/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/reducercommutativity/max40-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 08:48:57,461 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 08:48:57,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 08:48:57,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 08:48:57,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 08:48:57,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 08:48:57,494 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 08:48:57,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 08:48:57,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 08:48:57,501 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 08:48:57,502 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 08:48:57,504 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 08:48:57,504 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 08:48:57,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 08:48:57,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 08:48:57,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 08:48:57,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 08:48:57,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 08:48:57,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 08:48:57,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 08:48:57,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 08:48:57,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 08:48:57,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 08:48:57,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 08:48:57,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 08:48:57,524 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 08:48:57,524 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 08:48:57,525 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 08:48:57,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 08:48:57,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 08:48:57,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 08:48:57,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 08:48:57,527 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 08:48:57,528 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 08:48:57,528 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 08:48:57,528 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 08:48:57,529 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 08:48:57,529 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 08:48:57,529 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 08:48:57,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 08:48:57,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 08:48:57,531 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 08:48:57,555 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 08:48:57,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 08:48:57,556 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 08:48:57,556 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 08:48:57,557 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 08:48:57,557 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 08:48:57,557 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 08:48:57,557 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 08:48:57,557 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 08:48:57,557 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 08:48:57,558 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 08:48:57,558 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 08:48:57,558 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 08:48:57,558 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 08:48:57,558 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 08:48:57,558 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 08:48:57,558 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 08:48:57,558 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 08:48:57,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 08:48:57,559 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 08:48:57,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 08:48:57,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 08:48:57,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 08:48:57,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 08:48:57,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 08:48:57,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 08:48:57,559 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 08:48:57,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 08:48:57,560 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 08:48:57,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 08:48:57,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 08:48:57,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 08:48:57,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:48:57,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 08:48:57,560 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 08:48:57,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 08:48:57,560 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 08:48:57,561 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 08:48:57,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 08:48:57,561 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 08:48:57,561 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 08:48:57,561 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 08:48:57,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 08:48:57,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 08:48:57,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 08:48:57,754 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 08:48:57,754 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 08:48:57,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/max40-1.i [2023-04-01 08:48:58,792 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 08:48:58,928 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 08:48:58,928 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max40-1.i [2023-04-01 08:48:58,933 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f07141259/d9cc74e2f30e4dffab76bf3cd6f71d75/FLAG6d83acc1d [2023-04-01 08:48:58,949 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f07141259/d9cc74e2f30e4dffab76bf3cd6f71d75 [2023-04-01 08:48:58,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 08:48:58,952 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 08:48:58,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 08:48:58,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 08:48:58,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 08:48:58,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:48:58" (1/1) ... [2023-04-01 08:48:58,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@338081b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:48:58, skipping insertion in model container [2023-04-01 08:48:58,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:48:58" (1/1) ... [2023-04-01 08:48:58,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 08:48:58,980 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 08:48:59,103 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/reducercommutativity/max40-1.i[1290,1303] [2023-04-01 08:48:59,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:48:59,113 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 08:48:59,128 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/reducercommutativity/max40-1.i[1290,1303] [2023-04-01 08:48:59,128 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:48:59,138 INFO L208 MainTranslator]: Completed translation [2023-04-01 08:48:59,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:48:59 WrapperNode [2023-04-01 08:48:59,138 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 08:48:59,139 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 08:48:59,139 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 08:48:59,139 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 08:48:59,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:48:59" (1/1) ... [2023-04-01 08:48:59,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:48:59" (1/1) ... [2023-04-01 08:48:59,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:48:59" (1/1) ... [2023-04-01 08:48:59,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:48:59" (1/1) ... [2023-04-01 08:48:59,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:48:59" (1/1) ... [2023-04-01 08:48:59,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:48:59" (1/1) ... [2023-04-01 08:48:59,160 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:48:59" (1/1) ... [2023-04-01 08:48:59,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:48:59" (1/1) ... [2023-04-01 08:48:59,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 08:48:59,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 08:48:59,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 08:48:59,163 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 08:48:59,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:48:59" (1/1) ... [2023-04-01 08:48:59,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:48:59,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:48:59,197 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 08:48:59,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 08:48:59,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 08:48:59,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 08:48:59,225 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 08:48:59,225 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2023-04-01 08:48:59,225 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 08:48:59,225 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 08:48:59,225 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 08:48:59,225 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 08:48:59,225 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 08:48:59,225 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 08:48:59,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 08:48:59,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 08:48:59,226 INFO L130 BoogieDeclarations]: Found specification of procedure max [2023-04-01 08:48:59,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 08:48:59,226 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 08:48:59,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 08:48:59,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 08:48:59,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 08:48:59,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 08:48:59,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 