/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/forester-heap/sll-circular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:51:08,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:51:08,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:51:08,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:51:08,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:51:08,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:51:08,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:51:08,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:51:08,406 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:51:08,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:51:08,411 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:51:08,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:51:08,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:51:08,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:51:08,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:51:08,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:51:08,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:51:08,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:51:08,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:51:08,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:51:08,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:51:08,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:51:08,430 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:51:08,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:51:08,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:51:08,440 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:51:08,440 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:51:08,441 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:51:08,442 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:51:08,442 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:51:08,443 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:51:08,444 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:51:08,445 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:51:08,446 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:51:08,446 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:51:08,446 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:51:08,447 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:51:08,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:51:08,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:51:08,447 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:51:08,448 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:51:08,449 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 22:51:08,483 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:51:08,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:51:08,483 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:51:08,483 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:51:08,484 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:51:08,484 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:51:08,485 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:51:08,485 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:51:08,485 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:51:08,485 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:51:08,486 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:51:08,486 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:51:08,486 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:51:08,486 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:51:08,486 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:51:08,486 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:51:08,486 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:51:08,486 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:51:08,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:51:08,487 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:51:08,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:51:08,487 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:51:08,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:51:08,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:51:08,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:51:08,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:51:08,488 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:51:08,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:51:08,488 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:51:08,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:51:08,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:51:08,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:51:08,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:51:08,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:51:08,489 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:51:08,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:51:08,489 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:51:08,490 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:51:08,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:51:08,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:51:08,490 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:51:08,490 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:51:08,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:51:08,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:51:08,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:51:08,729 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:51:08,729 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:51:08,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-circular-1.i [2023-03-31 22:51:09,881 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:51:10,150 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:51:10,150 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-circular-1.i [2023-03-31 22:51:10,165 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cababe45a/3d5841a6c534468e82aec641044d36ea/FLAGb1fd48733 [2023-03-31 22:51:10,180 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cababe45a/3d5841a6c534468e82aec641044d36ea [2023-03-31 22:51:10,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:51:10,184 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:51:10,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:51:10,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:51:10,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:51:10,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:51:10" (1/1) ... [2023-03-31 22:51:10,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29b56792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:51:10, skipping insertion in model container [2023-03-31 22:51:10,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:51:10" (1/1) ... [2023-03-31 22:51:10,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:51:10,242 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:51:10,497 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/forester-heap/sll-circular-1.i[22324,22337] [2023-03-31 22:51:10,503 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/forester-heap/sll-circular-1.i[22430,22443] [2023-03-31 22:51:10,505 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/forester-heap/sll-circular-1.i[22555,22568] [2023-03-31 22:51:10,511 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:51:10,522 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:51:10,566 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/forester-heap/sll-circular-1.i[22324,22337] [2023-03-31 22:51:10,568 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/forester-heap/sll-circular-1.i[22430,22443] [2023-03-31 22:51:10,569 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/forester-heap/sll-circular-1.i[22555,22568] [2023-03-31 22:51:10,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:51:10,594 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:51:10,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:51:10 WrapperNode [2023-03-31 22:51:10,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:51:10,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:51:10,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:51:10,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:51:10,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:51:10" (1/1) ... [2023-03-31 22:51:10,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:51:10" (1/1) ... [2023-03-31 22:51:10,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:51:10" (1/1) ... [2023-03-31 22:51:10,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:51:10" (1/1) ... [2023-03-31 22:51:10,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:51:10" (1/1) ... [2023-03-31 22:51:10,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:51:10" (1/1) ... [2023-03-31 22:51:10,636 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:51:10" (1/1) ... [2023-03-31 22:51:10,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:51:10" (1/1) ... [2023-03-31 22:51:10,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:51:10,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:51:10,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:51:10,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:51:10,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:51:10" (1/1) ... [2023-03-31 22:51:10,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:51:10,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:51:10,680 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 22:51:10,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 22:51:10,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:51:10,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:51:10,716 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:51:10,716 