length 45 [2023-04-01 10:57:49,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:57:49,630 INFO L225 Difference]: With dead ends: 90 [2023-04-01 10:57:49,630 INFO L226 Difference]: Without dead ends: 88 [2023-04-01 10:57:49,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3256 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=618, Invalid=12478, Unknown=22, NotChecked=454, Total=13572 [2023-04-01 10:57:49,633 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 127 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 1820 mSolverCounterSat, 64 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1820 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:57:49,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 388 Invalid, 1994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1820 Invalid, 6 Unknown, 104 Unchecked, 1.2s Time] [2023-04-01 10:57:49,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-04-01 10:57:49,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2023-04-01 10:57:49,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 49 states have internal predecessors, (60), 13 states have call successors, (13), 8 states have call predecessors, (13), 11 states have return successors, (21), 13 states have call predecessors, (21), 12 states have call successors, (21) [2023-04-01 10:57:49,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2023-04-01 10:57:49,647 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 45 [2023-04-01 10:57:49,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:57:49,648 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2023-04-01 10:57:49,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 40 states have (on average 1.35) internal successors, (54), 43 states have internal predecessors, (54), 10 states have call successors, (13), 7 states have call predecessors, (13), 12 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2023-04-01 10:57:49,649 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2023-04-01 10:57:49,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 10:57:49,654 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:57:49,654 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:57:49,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 10:57:49,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:57:49,863 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:57:49,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:57:49,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1803295236, now seen corresponding path program 1 times [2023-04-01 10:57:49,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:57:49,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828341764] [2023-04-01 10:57:49,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:57:49,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:57:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:57:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 10:57:49,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:57:49,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828341764] [2023-04-01 10:57:49,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828341764] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:57:49,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277548212] [2023-04-01 10:57:49,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:57:49,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:57:49,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:57:49,929 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:57:49,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 10:57:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:57:50,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:57:50,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:57:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 10:57:50,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:57:50,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 10:57:50,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277548212] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 10:57:50,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 10:57:50,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2023-04-01 10:57:50,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867941809] [2023-04-01 10:57:50,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:57:50,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:57:50,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:57:50,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:57:50,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-04-01 10:57:50,170 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 10:57:50,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:57:50,215 INFO L93 Difference]: Finished difference Result 98 states and 128 transitions. [2023-04-01 10:57:50,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 10:57:50,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2023-04-01 10:57:50,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:57:50,217 INFO L225 Difference]: With dead ends: 98 [2023-04-01 10:57:50,217 INFO L226 Difference]: Without dead ends: 80 [2023-04-01 10:57:50,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-04-01 10:57:50,218 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:57:50,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 71 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 10:57:50,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-04-01 10:57:50,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2023-04-01 10:57:50,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 48 states have (on average 1.3125) internal successors, (63), 53 states have internal predecessors, (63), 14 states have call successors, (14), 8 states have call predecessors, (14), 12 states have return successors, (22), 13 states have call predecessors, (22), 13 states have call successors, (22) [2023-04-01 10:57:50,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 99 transitions. [2023-04-01 10:57:50,226 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 99 transitions. Word has length 46 [2023-04-01 10:57:50,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:57:50,227 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 99 transitions. [2023-04-01 10:57:50,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 10:57:50,227 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 99 transitions. [2023-04-01 10:57:50,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 10:57:50,227 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:57:50,228 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:57:50,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 10:57:50,437 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 [2023-04-01 10:57:50,437 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:57:50,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:57:50,437 INFO L85 PathProgramCache]: Analyzing trace with hash -440321380, now seen corresponding path program 2 times [2023-04-01 10:57:50,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:57:50,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372423978] [2023-04-01 10:57:50,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:57:50,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:57:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:57:50,527 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:57:50,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:57:50,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372423978] [2023-04-01 10:57:50,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372423978] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:57:50,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792868154] [2023-04-01 10:57:50,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 10:57:50,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:57:50,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:57:50,528 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) [2023-04-01 10:57:50,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 10:57:50,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 10:57:50,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 10:57:50,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:57:50,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:57:50,813 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:57:50,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:57:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:57:50,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792868154] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:57:50,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [209420823] [2023-04-01 10:57:50,892 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-04-01 10:57:50,892 