08:48:59,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 08:48:59,303 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 08:48:59,305 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 08:48:59,520 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 08:48:59,555 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 08:48:59,555 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 08:48:59,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:48:59 BoogieIcfgContainer [2023-04-01 08:48:59,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 08:48:59,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 08:48:59,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 08:48:59,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 08:48:59,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:48:58" (1/3) ... [2023-04-01 08:48:59,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6aa504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:48:59, skipping insertion in model container [2023-04-01 08:48:59,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:48:59" (2/3) ... [2023-04-01 08:48:59,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6aa504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:48:59, skipping insertion in model container [2023-04-01 08:48:59,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:48:59" (3/3) ... [2023-04-01 08:48:59,568 INFO L112 eAbstractionObserver]: Analyzing ICFG max40-1.i [2023-04-01 08:48:59,582 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 08:48:59,582 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 08:48:59,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 08:48:59,644 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;@2641fc54, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 08:48:59,645 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 08:48:59,648 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 08:48:59,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 08:48:59,653 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:48:59,654 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:48:59,658 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:48:59,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:48:59,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1781608090, now seen corresponding path program 1 times [2023-04-01 08:48:59,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:48:59,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28239279] [2023-04-01 08:48:59,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:48:59,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:48:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:48:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 08:48:59,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:48:59,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28239279] [2023-04-01 08:48:59,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28239279] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:48:59,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:48:59,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 08:48:59,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988999684] [2023-04-01 08:48:59,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:48:59,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:48:59,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:48:59,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:49:00,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 08:49:00,020 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:49:00,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:49:00,068 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2023-04-01 08:49:00,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:49:00,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2023-04-01 08:49:00,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:49:00,075 INFO L225 Difference]: With dead ends: 41 [2023-04-01 08:49:00,075 INFO L226 Difference]: Without dead ends: 20 [2023-04-01 08:49:00,077 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 [2023-04-01 08:49:00,079 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:49:00,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:49:00,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-01 08:49:00,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-01 08:49:00,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:49:00,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-04-01 08:49:00,112 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2023-04-01 08:49:00,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:49:00,113 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-04-01 08:49:00,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:49:00,114 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-04-01 08:49:00,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 08:49:00,115 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:00,116 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:49:00,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 08:49:00,116 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:00,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:00,118 INFO L85 PathProgramCache]: Analyzing trace with hash -676492365, now seen corresponding path program 1 times [2023-04-01 08:49:00,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:00,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984648071] [2023-04-01 08:49:00,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:00,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 08:49:00,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:49:00,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984648071] [2023-04-01 08:49:00,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984648071] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:49:00,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101381304] [2023-04-01 08:49:00,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:00,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:00,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:00,253 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:49:00,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 08:49:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:00,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 08:49:00,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:49:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 08:49:00,407 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 08:49:00,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101381304] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:49:00,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 08:49:00,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 08:49:00,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598155667] [2023-04-01 08:49:00,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:49:00,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:49:00,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:49:00,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:49:00,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:49:00,409 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:49:00,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:49:00,422 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-04-01 08:49:00,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:49:00,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-04-01 08:49:00,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:49:00,423 INFO L225 Difference]: With dead ends: 33 [2023-04-01 08:49:00,423 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 08:49:00,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:49:00,424 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:49:00,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:49:00,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 08:49:00,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 08:49:00,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:49:00,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-04-01 08:49:00,428 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2023-04-01 08:49:00,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:49:00,429 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-04-01 08:49:00,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:49:00,429 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-04-01 08:49:00,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 08:49:00,429 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:00,429 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:49:00,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 08:49:00,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:00,635 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:00,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:00,635 INFO L85 PathProgramCache]: Analyzing trace with hash 167715681, now seen corresponding path program 1 times [2023-04-01 08:49:00,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:00,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902388598] [2023-04-01 08:49:00,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:00,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:00,742 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 08:49:00,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:49:00,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902388598] [2023-04-01 08:49:00,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902388598] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:49:00,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918071287] [2023-04-01 08:49:00,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:00,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:00,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:00,769 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:49:00,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 08:49:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:00,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 08:49:00,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:49:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 08:49:00,844 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 08:49:00,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918071287] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:49:00,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 08:49:00,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 08:49:00,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524543176] [2023-04-01 