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:51:10,717 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-03-31 22:51:10,717 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-03-31 22:51:10,717 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-03-31 22:51:10,717 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-03-31 22:51:10,717 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-03-31 22:51:10,717 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-03-31 22:51:10,717 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-03-31 22:51:10,717 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-03-31 22:51:10,717 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-03-31 22:51:10,717 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-03-31 22:51:10,718 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-03-31 22:51:10,718 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-03-31 22:51:10,718 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-03-31 22:51:10,718 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-03-31 22:51:10,718 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-03-31 22:51:10,718 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-03-31 22:51:10,718 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-03-31 22:51:10,718 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-03-31 22:51:10,718 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-03-31 22:51:10,718 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-03-31 22:51:10,719 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-03-31 22:51:10,719 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-03-31 22:51:10,720 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-03-31 22:51:10,720 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-03-31 22:51:10,720 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-03-31 22:51:10,720 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-03-31 22:51:10,720 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-03-31 22:51:10,720 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-03-31 22:51:10,720 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-03-31 22:51:10,720 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-03-31 22:51:10,720 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-03-31 22:51:10,721 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-03-31 22:51:10,721 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-03-31 22:51:10,721 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-03-31 22:51:10,721 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-03-31 22:51:10,721 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-03-31 22:51:10,722 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-03-31 22:51:10,722 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-03-31 22:51:10,723 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-03-31 22:51:10,723 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-03-31 22:51:10,723 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-03-31 22:51:10,723 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-03-31 22:51:10,723 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-03-31 22:51:10,724 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-03-31 22:51:10,724 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-03-31 22:51:10,724 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-03-31 22:51:10,724 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-03-31 22:51:10,724 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-03-31 22:51:10,725 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-03-31 22:51:10,725 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-03-31 22:51:10,725 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 22:51:10,726 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-03-31 22:51:10,726 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-03-31 22:51:10,726 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 22:51:10,727 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-03-31 22:51:10,727 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-03-31 22:51:10,727 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-03-31 22:51:10,727 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-03-31 22:51:10,727 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-03-31 22:51:10,727 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:51:10,727 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-03-31 22:51:10,727 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-03-31 22:51:10,728 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-03-31 22:51:10,728 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:51:10,728 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-03-31 22:51:10,728 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-03-31 22:51:10,728 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-03-31 22:51:10,728 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-03-31 22:51:10,728 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-03-31 22:51:10,728 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-03-31 22:51:10,728 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-03-31 22:51:10,728 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-03-31 22:51:10,729 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-03-31 22:51:10,729 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-03-31 22:51:10,729 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-03-31 22:51:10,729 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-03-31 22:51:10,729 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-03-31 22:51:10,729 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-03-31 22:51:10,729 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-03-31 22:51:10,729 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-03-31 22:51:10,729 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-03-31 22:51:10,729 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-03-31 22:51:10,729 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-03-31 22:51:10,730 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-03-31 22:51:10,730 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-03-31 22:51:10,730 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-03-31 22:51:10,730 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-03-31 22:51:10,730 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-03-31 22:51:10,730 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-03-31 22:51:10,730 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-03-31 22:51:10,730 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-03-31 22:51:10,730 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-03-31 22:51:10,731 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-03-31 22:51:10,731 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-03-31 22:51:10,731 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-03-31 22:51:10,731 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-03-31 22:51:10,731 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-03-31 22:51:10,731 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-03-31 22:51:10,731 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-03-31 22:51:10,732 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-03-31 22:51:10,732 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-03-31 22:51:10,732 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-03-31 22:51:10,732 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-03-31 22:51:10,732 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:51:10,732 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:51:10,732 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 22:51:10,732 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 22:51:10,733 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:51:10,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:51:10,733 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:51:10,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 22:51:10,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 22:51:10,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:51:10,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 22:51:10,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:51:10,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:51:10,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:51:10,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:51:10,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:51:11,022 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:51:11,023 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:51:11,160 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:51:11,186 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:51:11,186 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-03-31 22:51:11,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:51:11 BoogieIcfgContainer [2023-03-31 22:51:11,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:51:11,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:51:11,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:51:11,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:51:11,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:51:10" (1/3) ... [2023-03-31 22:51:11,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fff5482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:51:11, skipping insertion in model container [2023-03-31 22:51:11,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:51:10" (2/3) ... [2023-03-31 22:51:11,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fff5482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:51:11, skipping insertion in model container [2023-03-31 