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:57:50,892 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:57:50,892 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:57:50,892 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:57:50,910 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 10:57:51,447 INFO L197 IcfgInterpreter]: Interpreting procedure dll_circular_get_data_at with input of size 48 for LOIs [2023-04-01 10:57:51,457 INFO L197 IcfgInterpreter]: Interpreting procedure dll_circular_update_at with input of size 60 for LOIs [2023-04-01 10:57:51,482 INFO L197 IcfgInterpreter]: Interpreting procedure dll_circular_create with input of size 53 for LOIs [2023-04-01 10:57:51,786 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 53 for LOIs [2023-04-01 10:57:51,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 10:57:51,822 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:57:58,447 WARN L223 SmtUtils]: Spent 5.60s on a formula simplification. DAG size of input: 105 DAG size of output: 99 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 10:57:59,598 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2502#(and (= main_~data~0 1) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (not (= (select (select |#memory_int| main_~s~0.base) 8) 2)) (= (select |old(#valid)| 0) 0) (<= 0 (+ (select (select |#memory_int| main_~s~0.base) 8) 2147483648)) (not (= |#StackHeapBarrier| 0)) (= main_~len~0 2) (= (select (select |old(#memory_int)| 1) 0) 48) (= main_~i~0 0) (not (= |#StackHeapBarrier| main_~s~0.base)) (= 2 main_~expected~0) (= |#NULL.offset| 0) (<= (select (select |#memory_int| main_~s~0.base) 8) 2147483647) (= 19 (select |old(#length)| 2)) (not (= main_~s~0.base 0)) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= main_~s~0.offset 0) (= |#NULL.base| 0))' at error location [2023-04-01 10:57:59,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 10:57:59,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:57:59,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2023-04-01 10:57:59,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231379792] [2023-04-01 10:57:59,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 10:57:59,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 10:57:59,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:57:59,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 10:57:59,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 10:57:59,600 INFO L87 Difference]: Start difference. First operand 75 states and 99 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 10:57:59,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:57:59,723 INFO L93 Difference]: Finished difference Result 121 states and 162 transitions. [2023-04-01 10:57:59,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:57:59,724 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 46 [2023-04-01 10:57:59,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:57:59,725 INFO L225 Difference]: With dead ends: 121 [2023-04-01 10:57:59,725 INFO L226 Difference]: Without dead ends: 94 [2023-04-01 10:57:59,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=151, Invalid=1571, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 10:57:59,727 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:57:59,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 103 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:57:59,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-04-01 10:57:59,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 78. [2023-04-01 10:57:59,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 50 states have (on average 1.28) internal successors, (64), 55 states have internal predecessors, (64), 15 states have call successors, (15), 8 states have call predecessors, (15), 12 states have return successors, (23), 14 states have call predecessors, (23), 14 states have call successors, (23) [2023-04-01 10:57:59,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2023-04-01 10:57:59,736 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 46 [2023-04-01 10:57:59,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:57:59,736 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2023-04-01 10:57:59,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 10:57:59,737 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2023-04-01 10:57:59,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 10:57:59,737 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:57:59,737 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:57:59,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 10:57:59,947 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 [2023-04-01 10:57:59,948 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:57:59,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:57:59,948 INFO L85 PathProgramCache]: Analyzing trace with hash -419817332, now seen corresponding path program 3 times [2023-04-01 10:57:59,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:57:59,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526838845] [2023-04-01 10:57:59,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:57:59,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:57:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:58:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 10:58:00,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:58:00,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526838845] [2023-04-01 10:58:00,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526838845] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:58:00,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724553055] [2023-04-01 10:58:00,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 10:58:00,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:58:00,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:58:00,008 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) [2023-04-01 10:58:00,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 10:58:00,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 10:58:00,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 10:58:00,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:58:00,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:58:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 10:58:00,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:58:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 10:58:00,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724553055] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:58:00,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1756095551] [2023-04-01 10:58:00,265 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-04-01 10:58:00,265 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:58:00,266 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:58:00,266 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:58:00,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:58:00,285 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 10:58:00,767 INFO L197 IcfgInterpreter]: Interpreting procedure dll_circular_get_data_at with input of size 48 for LOIs [2023-04-01 10:58:00,777 INFO L197 IcfgInterpreter]: Interpreting procedure dll_circular_update_at with input of size 60 for LOIs [2023-04-01 10:58:00,802 INFO L197 IcfgInterpreter]: Interpreting procedure dll_circular_create with input of size 53 for LOIs [2023-04-01 10:58:01,084 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 53 for LOIs [2023-04-01 10:58:01,118 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 10:58:01,121 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:58:10,024 WARN L223 SmtUtils]: Spent 7.83s on a formula simplification. DAG size of input: 105 DAG size of output: 99 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 10:58:11,200 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3134#(and (= main_~data~0 1) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (not (= (select (select |#memory_int| main_~s~0.base) 8) 2)) (= (select |old(#valid)| 0) 0) (<= 0 (+ (select (select |#memory_int| main_~s~0.base) 8) 2147483648)) (not (= |#StackHeapBarrier| 0)) (= main_~len~0 2) (= (select (select |old(#memory_int)| 1) 0) 48) (= main_~i~0 0) (not (= |#StackHeapBarrier| main_~s~0.base)) (= 2 main_~expected~0) (= |#NULL.offset| 0) (<= (select (select |#memory_int| main_~s~0.base) 8) 2147483647) (= 19 (select |old(#length)| 2)) (not (= main_~s~0.base 0)) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= main_~s~0.offset 0) (= |#NULL.base| 0))' at error location [2023-04-01 10:58:11,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 10:58:11,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:58:11,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-04-01 10:58:11,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417870928] [2023-04-01 10:58:11,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 