08:49:00,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:49:00,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:49:00,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:49:00,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:49:00,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:49:00,846 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:49:00,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:49:00,858 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-04-01 08:49:00,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:49:00,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-04-01 08:49:00,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:49:00,859 INFO L225 Difference]: With dead ends: 31 [2023-04-01 08:49:00,859 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 08:49:00,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:49:00,860 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:49:00,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:49:00,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 08:49:00,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 08:49:00,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:49:00,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-04-01 08:49:00,863 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2023-04-01 08:49:00,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:49:00,864 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-04-01 08:49:00,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:49:00,865 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-04-01 08:49:00,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 08:49:00,865 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:00,865 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:49:00,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 08:49:01,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 08:49:01,071 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:01,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:01,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1475217521, now seen corresponding path program 1 times [2023-04-01 08:49:01,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:01,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873044973] [2023-04-01 08:49:01,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:01,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 08:49:01,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:49:01,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873044973] [2023-04-01 08:49:01,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873044973] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:49:01,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608712266] [2023-04-01 08:49:01,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:01,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:01,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:01,178 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:49:01,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 08:49:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:01,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:49:01,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:49:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 08:49:01,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:49:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 08:49:01,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608712266] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:49:01,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1850913001] [2023-04-01 08:49:01,361 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:49:01,361 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:49:01,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:49:01,367 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:49:01,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:49:01,481 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:49:02,134 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 22 for LOIs [2023-04-01 08:49:02,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:49:02,182 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:49:02,813 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '631#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 10) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:49:02,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:49:02,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:49:02,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 08:49:02,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060762003] [2023-04-01 08:49:02,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:49:02,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 08:49:02,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:49:02,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 08:49:02,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-04-01 08:49:02,815 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:49:02,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:49:02,836 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-04-01 08:49:02,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 08:49:02,836 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 29 [2023-04-01 08:49:02,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:49:02,837 INFO L225 Difference]: With dead ends: 40 [2023-04-01 08:49:02,837 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 08:49:02,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-04-01 08:49:02,838 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:49:02,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:49:02,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 08:49:02,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-01 08:49:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:49:02,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-04-01 08:49:02,842 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2023-04-01 08:49:02,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:49:02,842 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-04-01 08:49:02,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:49:02,842 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-04-01 08:49:02,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 08:49:02,843 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:02,843 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:49:02,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 08:49:03,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:03,047 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:03,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:03,047 INFO L85 PathProgramCache]: Analyzing trace with hash -285587484, now seen corresponding path program 2 times [2023-04-01 08:49:03,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:03,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816460705] [2023-04-01 08:49:03,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:03,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:03,113 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 08:49:03,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:49:03,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816460705] [2023-04-01 08:49:03,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816460705] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:49:03,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604786453] [2023-04-01 08:49:03,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:49:03,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:03,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:03,139 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:49:03,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 08:49:03,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 08:49:03,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:49:03,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:49:03,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:49:03,205 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 08:49:03,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:49:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 08:49:03,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604786453] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:49:03,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [37377065] [2023-04-01 08:49:03,227 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:49:03,227 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:49:03,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:49:03,227 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:49:03,227 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:49:03,253 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:49:03,649 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 22 for LOIs [2023-04-01 08:49:03,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:49:03,685 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:49:04,251 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '946#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 10) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:49:04,251 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:49:04,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:49:04,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 08:49:04,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632139038] [2023-04-01 08:49:04,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:49:04,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 08:49:04,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:49:04,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 08:49:04,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-04-01 08:49:04,253 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:49:04,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:49:04,274 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-04-01 08:49:04,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 08:49:04,274 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 32 [2023-04-01 08:49:04,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:49:04,275 INFO L225 Difference]: With dead ends: 42 [2023-04-01 08:49:04,275 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 08:49:04,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-04-01 08:49:04,276 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:49:04,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:49:04,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 08:49:04,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-01 08:49:04,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:49:04,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-04-01 08:49:04,279 