22:51:11,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:51:11" (3/3) ... [2023-03-31 22:51:11,196 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-circular-1.i [2023-03-31 22:51:11,211 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:51:11,211 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-03-31 22:51:11,259 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:51:11,264 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;@15ac42dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:51:11,264 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-03-31 22:51:11,268 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 30 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:51:11,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-03-31 22:51:11,273 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:51:11,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:51:11,274 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:51:11,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:51:11,279 INFO L85 PathProgramCache]: Analyzing trace with hash -130707835, now seen corresponding path program 1 times [2023-03-31 22:51:11,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:51:11,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915654373] [2023-03-31 22:51:11,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:51:11,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:51:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:51:11,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:51:11,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:51:11,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915654373] [2023-03-31 22:51:11,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915654373] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:51:11,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:51:11,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 22:51:11,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790396035] [2023-03-31 22:51:11,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:51:11,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 22:51:11,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:51:11,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 22:51:11,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 22:51:11,495 INFO L87 Difference]: Start difference. First operand has 35 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 30 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:11,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:51:11,527 INFO L93 Difference]: Finished difference Result 65 states and 99 transitions. [2023-03-31 22:51:11,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 22:51:11,531 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-03-31 22:51:11,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:51:11,543 INFO L225 Difference]: With dead ends: 65 [2023-03-31 22:51:11,543 INFO L226 Difference]: Without dead ends: 28 [2023-03-31 22:51:11,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 22:51:11,551 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:51:11,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:51:11,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-03-31 22:51:11,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-03-31 22:51:11,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 24 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:11,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-03-31 22:51:11,588 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 9 [2023-03-31 22:51:11,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:51:11,589 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-03-31 22:51:11,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:11,589 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-03-31 22:51:11,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-03-31 22:51:11,590 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:51:11,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:51:11,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:51:11,590 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:51:11,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:51:11,591 INFO L85 PathProgramCache]: Analyzing trace with hash 202056055, now seen corresponding path program 1 times [2023-03-31 22:51:11,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:51:11,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951203366] [2023-03-31 22:51:11,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:51:11,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:51:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:51:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:51:12,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:51:12,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951203366] [2023-03-31 22:51:12,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951203366] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:51:12,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:51:12,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 22:51:12,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449490203] [2023-03-31 22:51:12,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:51:12,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 22:51:12,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:51:12,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 22:51:12,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 22:51:12,027 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:12,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:51:12,094 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2023-03-31 22:51:12,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 22:51:12,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-03-31 22:51:12,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:51:12,095 INFO L225 Difference]: With dead ends: 43 [2023-03-31 22:51:12,095 INFO L226 Difference]: Without dead ends: 39 [2023-03-31 22:51:12,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:51:12,097 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:51:12,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:51:12,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-03-31 22:51:12,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2023-03-31 22:51:12,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:12,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2023-03-31 22:51:12,104 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 10 [2023-03-31 22:51:12,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:51:12,104 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2023-03-31 22:51:12,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:12,104 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2023-03-31 22:51:12,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-03-31 22:51:12,105 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:51:12,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:51:12,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:51:12,106 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:51:12,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:51:12,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1412533624, now seen corresponding path program 1 times [2023-03-31 22:51:12,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:51:12,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013767320] [2023-03-31 22:51:12,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:51:12,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:51:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:51:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:51:12,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:51:12,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013767320] [2023-03-31 22:51:12,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013767320] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:51:12,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:51:12,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:51:12,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229058429] [2023-03-31 22:51:12,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:51:12,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:51:12,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:51:12,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:51:12,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:51:12,203 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:12,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:51:12,246 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2023-03-31 22:51:12,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:51:12,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-03-31 22:51:12,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:51:12,252 INFO L225 Difference]: With dead ends: 71 [2023-03-31 22:51:12,252 INFO L226 Difference]: Without dead ends: 50 [2023-03-31 22:51:12,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:51:12,256 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 18 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:51:12,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 46 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:51:12,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-03-31 22:51:12,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2023-03-31 22:51:12,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.28125) internal successors, (41), 33 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:12,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-03-31 22:51:12,268 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 13 [2023-03-31 