10:58:11,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 10:58:11,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:58:11,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 10:58:11,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1359, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 10:58:11,202 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 2 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 10:58:11,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:58:11,314 INFO L93 Difference]: Finished difference Result 110 states and 143 transitions. [2023-04-01 10:58:11,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 10:58:11,316 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 2 states have call predecessors, (10), 4 states have call successors, (10) Word has length 46 [2023-04-01 10:58:11,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:58:11,317 INFO L225 Difference]: With dead ends: 110 [2023-04-01 10:58:11,317 INFO L226 Difference]: Without dead ends: 80 [2023-04-01 10:58:11,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=134, Invalid=1506, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 10:58:11,318 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:58:11,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 145 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:58:11,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-04-01 10:58:11,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2023-04-01 10:58:11,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 53 states have internal predecessors, (62), 15 states have call successors, (15), 8 states have call predecessors, (15), 11 states have return successors, (21), 14 states have call predecessors, (21), 14 states have call successors, (21) [2023-04-01 10:58:11,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2023-04-01 10:58:11,328 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 46 [2023-04-01 10:58:11,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:58:11,329 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2023-04-01 10:58:11,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 2 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 10:58:11,329 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2023-04-01 10:58:11,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 10:58:11,329 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:58:11,329 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:58:11,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 10:58:11,532 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 [2023-04-01 10:58:11,533 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:58:11,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:58:11,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1244236086, now seen corresponding path program 4 times [2023-04-01 10:58:11,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:58:11,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192325615] [2023-04-01 10:58:11,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:58:11,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:58:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:58:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 10:58:11,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:58:11,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192325615] [2023-04-01 10:58:11,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192325615] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:58:11,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090952042] [2023-04-01 10:58:11,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 10:58:11,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:58:11,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:58:11,621 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:58:11,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 10:58:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:58:11,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 10:58:11,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:58:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 10:58:11,846 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:58:11,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090952042] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:58:11,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:58:11,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2023-04-01 10:58:11,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10992721] [2023-04-01 10:58:11,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:58:11,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 10:58:11,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:58:11,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 10:58:11,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 10:58:11,849 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 10:58:11,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:58:11,929 INFO L93 Difference]: Finished difference Result 103 states and 132 transitions. [2023-04-01 10:58:11,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:58:11,929 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 51 [2023-04-01 10:58:11,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:58:11,930 INFO L225 Difference]: With dead ends: 103 [2023-04-01 10:58:11,930 INFO L226 Difference]: Without dead ends: 78 [2023-04-01 10:58:11,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:58:11,931 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 9 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:58:11,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 119 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:58:11,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-04-01 10:58:11,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2023-04-01 10:58:11,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 52 states have internal predecessors, (60), 15 states have call successors, (15), 8 states have call predecessors, (15), 11 states have return successors, (18), 13 states have call predecessors, (18), 14 states have call successors, (18) [2023-04-01 10:58:11,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2023-04-01 10:58:11,940 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 51 [2023-04-01 10:58:11,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:58:11,940 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2023-04-01 10:58:11,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 10:58:11,941 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2023-04-01 10:58:11,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 10:58:11,941 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:58:11,941 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:58:11,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 10:58:12,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:58:12,149 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:58:12,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:58:12,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1274416358, now seen corresponding path program 5 times [2023-04-01 10:58:12,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:58:12,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842278233] [2023-04-01 10:58:12,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:58:12,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:58:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:58:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 10:58:12,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:58:12,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842278233] [2023-04-01 10:58:12,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842278233] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:58:12,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766569654] [2023-04-01 10:58:12,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 10:58:12,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:58:12,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:58:12,244 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:58:12,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 10:58:12,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 10:58:12,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 10:58:12,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 10:58:12,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:58:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 10:58:12,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:58:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 10:58:12,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766569654] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 10:58:12,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 