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 32 [2023-04-01 08:49:04,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:49:04,279 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-04-01 08:49:04,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:49:04,279 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-04-01 08:49:04,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 08:49:04,280 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:04,280 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:49:04,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 08:49:04,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:04,485 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:04,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:04,485 INFO L85 PathProgramCache]: Analyzing trace with hash 530504940, now seen corresponding path program 3 times [2023-04-01 08:49:04,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:04,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570628691] [2023-04-01 08:49:04,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:04,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-04-01 08:49:04,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:49:04,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570628691] [2023-04-01 08:49:04,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570628691] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:49:04,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090759088] [2023-04-01 08:49:04,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:49:04,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:04,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:04,565 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:49:04,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 08:49:04,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:49:04,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:49:04,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 08:49:04,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:49:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-01 08:49:04,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:49:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-01 08:49:04,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090759088] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:49:04,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [641751346] [2023-04-01 08:49:04,742 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:49:04,742 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:49:04,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:49:04,742 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:49:04,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:49:04,760 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:49:05,082 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 22 for LOIs [2023-04-01 08:49:05,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:49:05,151 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:49:05,736 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1332#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 10) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:49:05,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:49:05,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:49:05,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-04-01 08:49:05,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408403979] [2023-04-01 08:49:05,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:49:05,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 08:49:05,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:49:05,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 08:49:05,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2023-04-01 08:49:05,738 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-01 08:49:05,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:49:05,767 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2023-04-01 08:49:05,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 08:49:05,767 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 41 [2023-04-01 08:49:05,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:49:05,768 INFO L225 Difference]: With dead ends: 53 [2023-04-01 08:49:05,768 INFO L226 Difference]: Without dead ends: 35 [2023-04-01 08:49:05,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2023-04-01 08:49:05,769 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:49:05,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:49:05,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-01 08:49:05,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-04-01 08:49:05,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:49:05,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-04-01 08:49:05,772 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 41 [2023-04-01 08:49:05,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:49:05,772 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-04-01 08:49:05,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-01 08:49:05,773 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-04-01 08:49:05,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 08:49:05,773 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:05,773 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:49:05,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 08:49:05,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:05,979 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:05,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:05,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1755636294, now seen corresponding path program 4 times [2023-04-01 08:49:05,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:05,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331042990] [2023-04-01 08:49:05,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:05,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-01 08:49:06,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:49:06,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331042990] [2023-04-01 08:49:06,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331042990] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:49:06,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031381522] [2023-04-01 08:49:06,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:49:06,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:06,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:06,182 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:49:06,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 08:49:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:06,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 08:49:06,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:49:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-01 08:49:06,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:49:06,440 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-01 08:49:06,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031381522] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:49:06,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [550579201] [2023-04-01 08:49:06,441 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:49:06,441 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:49:06,442 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:49:06,442 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:49:06,442 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:49:06,461 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:49:06,840 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 22 for LOIs [2023-04-01 08:49:06,893 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:49:06,900 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:49:07,468 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1807#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 10) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:49:07,469 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:49:07,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:49:07,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-01 08:49:07,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213674397] [2023-04-01 08:49:07,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:49:07,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 08:49:07,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:49:07,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 08:49:07,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1000, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 08:49:07,471 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:49:07,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:49:07,534 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2023-04-01 08:49:07,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 08:49:07,535 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2023-04-01 08:49:07,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:49:07,535 INFO L225 Difference]: With dead ends: 66 [2023-04-01 08:49:07,535 INFO L226 Difference]: Without dead ends: 47 [2023-04-01 08:49:07,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=332, Invalid=1000, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 08:49:07,537 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:49:07,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:49:07,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-01 08:49:07,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-04-01 08:49:07,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:49:07,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-04-01 08:49:07,542 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 48 [2023-04-01 08:49:07,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:49:07,542 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-04-01 08:49:07,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:49:07,542 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-04-01 08:49:07,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 08:49:07,543 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:07,543 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:49:07,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 08:49:07,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:07,749 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:07,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:07,750 INFO L85 PathProgramCache]: Analyzing trace with hash -229850106, now seen corresponding path program 5 times [2023-04-01 08:49:07,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:07,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089223234] [2023-04-01 