22:51:12,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:51:12,268 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-03-31 22:51:12,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:12,268 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-03-31 22:51:12,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-03-31 22:51:12,269 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:51:12,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:51:12,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:51:12,269 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:51:12,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:51:12,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1040469136, now seen corresponding path program 1 times [2023-03-31 22:51:12,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:51:12,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947603408] [2023-03-31 22:51:12,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:51:12,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:51:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:51:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:51:13,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:51:13,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947603408] [2023-03-31 22:51:13,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947603408] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:51:13,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:51:13,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 22:51:13,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110676292] [2023-03-31 22:51:13,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:51:13,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 22:51:13,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:51:13,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 22:51:13,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-03-31 22:51:13,094 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:13,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:51:13,288 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2023-03-31 22:51:13,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:51:13,288 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-03-31 22:51:13,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:51:13,289 INFO L225 Difference]: With dead ends: 48 [2023-03-31 22:51:13,289 INFO L226 Difference]: Without dead ends: 35 [2023-03-31 22:51:13,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-03-31 22:51:13,291 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:51:13,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 96 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 22:51:13,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-03-31 22:51:13,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-03-31 22:51:13,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:13,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-03-31 22:51:13,302 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 15 [2023-03-31 22:51:13,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:51:13,302 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-03-31 22:51:13,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:13,303 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-03-31 22:51:13,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-03-31 22:51:13,304 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:51:13,304 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:51:13,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 22:51:13,304 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:51:13,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:51:13,305 INFO L85 PathProgramCache]: Analyzing trace with hash -323344180, now seen corresponding path program 1 times [2023-03-31 22:51:13,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:51:13,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631755219] [2023-03-31 22:51:13,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:51:13,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:51:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:51:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:51:13,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:51:13,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631755219] [2023-03-31 22:51:13,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631755219] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:51:13,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255806924] [2023-03-31 22:51:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:51:13,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:51:13,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:51:13,501 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:51:13,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:51:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:51:13,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2023-03-31 22:51:13,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:51:13,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-03-31 22:51:13,778 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-03-31 22:51:13,794 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-03-31 22:51:13,794 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-03-31 22:51:13,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-03-31 22:51:13,819 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-03-31 22:51:13,820 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 [2023-03-31 22:51:13,856 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 [2023-03-31 22:51:13,904 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 47 treesize of output 27 [2023-03-31 22:51:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:51:13,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:51:13,973 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:51:13,973 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-03-31 22:51:13,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:51:13,981 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 50 treesize of output 41 [2023-03-31 22:51:13,986 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 20 treesize of output 18 [2023-03-31 22:51:14,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:51:14,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255806924] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:51:14,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [555801648] [2023-03-31 22:51:14,088 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 22:51:14,089 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:51:14,091 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:51:14,095 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:51:14,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:51:14,145 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 22:51:14,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:51:14,525 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:51:19,948 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '632#(and (= main_~state~0 1) (= main_~head~0.offset 0) (= main_~x~0.offset 0) (= (select (select |#memory_$Pointer$.offset| main_~head~0.base) 0) 0) (exists ((|v_#memory_$Pointer$.offset_31| (Array Int (Array Int Int))) (|v_#memory_int_45| (Array Int (Array Int Int))) (v_main_~x~0.base_33 Int) (|v_#memory_$Pointer$.base_34| (Array Int (Array Int Int)))) (and (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_31| v_main_~x~0.base_33 (store (select |v_#memory_$Pointer$.offset_31| v_main_~x~0.base_33) 4 (select (select |#memory_$Pointer$.offset| v_main_~x~0.base_33) 4)))) (= |#memory_int| (store |v_#memory_int_45| v_main_~x~0.base_33 (store (select |v_#memory_int_45| v_main_~x~0.base_33) 4 1))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_34| v_main_~x~0.base_33 (store (select |v_#memory_$Pointer$.base_34| v_main_~x~0.base_33) 4 (select (select |#memory_$Pointer$.base| v_main_~x~0.base_33) 4)))))) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.base| main_~head~0.base) 0) 0) (<= 0 |#StackHeapBarrier|) (= main_~x~0.base 0) (= |#NULL.base| 0))' at error location [2023-03-31 22:51:19,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:51:19,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:51:19,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-03-31 22:51:19,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377921951] [2023-03-31 22:51:19,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:51:19,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 22:51:19,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:51:19,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 22:51:19,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=315, Unknown=1, NotChecked=0, Total=380 [2023-03-31 22:51:19,951 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:20,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:51:20,031 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2023-03-31 22:51:20,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 22:51:20,032 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-03-31 22:51:20,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:51:20,033 INFO L225 Difference]: With dead ends: 60 [2023-03-31 22:51:20,033 INFO L226 Difference]: Without dead ends: 58 [2023-03-31 22:51:20,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=70, Invalid=349, Unknown=1, NotChecked=0, Total=420 [2023-03-31 22:51:20,034 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:51:20,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 79 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 22:51:20,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-03-31 