10:58:12,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2023-04-01 10:58:12,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499053654] [2023-04-01 10:58:12,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:58:12,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 10:58:12,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:58:12,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 10:58:12,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-01 10:58:12,616 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2023-04-01 10:58:12,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:58:12,668 INFO L93 Difference]: Finished difference Result 99 states and 124 transitions. [2023-04-01 10:58:12,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:58:12,668 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 52 [2023-04-01 10:58:12,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:58:12,669 INFO L225 Difference]: With dead ends: 99 [2023-04-01 10:58:12,669 INFO L226 Difference]: Without dead ends: 64 [2023-04-01 10:58:12,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-01 10:58:12,670 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:58:12,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 73 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 10:58:12,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-04-01 10:58:12,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-04-01 10:58:12,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 45 states have internal predecessors, (52), 12 states have call successors, (12), 8 states have call predecessors, (12), 10 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2023-04-01 10:58:12,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2023-04-01 10:58:12,676 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 52 [2023-04-01 10:58:12,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:58:12,677 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2023-04-01 10:58:12,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2023-04-01 10:58:12,677 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2023-04-01 10:58:12,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 10:58:12,677 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:58:12,677 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:58:12,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 10:58:12,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 10:58:12,881 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:58:12,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:58:12,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1535959596, now seen corresponding path program 6 times [2023-04-01 10:58:12,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:58:12,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726302106] [2023-04-01 10:58:12,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:58:12,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:58:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:58:12,974 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 10:58:12,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:58:12,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726302106] [2023-04-01 10:58:12,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726302106] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:58:12,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797661463] [2023-04-01 10:58:12,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 10:58:12,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:58:12,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:58:12,976 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:58:12,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 10:58:13,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 10:58:13,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 10:58:13,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 10:58:13,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:58:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 10:58:13,223 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:58:13,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797661463] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:58:13,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:58:13,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-04-01 10:58:13,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963388809] [2023-04-01 10:58:13,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:58:13,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 10:58:13,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:58:13,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 10:58:13,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2023-04-01 10:58:13,225 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 10:58:13,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:58:13,271 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2023-04-01 10:58:13,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:58:13,271 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 52 [2023-04-01 10:58:13,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:58:13,272 INFO L225 Difference]: With dead ends: 83 [2023-04-01 10:58:13,272 INFO L226 Difference]: Without dead ends: 48 [2023-04-01 10:58:13,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2023-04-01 10:58:13,273 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:58:13,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 68 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 10:58:13,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-04-01 10:58:13,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-04-01 10:58:13,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 10:58:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2023-04-01 10:58:13,277 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 52 [2023-04-01 10:58:13,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:58:13,278 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2023-04-01 10:58:13,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 10:58:13,278 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2023-04-01 10:58:13,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 10:58:13,278 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:58:13,278 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:58:13,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 10:58:13,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:58:13,488 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:58:13,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:58:13,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1273843973, now seen corresponding path program 1 times [2023-04-01 10:58:13,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:58:13,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991728549] [2023-04-01 10:58:13,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:58:13,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:58:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:58:13,564 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 10:58:13,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:58:13,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991728549] [2023-04-01 10:58:13,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991728549] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:58:13,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017914878] [2023-04-01 10:58:13,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:58:13,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:58:13,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:58:13,569 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:58:13,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 10:58:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:58:13,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 10:58:13,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:58:13,798 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 10:58:13,799 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:58:13,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017914878] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:58:13,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:58:13,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2023-04-01 10:58:13,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4691630] [2023-04-01 10:58:13,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:58:13,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 10:58:13,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:58:13,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 10:58:13,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 10:58:13,801 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 10:58:13,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:58:13,869 