08:49:07,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:07,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-01 08:49:08,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:49:08,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089223234] [2023-04-01 08:49:08,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089223234] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:49:08,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697123337] [2023-04-01 08:49:08,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:49:08,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:08,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:08,236 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:49:08,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 08:49:08,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 08:49:08,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:49:08,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 08:49:08,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:49:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-04-01 08:49:08,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:49:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-04-01 08:49:08,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697123337] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:49:08,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [570097815] [2023-04-01 08:49:08,455 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:49:08,455 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:49:08,455 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:49:08,455 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:49:08,455 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:49:08,477 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:49:08,849 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 22 for LOIs [2023-04-01 08:49:08,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:49:08,893 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:49:09,563 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2414#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 10) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:49:09,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:49:09,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:49:09,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-04-01 08:49:09,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413375814] [2023-04-01 08:49:09,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:49:09,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-01 08:49:09,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:49:09,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-01 08:49:09,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1765, Unknown=0, NotChecked=0, Total=2162 [2023-04-01 08:49:09,565 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:49:09,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:49:09,620 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2023-04-01 08:49:09,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-01 08:49:09,621 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 60 [2023-04-01 08:49:09,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:49:09,621 INFO L225 Difference]: With dead ends: 73 [2023-04-01 08:49:09,621 INFO L226 Difference]: Without dead ends: 54 [2023-04-01 08:49:09,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=397, Invalid=1765, Unknown=0, NotChecked=0, Total=2162 [2023-04-01 08:49:09,623 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:49:09,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:49:09,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-01 08:49:09,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-04-01 08:49:09,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:49:09,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2023-04-01 08:49:09,627 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 60 [2023-04-01 08:49:09,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:49:09,627 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2023-04-01 08:49:09,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:49:09,627 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2023-04-01 08:49:09,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 08:49:09,628 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:09,628 INFO L195 NwaCegarLoop]: trace histogram [30, 23, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:49:09,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 08:49:09,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:09,845 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:09,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:09,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1839399571, now seen corresponding path program 6 times [2023-04-01 08:49:09,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:09,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337019037] [2023-04-01 08:49:09,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:09,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:10,520 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-01 08:49:10,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:49:10,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337019037] [2023-04-01 08:49:10,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337019037] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:49:10,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538245901] [2023-04-01 08:49:10,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:49:10,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:10,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:10,529 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:49:10,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 08:49:10,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:49:10,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:49:10,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 08:49:10,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:49:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-01 08:49:10,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:49:11,192 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-01 08:49:11,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538245901] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:49:11,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1311864891] [2023-04-01 08:49:11,194 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:49:11,194 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:49:11,194 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:49:11,194 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:49:11,194 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:49:11,237 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:49:11,542 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 22 for LOIs [2023-04-01 08:49:11,571 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:49:11,573 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:49:12,227 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3171#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 10) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:49:12,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:49:12,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:49:12,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 43 [2023-04-01 08:49:12,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672099813] [2023-04-01 08:49:12,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:49:12,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-04-01 08:49:12,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:49:12,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-04-01 08:49:12,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=935, Invalid=2035, Unknown=0, NotChecked=0, Total=2970 [2023-04-01 08:49:12,230 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 43 states, 43 states have (on average 1.372093023255814) internal successors, (59), 43 states have internal predecessors, (59), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:49:12,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:49:12,274 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2023-04-01 08:49:12,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-04-01 08:49:12,275 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.372093023255814) internal successors, (59), 43 states have internal predecessors, (59), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 79 [2023-04-01 08:49:12,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:49:12,275 INFO L225 Difference]: With dead ends: 96 [2023-04-01 08:49:12,275 INFO L226 Difference]: Without dead ends: 71 [2023-04-01 08:49:12,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 201 SyntacticMatches, 8 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=935, Invalid=2035, Unknown=0, NotChecked=0, Total=2970 [2023-04-01 08:49:12,277 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:49:12,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:49:12,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-04-01 08:49:12,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-04-01 08:49:12,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:49:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2023-04-01 08:49:12,281 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 79 [2023-04-01 08:49:12,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:49:12,281 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2023-04-01 08:49:12,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.372093023255814) internal successors, (59), 43 states have internal predecessors, (59), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:49:12,281 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2023-04-01 08:49:12,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-01 08:49:12,282 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:12,282 INFO L195 NwaCegarLoop]: trace histogram [40, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:49:12,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 08:49:12,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-01 08:49:12,487 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:12,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:12,488 INFO L85 PathProgramCache]: Analyzing trace with hash 948167334, now seen corresponding path program 7 times [2023-04-01 08:49:12,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:12,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126508362] [2023-04-01 08:49:12,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:12,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1357 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2023-04-01 08:49:12,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:49:12,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126508362] [2023-04-01 08:49:12,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126508362] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:49:12,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137714198] [2023-04-01 08:49:12,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:49:12,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:12,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:12,763 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:49:12,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 08:49:12,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:12,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 08:49:12,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:49:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1357 backedges. 