22:51:20,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2023-03-31 22:51:20,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.25) internal successors, (55), 45 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:20,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2023-03-31 22:51:20,040 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 16 [2023-03-31 22:51:20,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:51:20,040 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2023-03-31 22:51:20,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:20,043 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2023-03-31 22:51:20,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-03-31 22:51:20,044 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:51:20,045 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:51:20,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 22:51:20,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:51:20,252 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:51:20,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:51:20,252 INFO L85 PathProgramCache]: Analyzing trace with hash -899560891, now seen corresponding path program 1 times [2023-03-31 22:51:20,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:51:20,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199487073] [2023-03-31 22:51:20,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:51:20,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:51:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:51:20,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:51:20,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:51:20,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199487073] [2023-03-31 22:51:20,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199487073] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:51:20,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:51:20,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:51:20,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133496100] [2023-03-31 22:51:20,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:51:20,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:51:20,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:51:20,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:51:20,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:51:20,297 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:20,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:51:20,323 INFO L93 Difference]: Finished difference Result 93 states and 110 transitions. [2023-03-31 22:51:20,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:51:20,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-03-31 22:51:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:51:20,325 INFO L225 Difference]: With dead ends: 93 [2023-03-31 22:51:20,325 INFO L226 Difference]: Without dead ends: 72 [2023-03-31 22:51:20,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:51:20,326 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 15 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:51:20,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 65 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:51:20,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-03-31 22:51:20,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2023-03-31 22:51:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.25) internal successors, (65), 53 states have internal predecessors, (65), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:20,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2023-03-31 22:51:20,340 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 20 [2023-03-31 22:51:20,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:51:20,340 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2023-03-31 22:51:20,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:20,341 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2023-03-31 22:51:20,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:51:20,341 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:51:20,341 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:51:20,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 22:51:20,342 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:51:20,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:51:20,342 INFO L85 PathProgramCache]: Analyzing trace with hash 2040854843, now seen corresponding path program 1 times [2023-03-31 22:51:20,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:51:20,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267752875] [2023-03-31 22:51:20,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:51:20,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:51:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:51:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:51:20,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:51:20,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267752875] [2023-03-31 22:51:20,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267752875] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:51:20,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165966831] [2023-03-31 22:51:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:51:20,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:51:20,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:51:20,913 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:51:20,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:51:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:51:21,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 60 conjunts are in the unsatisfiable core [2023-03-31 22:51:21,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:51:21,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 22:51:21,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-03-31 22:51:21,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-03-31 22:51:21,134 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-03-31 22:51:21,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-03-31 22:51:21,177 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2023-03-31 22:51:21,178 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 46 treesize of output 54 [2023-03-31 22:51:21,204 INFO L321 Elim1Store]: treesize reduction 35, result has 34.0 percent of original size [2023-03-31 22:51:21,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 71 [2023-03-31 22:51:21,219 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 [2023-03-31 22:51:21,237 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 [2023-03-31 22:51:21,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 6 [2023-03-31 22:51:21,281 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 [2023-03-31 22:51:21,313 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-03-31 22:51:21,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-03-31 22:51:21,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-03-31 22:51:21,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-03-31 22:51:21,398 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 26 treesize of output 28 [2023-03-31 22:51:21,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:51:21,412 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 26 treesize of output 28 [2023-03-31 22:51:21,558 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-03-31 22:51:21,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 56 [2023-03-31 22:51:21,567 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 54 treesize of output 48 [2023-03-31 22:51:21,580 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 26 treesize of output 28 [2023-03-31 22:51:21,742 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-03-31 22:51:21,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 181 treesize of output 110 [2023-03-31 22:51:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:51:21,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:51:21,947 INFO L321 Elim1Store]: treesize reduction 13, result has 69.0 percent of original size [2023-03-31 22:51:21,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 875 treesize of output 777 [2023-03-31 22:51:22,776 INFO L321 Elim1Store]: treesize reduction 600, result has 43.5 percent of original size [2023-03-31 22:51:22,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 29 case distinctions, treesize of input 199791 treesize of output 194852 [2023-03-31 22:51:26,368 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:51:26,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 16195 treesize of output 14691 [2023-03-31 22:51:28,491 INFO L321 Elim1Store]: treesize reduction 204, result has 26.9 percent of original size [2023-03-31 22:51:28,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 8954 treesize of output 7314 [2023-03-31 22:51:29,854 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:51:29,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 24105 treesize of output 23129 [2023-03-31 22:51:32,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:51:34,563 INFO L321 Elim1Store]: treesize reduction 220, result has 27.4 percent of original size [2023-03-31 22:51:34,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 233678 treesize of output 204916 [2023-03-31 22:51:38,397 INFO L321 Elim1Store]: treesize reduction 8, result has 95.7 percent of original size [2023-03-31 22:51:38,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 20 case distinctions, treesize of input 14770 treesize of output 14362 [2023-03-31 22:52:14,095 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:52:14,096 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 34 treesize of output 31 [2023-03-31 22:52:14,297 WARN L207 Elim1Store]: Array PQE input equivalent to true