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2023-04-01 10:58:13,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:58:13,869 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 52 [2023-04-01 10:58:13,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:58:13,870 INFO L225 Difference]: With dead ends: 52 [2023-04-01 10:58:13,870 INFO L226 Difference]: Without dead ends: 48 [2023-04-01 10:58:13,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:58:13,870 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:58:13,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 117 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:58:13,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-04-01 10:58:13,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-04-01 10:58:13,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 10:58:13,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2023-04-01 10:58:13,875 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 52 [2023-04-01 10:58:13,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:58:13,875 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2023-04-01 10:58:13,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 10:58:13,875 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2023-04-01 10:58:13,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 10:58:13,876 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:58:13,876 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:58:13,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 10:58:14,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 10:58:14,076 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:58:14,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:58:14,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1604997469, now seen corresponding path program 1 times [2023-04-01 10:58:14,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:58:14,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567161913] [2023-04-01 10:58:14,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:58:14,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:58:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:58:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 10:58:15,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:58:15,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567161913] [2023-04-01 10:58:15,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567161913] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:58:15,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725160574] [2023-04-01 10:58:15,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:58:15,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:58:15,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:58:15,873 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:58:15,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 10:58:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:58:16,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 122 conjunts are in the unsatisfiable core [2023-04-01 10:58:16,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:58:16,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 10:58:16,273 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-01 10:58:16,274 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 1 case distinctions, treesize of input 11 treesize of output 11 [2023-04-01 10:58:16,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 14 treesize of output 14 [2023-04-01 10:58:16,325 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 14 treesize of output 16 [2023-04-01 10:58:16,380 INFO L321 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2023-04-01 10:58:16,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 95 [2023-04-01 10:58:16,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 10:58:16,391 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 18 [2023-04-01 10:58:16,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2023-04-01 10:58:16,396 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 9 treesize of output 7 [2023-04-01 10:58:16,631 WARN L861 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1983 Int) (dll_circular_update_at_~head.offset Int)) (and (= (store |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base|) (+ dll_circular_update_at_~head.offset 8) v_ArrVal_1983)) |c_#memory_$Pointer$.base|) (<= |c_dll_circular_update_at_#in~head.offset| dll_circular_update_at_~head.offset))) is different from true [2023-04-01 10:58:16,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:58:16,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2023-04-01 10:58:16,876 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 25 treesize of output 17 [2023-04-01 10:58:16,973 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-01 10:58:16,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 66 [2023-04-01 10:58:16,978 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 45 treesize of output 45 [2023-04-01 10:58:17,806 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:58:17,807 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 118 treesize of output 90 [2023-04-01 10:58:17,812 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2023-04-01 10:58:17,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 16 [2023-04-01 10:58:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-04-01 10:58:17,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:58:18,389 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 116 treesize of output 88 [2023-04-01 10:58:18,391 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 104 treesize of output 96 [2023-04-01 10:58:18,394 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 79 treesize of output 75 [2023-04-01 10:58:18,403 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 116 treesize of output 88 [2023-04-01 10:58:18,406 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 10:58:18,573 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 76 treesize of output 56 [2023-04-01 10:58:18,582 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 76 treesize of output 56 [2023-04-01 10:58:19,727 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1980 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| c_dll_circular_create_~last~0.base v_ArrVal_1980) c_dll_circular_create_~head~0.base) c_dll_circular_create_~head~0.offset) c_dll_circular_create_~head~0.base))) is different from false [2023-04-01 10:58:19,768 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:58:19,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 68 treesize of output 82 [2023-04-01 10:58:19,790 INFO L321 Elim1Store]: treesize reduction 10, result has 70.6 percent of original size [2023-04-01 10:58:19,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 91 [2023-04-01 10:58:19,802 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:58:19,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 58 [2023-04-01 10:58:19,826 INFO L321 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2023-04-01 10:58:19,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 10 treesize of output 18 [2023-04-01 10:58:19,834 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 40 treesize of output 36 [2023-04-01 10:58:19,837 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 22 treesize of output 20 [2023-04-01 10:58:19,847 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 6 treesize of output 4 [2023-04-01 10:58:19,854 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 6 treesize of output 4 [2023-04-01 10:58:19,861 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 6 treesize of output 4 [2023-04-01 10:58:20,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725160574] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:58:20,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1323275126] [2023-04-01 10:58:20,011 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-04-01 10:58:20,011 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:58:20,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:58:20,012 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:58:20,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:58:20,043 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 10:58:20,633 INFO L197 IcfgInterpreter]: Interpreting procedure dll_circular_get_data_at with input of size 48 for LOIs [2023-04-01 10:58:20,649 INFO L197 IcfgInterpreter]: Interpreting procedure dll_circular_update_at with input of size 60 for LOIs [2023-04-01 10:58:20,672 INFO L197 IcfgInterpreter]: Interpreting procedure dll_circular_create with input of size 53 for LOIs [2023-04-01 10:58:20,953 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 53 for LOIs [2023-04-01 10:58:20,994 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 10:58:20,998 INFO L180 IcfgInterpreter]: Interpretation finished