244 proven. 55 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2023-04-01 08:49:12,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:49:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1357 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2023-04-01 08:49:13,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137714198] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:49:13,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1410294778] [2023-04-01 08:49:13,134 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:49:13,134 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:49:13,134 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:49:13,134 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:49:13,134 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:49:13,149 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:49:13,470 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 22 for LOIs [2023-04-01 08:49:13,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:49:13,498 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:49:14,087 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4092#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 10) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:49:14,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:49:14,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:49:14,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-01 08:49:14,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560480923] [2023-04-01 08:49:14,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:49:14,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 08:49:14,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:49:14,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 08:49:14,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1000, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 08:49:14,089 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 08:49:14,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:49:14,124 INFO L93 Difference]: Finished difference Result 107 states and 128 transitions. [2023-04-01 08:49:14,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 08:49:14,124 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 96 [2023-04-01 08:49:14,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:49:14,125 INFO L225 Difference]: With dead ends: 107 [2023-04-01 08:49:14,125 INFO L226 Difference]: Without dead ends: 83 [2023-04-01 08:49:14,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=332, Invalid=1000, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 08:49:14,126 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:49:14,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:49:14,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-04-01 08:49:14,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-04-01 08:49:14,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:49:14,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2023-04-01 08:49:14,131 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 96 [2023-04-01 08:49:14,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:49:14,133 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2023-04-01 08:49:14,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 08:49:14,133 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2023-04-01 08:49:14,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-01 08:49:14,138 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:14,138 INFO L195 NwaCegarLoop]: trace histogram [66, 40, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:49:14,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 08:49:14,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 08:49:14,341 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:14,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:14,341 INFO L85 PathProgramCache]: Analyzing trace with hash 535057062, now seen corresponding path program 8 times [2023-04-01 08:49:14,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:14,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776311546] [2023-04-01 08:49:14,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:14,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 0 proven. 1313 refuted. 0 times theorem prover too weak. 1862 trivial. 0 not checked. [2023-04-01 08:49:15,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:49:15,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776311546] [2023-04-01 08:49:15,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776311546] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:49:15,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065403966] [2023-04-01 08:49:15,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:49:15,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:15,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:15,137 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:49:15,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 08:49:15,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 08:49:15,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:49:15,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 08:49:15,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:49:15,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 1062 proven. 3 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2023-04-01 08:49:15,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:49:15,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3172 trivial. 0 not checked. [2023-04-01 08:49:15,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065403966] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:49:15,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1347546190] [2023-04-01 08:49:15,388 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:49:15,388 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:49:15,388 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:49:15,388 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:49:15,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:49:15,421 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:49:15,703 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 22 for LOIs [2023-04-01 08:49:15,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:49:15,732 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:49:16,383 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5281#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 10) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:49:16,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:49:16,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:49:16,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 5, 5] total 31 [2023-04-01 08:49:16,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589391618] [2023-04-01 08:49:16,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:49:16,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-01 08:49:16,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:49:16,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-01 08:49:16,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=1447, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 08:49:16,385 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:49:16,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:49:16,431 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2023-04-01 08:49:16,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-01 08:49:16,431 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 132 [2023-04-01 08:49:16,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:49:16,432 INFO L225 Difference]: With dead ends: 124 [2023-04-01 08:49:16,432 INFO L226 Difference]: Without dead ends: 88 [2023-04-01 08:49:16,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=359, Invalid=1447, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 08:49:16,433 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:49:16,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:49:16,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-04-01 08:49:16,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-04-01 08:49:16,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:49:16,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2023-04-01 08:49:16,438 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 132 [2023-04-01 08:49:16,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:49:16,438 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2023-04-01 08:49:16,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:49:16,438 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2023-04-01 08:49:16,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-04-01 08:49:16,439 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:16,439 INFO L195 NwaCegarLoop]: trace histogram [69, 40, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:49:16,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-04-01 08:49:16,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 08:49:16,639 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:16,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:16,640 INFO L85 PathProgramCache]: Analyzing trace with hash 961368462, now seen corresponding path program 9 times [2023-04-01 08:49:16,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:16,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710081794] [2023-04-01 08:49:16,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:16,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 1973 trivial. 