/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/array-crafted/mapavg2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 20:49:33,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 20:49:33,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 20:49:33,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 20:49:33,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 20:49:33,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 20:49:33,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 20:49:33,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 20:49:33,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 20:49:33,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 20:49:33,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 20:49:33,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 20:49:33,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 20:49:33,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 20:49:33,498 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 20:49:33,499 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 20:49:33,500 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 20:49:33,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 20:49:33,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 20:49:33,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 20:49:33,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 20:49:33,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 20:49:33,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 20:49:33,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 20:49:33,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 20:49:33,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 20:49:33,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 20:49:33,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 20:49:33,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 20:49:33,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 20:49:33,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 20:49:33,517 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 20:49:33,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 20:49:33,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 20:49:33,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 20:49:33,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 20:49:33,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 20:49:33,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 20:49:33,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 20:49:33,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 20:49:33,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 20:49:33,522 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 20:49:33,543 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 20:49:33,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 20:49:33,544 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 20:49:33,544 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 20:49:33,544 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 20:49:33,544 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 20:49:33,544 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 20:49:33,545 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 20:49:33,545 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 20:49:33,545 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 20:49:33,545 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 20:49:33,545 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 20:49:33,545 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 20:49:33,546 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 20:49:33,546 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 20:49:33,546 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 20:49:33,546 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 20:49:33,546 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 20:49:33,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 20:49:33,547 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 20:49:33,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 20:49:33,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 20:49:33,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 20:49:33,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 20:49:33,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 20:49:33,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 20:49:33,547 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 20:49:33,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 20:49:33,547 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 20:49:33,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 20:49:33,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 20:49:33,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 20:49:33,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:49:33,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 20:49:33,548 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 20:49:33,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 20:49:33,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 20:49:33,548 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 20:49:33,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 20:49:33,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 20:49:33,548 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 20:49:33,548 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 20:49:33,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 20:49:33,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 20:49:33,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 20:49:33,741 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 20:49:33,742 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 20:49:33,742 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/mapavg2.i [2023-03-31 20:49:34,766 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 20:49:34,945 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 20:49:34,946 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapavg2.i [2023-03-31 20:49:34,950 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57df826a2/8d5882c87c464215b2e51165a42591b9/FLAG796f5377f [2023-03-31 20:49:35,345 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57df826a2/8d5882c87c464215b2e51165a42591b9 [2023-03-31 20:49:35,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 20:49:35,347 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 20:49:35,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 20:49:35,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 20:49:35,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 20:49:35,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:49:35" (1/1) ... [2023-03-31 20:49:35,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47269f84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:49:35, skipping insertion in model container [2023-03-31 20:49:35,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:49:35" (1/1) ... [2023-03-31 20:49:35,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 20:49:35,365 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 20:49:35,505 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapavg2.i[1313,1326] [2023-03-31 20:49:35,513 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:49:35,520 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 20:49:35,545 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/array-crafted/mapavg2.i[1313,1326] [2023-03-31 20:49:35,549 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:49:35,558 INFO L208 MainTranslator]: Completed translation [2023-03-31 20:49:35,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:49:35 WrapperNode [2023-03-31 20:49:35,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 20:49:35,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 20:49:35,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 20:49:35,560 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 20:49:35,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:49:35" (1/1) ... [2023-03-31 20:49:35,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:49:35" (1/1) ... [2023-03-31 20:49:35,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:49:35" (1/1) ... [2023-03-31 20:49:35,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:49:35" (1/1) ... [2023-03-31 20:49:35,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:49:35" (1/1) ... [2023-03-31 20:49:35,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:49:35" (1/1) ... [2023-03-31 20:49:35,598 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:49:35" (1/1) ... [2023-03-31 20:49:35,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:49:35" (1/1) ... [2023-03-31 20:49:35,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 20:49:35,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 20:49:35,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 20:49:35,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 20:49:35,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:49:35" (1/1) ... [2023-03-31 20:49:35,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:49:35,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:35,658 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 20:49:35,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 20:49:35,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 20:49:35,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 20:49:35,691 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 20:49:35,691 INFO L138 BoogieDeclarations]: Found implementation of procedure mapavg [2023-03-31 20:49:35,691 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 20:49:35,691 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 20:49:35,691 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 20:49:35,691 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 20:49:35,692 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 20:49:35,692 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 20:49:35,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 20:49:35,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 20:49:35,692 INFO L130 BoogieDeclarations]: Found specification of procedure mapavg [2023-03-31 20:49:35,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 20:49:35,692 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 20:49:35,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 20:49:35,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 20:49:35,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 20:49:35,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 20:49:35,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 20:49:35,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 20:49:35,742 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 20:49:35,743 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 20:49:35,914 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 20:49:35,938 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 20:49:35,938 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-31 20:49:35,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:49:35 BoogieIcfgContainer [2023-03-31 20:49:35,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 20:49:35,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 20:49:35,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 20:49:35,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 20:49:35,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 08:49:35" (1/3) ... [2023-03-31 20:49:35,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42005423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:49:35, skipping insertion in model container [2023-03-31 20:49:35,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:49:35" (2/3) ... [2023-03-31 20:49:35,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42005423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:49:35, skipping insertion in model container [2023-03-31 20:49:35,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:49:35" (3/3) ... [2023-03-31 20:49:35,945 INFO L112 eAbstractionObserver]: Analyzing ICFG mapavg2.i [2023-03-31 20:49:35,956 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 20:49:35,956 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 20:49:35,992 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 20:49:35,996 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;@519f33ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 20:49:35,996 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 20:49:35,999 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) [2023-03-31 20:49:36,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-31 20:49:36,004 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:36,004 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] [2023-03-31 20:49:36,004 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:36,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:36,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1758032332, now seen corresponding path program 1 times [2023-03-31 20:49:36,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:36,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249154335] [2023-03-31 20:49:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:36,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 20:49:36,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:36,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249154335] [2023-03-31 20:49:36,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249154335] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:49:36,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:49:36,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 20:49:36,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213357244] [2023-03-31 20:49:36,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:49:36,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 20:49:36,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:49:36,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 20:49:36,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:49:36,331 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) [2023-03-31 20:49:36,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:49:36,381 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2023-03-31 20:49:36,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 20:49:36,383 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 [2023-03-31 20:49:36,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:49:36,396 INFO L225 Difference]: With dead ends: 41 [2023-03-31 20:49:36,396 INFO L226 Difference]: Without dead ends: 20 [2023-03-31 20:49:36,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:49:36,401 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 [2023-03-31 20:49:36,402 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] [2023-03-31 20:49:36,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-03-31 20:49:36,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-03-31 20:49:36,432 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) [2023-03-31 20:49:36,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-03-31 20:49:36,435 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2023-03-31 20:49:36,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:49:36,436 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-03-31 20:49:36,437 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) [2023-03-31 20:49:36,437 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-03-31 20:49:36,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 20:49:36,439 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:36,439 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] [2023-03-31 20:49:36,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 20:49:36,440 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:36,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:36,441 INFO L85 PathProgramCache]: Analyzing trace with hash -2136114728, now seen corresponding path program 1 times [2023-03-31 20:49:36,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:36,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110469830] [2023-03-31 20:49:36,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:36,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:36,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 20:49:36,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:36,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110469830] [2023-03-31 20:49:36,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110469830] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:49:36,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111725680] [2023-03-31 20:49:36,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:36,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:36,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:36,604 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:49:36,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 20:49:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:36,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-31 20:49:36,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:49:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 20:49:36,709 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:49:36,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111725680] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:49:36,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 20:49:36,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-03-31 20:49:36,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244188566] [2023-03-31 20:49:36,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:49:36,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 20:49:36,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:49:36,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 20:49:36,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 20:49:36,719 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) [2023-03-31 20:49:36,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:49:36,748 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-03-31 20:49:36,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 20:49:36,749 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 [2023-03-31 20:49:36,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:49:36,751 INFO L225 Difference]: With dead ends: 33 [2023-03-31 20:49:36,751 INFO L226 Difference]: Without dead ends: 21 [2023-03-31 20:49:36,751 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 [2023-03-31 20:49:36,752 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 [2023-03-31 20:49:36,752 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] [2023-03-31 20:49:36,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-03-31 20:49:36,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-03-31 20:49:36,756 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) [2023-03-31 20:49:36,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-03-31 20:49:36,756 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2023-03-31 20:49:36,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:49:36,757 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-03-31 20:49:36,757 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) [2023-03-31 20:49:36,757 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-03-31 20:49:36,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-03-31 20:49:36,757 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:36,757 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] [2023-03-31 20:49:36,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 20:49:36,967 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 [2023-03-31 20:49:36,968 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:36,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:36,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1667861185, now seen corresponding path program 1 times [2023-03-31 20:49:36,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:36,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998842277] [2023-03-31 20:49:36,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:36,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-31 20:49:37,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:37,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998842277] [2023-03-31 20:49:37,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998842277] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:49:37,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021581363] [2023-03-31 20:49:37,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:37,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:37,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:37,091 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:49:37,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 20:49:37,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:37,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-31 20:49:37,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:49:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 20:49:37,182 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:49:37,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021581363] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:49:37,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 20:49:37,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-03-31 20:49:37,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319090110] [2023-03-31 20:49:37,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:49:37,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 20:49:37,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:49:37,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 20:49:37,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 20:49:37,183 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) [2023-03-31 20:49:37,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:49:37,200 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-03-31 20:49:37,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 20:49:37,201 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 [2023-03-31 20:49:37,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:49:37,201 INFO L225 Difference]: With dead ends: 31 [2023-03-31 20:49:37,201 INFO L226 Difference]: Without dead ends: 22 [2023-03-31 20:49:37,201 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 [2023-03-31 20:49:37,202 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 [2023-03-31 20:49:37,202 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] [2023-03-31 20:49:37,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-03-31 20:49:37,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-03-31 20:49:37,205 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) [2023-03-31 20:49:37,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-03-31 20:49:37,205 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2023-03-31 20:49:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:49:37,206 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-03-31 20:49:37,207 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) [2023-03-31 20:49:37,207 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-03-31 20:49:37,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-31 20:49:37,207 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:37,207 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] [2023-03-31 20:49:37,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 20:49:37,412 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 [2023-03-31 20:49:37,412 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:37,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:37,413 INFO L85 PathProgramCache]: Analyzing trace with hash -636160548, now seen corresponding path program 1 times [2023-03-31 20:49:37,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:37,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481851565] [2023-03-31 20:49:37,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:37,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-31 20:49:37,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:37,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481851565] [2023-03-31 20:49:37,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481851565] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:49:37,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870692954] [2023-03-31 20:49:37,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:37,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:37,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:37,507 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:49:37,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 20:49:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:37,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 20:49:37,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:49:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-31 20:49:37,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:49:37,613 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-31 20:49:37,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870692954] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:49:37,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1294037188] [2023-03-31 20:49:37,626 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:49:37,627 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:49:37,629 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:49:37,631 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:49:37,632 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:49:37,673 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:49:38,039 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 12 for LOIs [2023-03-31 20:49:38,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:49:38,067 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:49:38,549 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '631#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 1000 main_~i~1) (= |#NULL.offset| 0) (<= 999 main_~i~2) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:49:38,550 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:49:38,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:49:38,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-03-31 20:49:38,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164957671] [2023-03-31 20:49:38,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:49:38,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 20:49:38,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:49:38,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 20:49:38,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-03-31 20:49:38,552 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) [2023-03-31 20:49:38,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:49:38,579 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-03-31 20:49:38,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 20:49:38,594 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 [2023-03-31 20:49:38,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:49:38,595 INFO L225 Difference]: With dead ends: 40 [2023-03-31 20:49:38,595 INFO L226 Difference]: Without dead ends: 25 [2023-03-31 20:49:38,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-03-31 20:49:38,596 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 [2023-03-31 20:49:38,596 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] [2023-03-31 20:49:38,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-03-31 20:49:38,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-03-31 20:49:38,599 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) [2023-03-31 20:49:38,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-03-31 20:49:38,599 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2023-03-31 20:49:38,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:49:38,600 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-03-31 20:49:38,600 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) [2023-03-31 20:49:38,600 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-03-31 20:49:38,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-03-31 20:49:38,600 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:38,600 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] [2023-03-31 20:49:38,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 20:49:38,807 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 [2023-03-31 20:49:38,808 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:38,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:38,808 INFO L85 PathProgramCache]: Analyzing trace with hash 539477304, now seen corresponding path program 2 times [2023-03-31 20:49:38,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:38,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795716624] [2023-03-31 20:49:38,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:38,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-31 20:49:38,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:38,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795716624] [2023-03-31 20:49:38,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795716624] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:49:38,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985825712] [2023-03-31 20:49:38,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:49:38,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:38,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:38,921 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:49:38,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 20:49:38,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 20:49:38,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:49:38,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 20:49:38,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:49:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-31 20:49:39,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:49:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-31 20:49:39,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985825712] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:49:39,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2054957066] [2023-03-31 20:49:39,039 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:49:39,039 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:49:39,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:49:39,040 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:49:39,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:49:39,054 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:49:39,220 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 12 for LOIs [2023-03-31 20:49:39,234 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:49:39,236 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:49:39,623 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '950#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 1000 main_~i~1) (= |#NULL.offset| 0) (<= 999 main_~i~2) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:49:39,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:49:39,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:49:39,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-03-31 20:49:39,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969195513] [2023-03-31 20:49:39,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:49:39,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 20:49:39,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:49:39,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 20:49:39,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-03-31 20:49:39,625 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) [2023-03-31 20:49:39,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:49:39,644 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-03-31 20:49:39,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 20:49:39,644 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 [2023-03-31 20:49:39,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:49:39,645 INFO L225 Difference]: With dead ends: 42 [2023-03-31 20:49:39,645 INFO L226 Difference]: Without dead ends: 28 [2023-03-31 20:49:39,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-03-31 20:49:39,646 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 [2023-03-31 20:49:39,646 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] [2023-03-31 20:49:39,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-03-31 20:49:39,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-03-31 20:49:39,649 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) [2023-03-31 20:49:39,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-03-31 20:49:39,649 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 32 [2023-03-31 20:49:39,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:49:39,649 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-03-31 20:49:39,650 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) [2023-03-31 20:49:39,650 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-03-31 20:49:39,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-03-31 20:49:39,650 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:39,650 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] [2023-03-31 20:49:39,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-03-31 20:49:39,861 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 [2023-03-31 20:49:39,861 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:39,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:39,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1310781763, now seen corresponding path program 3 times [2023-03-31 20:49:39,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:39,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658608477] [2023-03-31 20:49:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:39,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-03-31 20:49:39,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:39,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658608477] [2023-03-31 20:49:39,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658608477] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:49:39,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941107350] [2023-03-31 20:49:39,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:49:39,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:39,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:39,913 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:49:39,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 20:49:39,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:49:39,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:49:39,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 20:49:39,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:49:40,006 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-03-31 20:49:40,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:49:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-03-31 20:49:40,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941107350] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:49:40,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1300216429] [2023-03-31 20:49:40,056 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:49:40,057 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:49:40,057 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:49:40,057 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:49:40,057 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:49:40,067 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:49:40,284 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 12 for LOIs [2023-03-31 20:49:40,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:49:40,300 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:49:40,709 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1340#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 1000 main_~i~1) (= |#NULL.offset| 0) (<= 999 main_~i~2) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:49:40,709 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:49:40,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:49:40,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-03-31 20:49:40,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208172735] [2023-03-31 20:49:40,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:49:40,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 20:49:40,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:49:40,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 20:49:40,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=713, Unknown=8, NotChecked=0, Total=870 [2023-03-31 20:49:40,711 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) [2023-03-31 20:49:40,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:49:40,744 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2023-03-31 20:49:40,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 20:49:40,744 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 [2023-03-31 20:49:40,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:49:40,745 INFO L225 Difference]: With dead ends: 53 [2023-03-31 20:49:40,745 INFO L226 Difference]: Without dead ends: 35 [2023-03-31 20:49:40,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=713, Unknown=8, NotChecked=0, Total=870 [2023-03-31 20:49:40,746 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:49:40,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:49:40,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-03-31 20:49:40,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-03-31 20:49:40,749 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) [2023-03-31 20:49:40,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-03-31 20:49:40,750 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 41 [2023-03-31 20:49:40,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:49:40,750 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-03-31 20:49:40,750 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) [2023-03-31 20:49:40,750 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-03-31 20:49:40,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-03-31 20:49:40,751 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:40,751 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] [2023-03-31 20:49:40,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 20:49:40,975 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 [2023-03-31 20:49:40,975 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:40,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:40,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1851771436, now seen corresponding path program 4 times [2023-03-31 20:49:40,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:40,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812548956] [2023-03-31 20:49:40,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:40,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-03-31 20:49:41,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:41,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812548956] [2023-03-31 20:49:41,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812548956] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:49:41,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601757176] [2023-03-31 20:49:41,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:49:41,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:41,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:41,156 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:49:41,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 20:49:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:41,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 20:49:41,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:49:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-03-31 20:49:41,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:49:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-03-31 20:49:41,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601757176] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:49:41,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1783658344] [2023-03-31 20:49:41,445 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:49:41,445 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:49:41,445 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:49:41,445 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:49:41,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:49:41,455 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:49:41,620 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 12 for LOIs [2023-03-31 20:49:41,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:49:41,636 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:49:42,075 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1819#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 1000 main_~i~1) (= |#NULL.offset| 0) (<= 999 main_~i~2) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:49:42,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:49:42,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:49:42,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-03-31 20:49:42,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978865037] [2023-03-31 20:49:42,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:49:42,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-03-31 20:49:42,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:49:42,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-03-31 20:49:42,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=1254, Unknown=8, NotChecked=0, Total=1640 [2023-03-31 20:49:42,077 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) [2023-03-31 20:49:42,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:49:42,102 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2023-03-31 20:49:42,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-03-31 20:49:42,103 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 [2023-03-31 20:49:42,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:49:42,103 INFO L225 Difference]: With dead ends: 66 [2023-03-31 20:49:42,103 INFO L226 Difference]: Without dead ends: 47 [2023-03-31 20:49:42,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=1254, Unknown=8, NotChecked=0, Total=1640 [2023-03-31 20:49:42,104 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:49:42,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:49:42,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-03-31 20:49:42,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-03-31 20:49:42,108 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) [2023-03-31 20:49:42,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-03-31 20:49:42,117 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 48 [2023-03-31 20:49:42,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:49:42,117 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-03-31 20:49:42,117 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) [2023-03-31 20:49:42,117 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-03-31 20:49:42,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-03-31 20:49:42,118 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:42,118 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] [2023-03-31 20:49:42,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-03-31 20:49:42,323 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 [2023-03-31 20:49:42,323 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:42,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:42,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1977020204, now seen corresponding path program 5 times [2023-03-31 20:49:42,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:42,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642531269] [2023-03-31 20:49:42,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:42,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-03-31 20:49:42,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:42,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642531269] [2023-03-31 20:49:42,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642531269] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:49:42,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551904453] [2023-03-31 20:49:42,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:49:42,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:42,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:42,897 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) [2023-03-31 20:49:42,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 20:49:42,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 20:49:42,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:49:42,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 20:49:42,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:49:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-03-31 20:49:43,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:49:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-03-31 20:49:43,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551904453] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:49:43,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1861754673] [2023-03-31 20:49:43,138 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:49:43,138 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:49:43,138 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:49:43,139 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:49:43,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:49:43,149 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:49:43,295 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 12 for LOIs [2023-03-31 20:49:43,308 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:49:43,310 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:49:43,854 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2430#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 1000 main_~i~1) (= |#NULL.offset| 0) (<= 999 main_~i~2) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:49:43,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:49:43,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:49:43,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-03-31 20:49:43,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890985956] [2023-03-31 20:49:43,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:49:43,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-03-31 20:49:43,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:49:43,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-03-31 20:49:43,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=2099, Unknown=8, NotChecked=0, Total=2550 [2023-03-31 20:49:43,857 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) [2023-03-31 20:49:43,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:49:43,910 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2023-03-31 20:49:43,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-03-31 20:49:43,911 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 [2023-03-31 20:49:43,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:49:43,911 INFO L225 Difference]: With dead ends: 73 [2023-03-31 20:49:43,911 INFO L226 Difference]: Without dead ends: 54 [2023-03-31 20:49:43,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=443, Invalid=2099, Unknown=8, NotChecked=0, Total=2550 [2023-03-31 20:49:43,913 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:49:43,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:49:43,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-03-31 20:49:43,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-03-31 20:49:43,916 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) [2023-03-31 20:49:43,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2023-03-31 20:49:43,916 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 60 [2023-03-31 20:49:43,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:49:43,916 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2023-03-31 20:49:43,917 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) [2023-03-31 20:49:43,917 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2023-03-31 20:49:43,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-03-31 20:49:43,917 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:43,917 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] [2023-03-31 20:49:43,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-03-31 20:49:44,122 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 [2023-03-31 20:49:44,122 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:44,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:44,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1923610536, now seen corresponding path program 6 times [2023-03-31 20:49:44,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:44,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325415395] [2023-03-31 20:49:44,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:44,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-03-31 20:49:44,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:44,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325415395] [2023-03-31 20:49:44,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325415395] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:49:44,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714885259] [2023-03-31 20:49:44,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:49:44,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:44,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:44,689 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) [2023-03-31 20:49:44,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 20:49:44,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:49:44,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:49:44,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 25 conjunts are in the unsatisfiable core [2023-03-31 20:49:44,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:49:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-03-31 20:49:44,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:49:45,476 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-03-31 20:49:45,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714885259] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:49:45,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1763310622] [2023-03-31 20:49:45,478 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:49:45,478 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:49:45,478 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:49:45,478 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:49:45,478 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:49:45,488 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:49:45,693 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 12 for LOIs [2023-03-31 20:49:45,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:49:45,708 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:49:46,268 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3199#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 1000 main_~i~1) (= |#NULL.offset| 0) (<= 999 main_~i~2) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:49:46,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:49:46,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:49:46,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-03-31 20:49:46,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344839456] [2023-03-31 20:49:46,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:49:46,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-03-31 20:49:46,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:49:46,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-03-31 20:49:46,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1353, Invalid=3061, Unknown=8, NotChecked=0, Total=4422 [2023-03-31 20:49:46,272 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 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) [2023-03-31 20:49:46,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:49:46,348 INFO L93 Difference]: Finished difference Result 104 states and 136 transitions. [2023-03-31 20:49:46,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-03-31 20:49:46,349 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 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 [2023-03-31 20:49:46,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:49:46,349 INFO L225 Difference]: With dead ends: 104 [2023-03-31 20:49:46,350 INFO L226 Difference]: Without dead ends: 79 [2023-03-31 20:49:46,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1353, Invalid=3061, Unknown=8, NotChecked=0, Total=4422 [2023-03-31 20:49:46,352 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:49:46,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:49:46,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-03-31 20:49:46,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-03-31 20:49:46,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 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) [2023-03-31 20:49:46,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2023-03-31 20:49:46,360 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 79 [2023-03-31 20:49:46,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:49:46,360 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2023-03-31 20:49:46,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 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) [2023-03-31 20:49:46,360 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2023-03-31 20:49:46,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-03-31 20:49:46,361 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:46,361 INFO L195 NwaCegarLoop]: trace histogram [48, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:49:46,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-31 20:49:46,566 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 [2023-03-31 20:49:46,567 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:46,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:46,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1790244300, now seen corresponding path program 7 times [2023-03-31 20:49:46,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:46,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597997376] [2023-03-31 20:49:46,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:46,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:48,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-03-31 20:49:48,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:48,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597997376] [2023-03-31 20:49:48,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597997376] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:49:48,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897644383] [2023-03-31 20:49:48,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:49:48,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:48,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:48,205 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) [2023-03-31 20:49:48,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 20:49:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:48,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 50 conjunts are in the unsatisfiable core [2023-03-31 20:49:48,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:49:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-03-31 20:49:48,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:49:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-03-31 20:49:50,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897644383] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:49:50,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [453629661] [2023-03-31 20:49:50,688 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:49:50,688 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:49:50,688 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:49:50,688 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:49:50,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:49:50,722 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:49:50,890 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 12 for LOIs [2023-03-31 20:49:50,902 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:49:50,904 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:49:51,473 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4280#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 1000 main_~i~1) (= |#NULL.offset| 0) (<= 999 main_~i~2) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:49:51,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:49:51,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:49:51,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-03-31 20:49:51,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878900616] [2023-03-31 20:49:51,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:49:51,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-03-31 20:49:51,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:49:51,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-03-31 20:49:51,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5128, Invalid=8436, Unknown=8, NotChecked=0, Total=13572 [2023-03-31 20:49:51,478 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 101 states have internal predecessors, (116), 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) [2023-03-31 20:49:51,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:49:51,635 INFO L93 Difference]: Finished difference Result 154 states and 211 transitions. [2023-03-31 20:49:51,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-03-31 20:49:51,636 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 101 states have internal predecessors, (116), 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 104 [2023-03-31 20:49:51,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:49:51,637 INFO L225 Difference]: With dead ends: 154 [2023-03-31 20:49:51,637 INFO L226 Difference]: Without dead ends: 129 [2023-03-31 20:49:51,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2582 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5128, Invalid=8436, Unknown=8, NotChecked=0, Total=13572 [2023-03-31 20:49:51,640 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:49:51,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:49:51,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-03-31 20:49:51,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-03-31 20:49:51,646 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) [2023-03-31 20:49:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2023-03-31 20:49:51,647 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 104 [2023-03-31 20:49:51,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:49:51,647 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2023-03-31 20:49:51,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 101 states have internal predecessors, (116), 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) [2023-03-31 20:49:51,647 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2023-03-31 20:49:51,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-03-31 20:49:51,648 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:51,648 INFO L195 NwaCegarLoop]: trace histogram [98, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:49:51,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-31 20:49:51,855 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 [2023-03-31 20:49:51,855 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:51,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:51,855 INFO L85 PathProgramCache]: Analyzing trace with hash -525538636, now seen corresponding path program 8 times [2023-03-31 20:49:51,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:51,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357358951] [2023-03-31 20:49:51,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:51,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-03-31 20:49:56,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:56,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357358951] [2023-03-31 20:49:56,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357358951] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:49:56,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118789742] [2023-03-31 20:49:56,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:49:56,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:56,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:56,734 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) [2023-03-31 20:49:56,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-31 20:49:56,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 20:49:56,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:49:56,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 20:49:56,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:49:57,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 5139 trivial. 0 not checked. [2023-03-31 20:49:57,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:49:57,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5385 trivial. 0 not checked. [2023-03-31 20:49:57,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118789742] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:49:57,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2016852347] [2023-03-31 20:49:57,145 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:49:57,145 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:49:57,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:49:57,145 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:49:57,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:49:57,164 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:49:57,333 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 12 for LOIs [2023-03-31 20:49:57,345 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:49:57,347 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:49:58,421 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5867#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 1000 main_~i~1) (= |#NULL.offset| 0) (<= 999 main_~i~2) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:49:58,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:49:58,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:49:58,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 107 [2023-03-31 20:49:58,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302588733] [2023-03-31 20:49:58,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:49:58,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-03-31 20:49:58,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:49:58,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-03-31 20:49:58,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5155, Invalid=9843, Unknown=8, NotChecked=0, Total=15006 [2023-03-31 20:49:58,426 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand has 107 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 107 states have internal predecessors, (126), 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) [2023-03-31 20:49:58,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:49:58,543 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2023-03-31 20:49:58,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-03-31 20:49:58,543 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 107 states have internal predecessors, (126), 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 154 [2023-03-31 20:49:58,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:49:58,544 INFO L225 Difference]: With dead ends: 159 [2023-03-31 20:49:58,544 INFO L226 Difference]: Without dead ends: 134 [2023-03-31 20:49:58,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2306 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5155, Invalid=9843, Unknown=8, NotChecked=0, Total=15006 [2023-03-31 20:49:58,546 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:49:58,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 121 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:49:58,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-03-31 20:49:58,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2023-03-31 20:49:58,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 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) [2023-03-31 20:49:58,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2023-03-31 20:49:58,551 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 154 [2023-03-31 20:49:58,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:49:58,552 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2023-03-31 20:49:58,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 107 states have internal predecessors, (126), 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) [2023-03-31 20:49:58,552 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2023-03-31 20:49:58,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-03-31 20:49:58,553 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:58,553 INFO L195 NwaCegarLoop]: trace histogram [99, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:49:58,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-31 20:49:58,758 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 [2023-03-31 20:49:58,759 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:58,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:58,759 INFO L85 PathProgramCache]: Analyzing trace with hash 370755352, now seen corresponding path program 9 times [2023-03-31 20:49:58,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:58,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891269618] [2023-03-31 20:49:58,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:58,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:50:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2023-03-31 20:50:02,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:50:02,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891269618] [2023-03-31 20:50:02,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891269618] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:50:02,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358295831] [2023-03-31 20:50:02,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:50:02,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:50:02,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:50:02,513 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) [2023-03-31 20:50:02,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-31 20:50:02,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:50:02,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:50:02,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 1224 conjuncts, 101 conjunts are in the unsatisfiable core [2023-03-31 20:50:02,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:50:02,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2023-03-31 20:50:02,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:50:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2023-03-31 20:50:11,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358295831] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:50:11,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [263444439] [2023-03-31 20:50:11,108 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:50:11,108 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:50:11,108 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:50:11,109 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:50:11,109 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:50:11,116 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:50:11,273 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 12 for LOIs [2023-03-31 20:50:11,283 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:50:11,285 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:50:12,135 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7600#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 1000 main_~i~1) (= |#NULL.offset| 0) (<= 999 main_~i~2) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:50:12,136 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:50:12,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:50:12,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2023-03-31 20:50:12,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034922894] [2023-03-31 20:50:12,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:50:12,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-03-31 20:50:12,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:50:12,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-03-31 20:50:12,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20581, Invalid=27153, Unknown=8, NotChecked=0, Total=47742 [2023-03-31 20:50:12,143 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand has 203 states, 203 states have (on average 1.0738916256157636) internal successors, (218), 203 states have internal predecessors, (218), 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) [2023-03-31 20:50:12,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:50:12,397 INFO L93 Difference]: Finished difference Result 264 states and 372 transitions. [2023-03-31 20:50:12,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-03-31 20:50:12,397 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0738916256157636) internal successors, (218), 203 states have internal predecessors, (218), 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 159 [2023-03-31 20:50:12,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:50:12,399 INFO L225 Difference]: With dead ends: 264 [2023-03-31 20:50:12,399 INFO L226 Difference]: Without dead ends: 235 [2023-03-31 20:50:12,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5234 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=20581, Invalid=27153, Unknown=8, NotChecked=0, Total=47742 [2023-03-31 20:50:12,403 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:50:12,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:50:12,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-03-31 20:50:12,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2023-03-31 20:50:12,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 227 states have (on average 1.013215859030837) internal successors, (230), 227 states have internal predecessors, (230), 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) [2023-03-31 20:50:12,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 239 transitions. [2023-03-31 20:50:12,412 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 239 transitions. Word has length 159 [2023-03-31 20:50:12,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:50:12,412 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 239 transitions. [2023-03-31 20:50:12,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0738916256157636) internal successors, (218), 203 states have internal predecessors, (218), 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) [2023-03-31 20:50:12,413 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 239 transitions. [2023-03-31 20:50:12,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-03-31 20:50:12,414 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:50:12,414 INFO L195 NwaCegarLoop]: trace histogram [200, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:50:12,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-03-31 20:50:12,620 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 [2023-03-31 20:50:12,621 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:50:12,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:50:12,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1778293748, now seen corresponding path program 10 times [2023-03-31 20:50:12,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:50:12,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815127895] [2023-03-31 20:50:12,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:50:12,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:50:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:50:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 20655 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2023-03-31 20:50:29,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:50:29,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815127895] [2023-03-31 20:50:29,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815127895] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:50:29,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845427607] [2023-03-31 20:50:29,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:50:29,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:50:29,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:50:29,086 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) [2023-03-31 20:50:29,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-03-31 20:50:29,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:50:29,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 2133 conjuncts, 202 conjunts are in the unsatisfiable core [2023-03-31 20:50:29,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:50:29,800 INFO L134 CoverageAnalysis]: Checked inductivity of 20655 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2023-03-31 20:50:29,800 INFO L327 TraceCheckSpWp]: Computing backward predicates...