0 not checked. [2023-04-01 08:49:17,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:49:17,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710081794] [2023-04-01 08:49:17,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710081794] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:49:17,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403338750] [2023-04-01 08:49:17,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:49:17,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:17,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:17,337 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:49:17,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 08:49:17,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:49:17,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:49:17,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 08:49:17,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:49:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 1154 proven. 276 refuted. 0 times theorem prover too weak. 1973 trivial. 0 not checked. [2023-04-01 08:49:17,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:49:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 1973 trivial. 0 not checked. [2023-04-01 08:49:18,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403338750] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:49:18,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2101192561] [2023-04-01 08:49:18,098 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:49:18,098 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:49:18,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:49:18,098 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:49:18,098 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:49:18,114 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:49:18,416 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 22 for LOIs [2023-04-01 08:49:18,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:49:18,445 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:49:19,091 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6568#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 10) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:49:19,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:49:19,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:49:19,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 43 [2023-04-01 08:49:19,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79646820] [2023-04-01 08:49:19,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:49:19,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-04-01 08:49:19,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:49:19,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-04-01 08:49:19,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=935, Invalid=2035, Unknown=0, NotChecked=0, Total=2970 [2023-04-01 08:49:19,094 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 08:49:19,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:49:19,138 INFO L93 Difference]: Finished difference Result 146 states and 172 transitions. [2023-04-01 08:49:19,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-04-01 08:49:19,138 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 139 [2023-04-01 08:49:19,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:49:19,139 INFO L225 Difference]: With dead ends: 146 [2023-04-01 08:49:19,139 INFO L226 Difference]: Without dead ends: 105 [2023-04-01 08:49:19,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 381 SyntacticMatches, 8 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=935, Invalid=2035, Unknown=0, NotChecked=0, Total=2970 [2023-04-01 08:49:19,142 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:49:19,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:49:19,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-04-01 08:49:19,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-04-01 08:49:19,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 97 states have internal predecessors, (100), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:49:19,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2023-04-01 08:49:19,159 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 139 [2023-04-01 08:49:19,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:49:19,159 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2023-04-01 08:49:19,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 08:49:19,160 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2023-04-01 08:49:19,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-04-01 08:49:19,161 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:19,161 INFO L195 NwaCegarLoop]: trace histogram [120, 40, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:49:19,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 08:49:19,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 08:49:19,361 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:19,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:19,362 INFO L85 PathProgramCache]: Analyzing trace with hash -592110554, now seen corresponding path program 10 times [2023-04-01 08:49:19,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:19,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766225034] [2023-04-01 08:49:19,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:19,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:19,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8350 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 8329 trivial. 0 not checked. [2023-04-01 08:49:19,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:49:19,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766225034] [2023-04-01 08:49:19,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766225034] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:49:19,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476860159] [2023-04-01 08:49:19,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:49:19,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:19,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:19,749 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:49:19,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 08:49:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:20,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 08:49:20,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:49:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8350 backedges. 3366 proven. 21 refuted. 0 times theorem prover too weak. 4963 trivial. 0 not checked. [2023-04-01 08:49:20,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:49:20,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8350 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 8329 trivial. 0 not checked. [2023-04-01 08:49:20,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476860159] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:49:20,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2067895532] [2023-04-01 08:49:20,204 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:49:20,204 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:49:20,204 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:49:20,204 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:49:20,204 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:49:20,219 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:49:20,490 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 22 for LOIs [2023-04-01 08:49:20,515 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:49:20,517 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:49:21,018 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8213#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 10) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:49:21,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:49:21,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:49:21,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-04-01 08:49:21,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706395379] [2023-04-01 08:49:21,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:49:21,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 08:49:21,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:49:21,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 08:49:21,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2023-04-01 08:49:21,019 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 08:49:21,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:49:21,070 INFO L93 Difference]: Finished difference Result 161 states and 173 transitions. [2023-04-01 08:49:21,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 08:49:21,070 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2023-04-01 08:49:21,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:49:21,072 INFO L225 Difference]: With dead ends: 161 [2023-04-01 08:49:21,072 INFO L226 Difference]: Without dead ends: 113 [2023-04-01 08:49:21,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 551 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2023-04-01 08:49:21,073 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:49:21,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:49:21,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-04-01 08:49:21,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-04-01 08:49:21,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 105 states have internal predecessors, (108), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:49:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2023-04-01 08:49:21,077 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 190 [2023-04-01 08:49:21,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:49:21,077 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2023-04-01 08:49:21,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 08:49:21,078 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2023-04-01 08:49:21,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-04-01 08:49:21,079 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:21,079 INFO L195 NwaCegarLoop]: trace histogram [120, 40, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:49:21,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-04-01 08:49:21,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 08:49:21,284 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:21,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:21,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1793679578, now seen corresponding path program 11 times [2023-04-01 08:49:21,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:21,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576886633] [2023-04-01 08:49:21,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:21,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:21,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8434 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 8329 trivial. 0 not checked. [2023-04-01 08:49:21,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:49:21,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576886633] [2023-04-01 08:49:21,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576886633] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:49:21,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552769463] [2023-04-01 08:49:21,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:49:21,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:21,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:21,881 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:49:21,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 08:49:24,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-04-01 08:49:24,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:49:24,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 08:49:24,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:49:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8434 backedges. 3366 proven. 105 refuted. 0 times theorem prover too weak. 4963 trivial. 0 not checked. [2023-04-01 08:49:24,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:49:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8434 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 8329 trivial. 0 not checked. [2023-04-01 08:49:24,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552769463] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:49:24,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1618576845] [2023-04-01 08:49:24,450 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:49:24,450 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:49:24,451 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:49:24,451 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:49:24,451 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:49:24,466 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:49:24,741 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 22 for LOIs [2023-04-01 08:49:24,770 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:49:24,772 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:49:25,368 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9970#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 10) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:49:25,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:49:25,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:49:25,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-04-01 08:49:25,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349758331] [2023-04-01 08:49:25,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:49:25,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 08:49:25,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:49:25,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 08:49:25,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=1420, Unknown=0, NotChecked=0, Total=1980 [2023-04-01 08:49:25,370 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 08:49:25,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:49:25,410 INFO L93 Difference]: Finished difference Result 177 states and 197 transitions. [2023-04-01 08:49:25,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-01 08:49:25,411 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 198 [2023-04-01 08:49:25,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:49:25,412 INFO L225 Difference]: With dead ends: 177 [2023-04-01 08:49:25,412 INFO L226 Difference]: Without dead ends: 129 [2023-04-01 08:49:25,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=560, Invalid=1420, Unknown=0, NotChecked=0, Total=1980 [2023-04-01 08:49:25,413 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:49:25,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:49:25,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-01 08:49:25,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-04-01 08:49:25,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 121 states have (on average 1.024793388429752) internal successors, (124), 121 states have internal predecessors, (124), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:49:25,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2023-04-01 08:49:25,420 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 198 [2023-04-01 08:49:25,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:49:25,421 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2023-04-01 08:49:25,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 08:49:25,421 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2023-04-01 08:49:25,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-04-01 08:49:25,423 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:25,423 INFO L195 NwaCegarLoop]: trace histogram [120, 40, 30, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:49:25,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 08:49:25,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 08:49:25,623 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:25,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:25,624 INFO L85 PathProgramCache]: Analyzing trace with hash 608216358, now seen corresponding path program 12 times [2023-04-01 08:49:25,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:25,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148366359] [2023-04-01 08:49:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:25,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:25,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 8329 trivial. 0 not checked. [2023-04-01 08:49:26,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:49:26,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148366359] [2023-04-01 08:49:26,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148366359] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:49:26,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226973674] [2023-04-01 08:49:26,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:49:26,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:26,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:26,831 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:49:26,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-01 08:49:27,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:49:27,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:49:27,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-01 08:49:27,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:49:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 3366 proven. 465 refuted. 0 times theorem prover too weak. 4963 trivial. 0 not checked. [2023-04-01 08:49:27,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:49:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 8329 trivial. 0 not checked. [2023-04-01 08:49:27,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226973674] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:49:27,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2121546121] [2023-04-01 08:49:27,864 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:49:27,864 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:49:27,864 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:49:27,864 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:49:27,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:49:27,878 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:49:28,173 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 22 for LOIs [2023-04-01 08:49:28,201 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:49:28,203 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:49:29,000 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11896#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 10) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:49:29,001 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:49:29,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:49:29,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 42 [2023-04-01 08:49:29,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38722249] [2023-04-01 08:49:29,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:49:29,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-04-01 08:49:29,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:49:29,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-04-01 08:49:29,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=893, Invalid=1969, Unknown=0, NotChecked=0, Total=2862 [2023-04-01 08:49:29,003 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 08:49:29,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:49:29,046 INFO L93 Difference]: Finished difference Result 186 states and 199 transitions. [2023-04-01 08:49:29,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-04-01 08:49:29,047 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 214 [2023-04-01 08:49:29,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:49:29,048 INFO L225 Difference]: With dead ends: 186 [2023-04-01 08:49:29,048 INFO L226 Difference]: Without dead ends: 138 [2023-04-01 08:49:29,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 599 SyntacticMatches, 23 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=893, Invalid=1969, Unknown=0, NotChecked=0, Total=2862 [2023-04-01 08:49:29,049 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:49:29,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:49:29,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-04-01 08:49:29,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2023-04-01 08:49:29,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:49:29,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2023-04-01 08:49:29,056 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 214 [2023-04-01 08:49:29,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:49:29,056 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2023-04-01 08:49:29,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 08:49:29,056 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2023-04-01 08:49:29,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-04-01 08:49:29,057 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:29,057 INFO L195 NwaCegarLoop]: trace histogram [120, 40, 39, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:49:29,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-01 08:49:29,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:29,264 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:29,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:29,265 INFO L85 PathProgramCache]: Analyzing trace with hash 642697580, now seen corresponding path program 13 times [2023-04-01 08:49:29,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:29,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998935971] [2023-04-01 08:49:29,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:29,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms