/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/array-programs/partial_mod_count_5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 08:53:09,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 08:53:09,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 08:53:09,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 08:53:09,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 08:53:09,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 08:53:09,381 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 08:53:09,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 08:53:09,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 08:53:09,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 08:53:09,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 08:53:09,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 08:53:09,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 08:53:09,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 08:53:09,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 08:53:09,388 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 08:53:09,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 08:53:09,394 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 08:53:09,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 08:53:09,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 08:53:09,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 08:53:09,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 08:53:09,407 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 08:53:09,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 08:53:09,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 08:53:09,411 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 08:53:09,411 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 08:53:09,412 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 08:53:09,412 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 08:53:09,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 08:53:09,413 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 08:53:09,413 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 08:53:09,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 08:53:09,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 08:53:09,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 08:53:09,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 08:53:09,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 08:53:09,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 08:53:09,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 08:53:09,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 08:53:09,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 08:53:09,418 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 08:53:09,444 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 08:53:09,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 08:53:09,444 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 08:53:09,444 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 08:53:09,445 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 08:53:09,445 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 08:53:09,445 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 08:53:09,445 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 08:53:09,445 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 08:53:09,445 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 08:53:09,446 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 08:53:09,446 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 08:53:09,446 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 08:53:09,446 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 08:53:09,446 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 08:53:09,446 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 08:53:09,446 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 08:53:09,446 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 08:53:09,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 08:53:09,447 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 08:53:09,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 08:53:09,447 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 08:53:09,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 08:53:09,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 08:53:09,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 08:53:09,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 08:53:09,448 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 08:53:09,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 08:53:09,448 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 08:53:09,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 08:53:09,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 08:53:09,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 08:53:09,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:53:09,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 08:53:09,448 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 08:53:09,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 08:53:09,449 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 08:53:09,449 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 08:53:09,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 08:53:09,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 08:53:09,449 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 08:53:09,449 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 08:53:09,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 08:53:09,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 08:53:09,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 08:53:09,642 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 08:53:09,642 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 08:53:09,643 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_5.c [2023-04-01 08:53:10,650 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 08:53:10,798 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 08:53:10,798 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_5.c [2023-04-01 08:53:10,802 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/749023e2a/7a541cc99e4047f8a720ffeb5ca7cb6f/FLAG8d3b43ef4 [2023-04-01 08:53:10,817 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/749023e2a/7a541cc99e4047f8a720ffeb5ca7cb6f [2023-04-01 08:53:10,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 08:53:10,820 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 08:53:10,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 08:53:10,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 08:53:10,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 08:53:10,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:53:10" (1/1) ... [2023-04-01 08:53:10,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4171c312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:53:10, skipping insertion in model container [2023-04-01 08:53:10,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:53:10" (1/1) ... [2023-04-01 08:53:10,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 08:53:10,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 08:53:10,931 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-programs/partial_mod_count_5.c[323,336] [2023-04-01 08:53:10,941 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:53:10,947 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 08:53:10,955 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-programs/partial_mod_count_5.c[323,336] [2023-04-01 08:53:10,961 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:53:10,970 INFO L208 MainTranslator]: Completed translation [2023-04-01 08:53:10,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:53:10 WrapperNode [2023-04-01 08:53:10,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 08:53:10,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 08:53:10,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 08:53:10,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 08:53:10,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:53:10" (1/1) ... [2023-04-01 08:53:10,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:53:10" (1/1) ... [2023-04-01 08:53:10,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:53:10" (1/1) ... [2023-04-01 08:53:10,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:53:10" (1/1) ... [2023-04-01 08:53:10,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:53:10" (1/1) ... [2023-04-01 08:53:10,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:53:10" (1/1) ... [2023-04-01 08:53:10,989 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:53:10" (1/1) ... [2023-04-01 08:53:10,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:53:10" (1/1) ... [2023-04-01 08:53:10,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 08:53:10,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 08:53:10,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 08:53:10,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 08:53:10,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:53:10" (1/1) ... [2023-04-01 08:53:10,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:53:11,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:53:11,019 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 08:53:11,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 08:53:11,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 08:53:11,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 08:53:11,044 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 08:53:11,046 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 08:53:11,046 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 08:53:11,046 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 08:53:11,046 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 08:53:11,046 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 08:53:11,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 08:53:11,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 08:53:11,047 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 08:53:11,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 08:53:11,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 08:53:11,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 08:53:11,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 08:53:11,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 08:53:11,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 08:53:11,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 08:53:11,096 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 08:53:11,098 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 08:53:11,188 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 08:53:11,239 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 08:53:11,239 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 08:53:11,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:53:11 BoogieIcfgContainer [2023-04-01 08:53:11,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 08:53:11,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 08:53:11,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 08:53:11,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 08:53:11,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:53:10" (1/3) ... [2023-04-01 08:53:11,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509e1c6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:53:11, skipping insertion in model container [2023-04-01 08:53:11,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:53:10" (2/3) ... [2023-04-01 08:53:11,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509e1c6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:53:11, skipping insertion in model container [2023-04-01 08:53:11,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:53:11" (3/3) ... [2023-04-01 08:53:11,246 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_5.c [2023-04-01 08:53:11,257 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 08:53:11,258 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 08:53:11,297 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 08:53:11,302 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;@64dbc372, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 08:53:11,302 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 08:53:11,337 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 08:53:11,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 08:53:11,355 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:53:11,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:53:11,356 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:53:11,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:53:11,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1627243692, now seen corresponding path program 1 times [2023-04-01 08:53:11,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:53:11,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065018943] [2023-04-01 08:53:11,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:53:11,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:53:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:53:11,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:53:11,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:53:11,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065018943] [2023-04-01 08:53:11,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065018943] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:53:11,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:53:11,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 08:53:11,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511736566] [2023-04-01 08:53:11,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:53:11,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 08:53:11,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:53:11,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 08:53:11,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 08:53:11,714 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:53:11,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:53:11,767 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2023-04-01 08:53:11,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 08:53:11,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 08:53:11,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:53:11,773 INFO L225 Difference]: With dead ends: 34 [2023-04-01 08:53:11,774 INFO L226 Difference]: Without dead ends: 19 [2023-04-01 08:53:11,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 08:53:11,779 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:53:11,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:53:11,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-01 08:53:11,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2023-04-01 08:53:11,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:53:11,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-04-01 08:53:11,806 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2023-04-01 08:53:11,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:53:11,806 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-04-01 08:53:11,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:53:11,806 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-04-01 08:53:11,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 08:53:11,807 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:53:11,807 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:53:11,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 08:53:11,807 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:53:11,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:53:11,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1579459651, now seen corresponding path program 1 times [2023-04-01 08:53:11,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:53:11,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161171630] [2023-04-01 08:53:11,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:53:11,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:53:11,820 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:53:11,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [703372640] [2023-04-01 08:53:11,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:53:11,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:53:11,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:53:11,823 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:53:11,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 08:53:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:53:11,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 08:53:11,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:53:11,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:53:11,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:53:11,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:53:11,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:53:11,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161171630] [2023-04-01 08:53:11,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:53:11,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703372640] [2023-04-01 08:53:11,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703372640] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:53:11,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [943412341] [2023-04-01 08:53:12,031 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 08:53:12,031 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:53:12,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:53:12,037 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:53:12,037 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:53:12,167 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 08:53:12,600 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 81 for LOIs [2023-04-01 08:53:12,642 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:53:12,646 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:53:13,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [943412341] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:53:13,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 08:53:13,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5, 5] total 17 [2023-04-01 08:53:13,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264210207] [2023-04-01 08:53:13,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:53:13,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 08:53:13,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:53:13,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 08:53:13,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-04-01 08:53:13,247 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 11 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:53:14,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:53:14,223 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2023-04-01 08:53:14,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 08:53:14,224 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-01 08:53:14,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:53:14,225 INFO L225 Difference]: With dead ends: 25 [2023-04-01 08:53:14,225 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 08:53:14,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=156, Invalid=440, Unknown=4, NotChecked=0, Total=600 [2023-04-01 08:53:14,227 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:53:14,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 5 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 67 Invalid, 1 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:53:14,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 08:53:14,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-04-01 08:53:14,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 08:53:14,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-04-01 08:53:14,235 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 12 [2023-04-01 08:53:14,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:53:14,235 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-04-01 08:53:14,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:53:14,236 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-04-01 08:53:14,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 08:53:14,236 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:53:14,236 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:53:14,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 08:53:14,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:53:14,442 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:53:14,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:53:14,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1854704851, now seen corresponding path program 1 times [2023-04-01 08:53:14,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:53:14,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515313163] [2023-04-01 08:53:14,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:53:14,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:53:14,468 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:53:14,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989869977] [2023-04-01 08:53:14,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:53:14,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:53:14,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:53:14,481 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:53:14,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 08:53:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:53:14,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 08:53:14,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:53:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 08:53:14,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:53:14,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 08:53:14,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:53:14,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515313163] [2023-04-01 08:53:14,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:53:14,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989869977] [2023-04-01 08:53:14,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989869977] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:53:14,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1170055441] [2023-04-01 08:53:14,584 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 08:53:14,584 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:53:14,585 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:53:14,585 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:53:14,585 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:53:14,628 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 08:53:15,627 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2023-04-01 08:53:15,658 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:53:15,663 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:53:16,303 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '390#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= ~N~0 1000000) (exists ((|v_old(#memory_int)_BEFORE_CALL_12| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_12| (Array Int Int)) (|v_main_~#a~0.base_BEFORE_CALL_12| Int) (|v_old(#length)_BEFORE_CALL_12| (Array Int Int))) (and (= (select |v_old(#length)_BEFORE_CALL_12| 3) 12) (not (= |v_main_~#a~0.base_BEFORE_CALL_12| 2)) (= (select |v_old(#valid)_BEFORE_CALL_12| 3) 1) (not (= |v_main_~#a~0.base_BEFORE_CALL_12| |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_12| (select |v_old(#memory_int)_BEFORE_CALL_12| 1))) (= 22 (select |v_old(#length)_BEFORE_CALL_12| 2)) (= (select |v_old(#valid)_BEFORE_CALL_12| 2) 1) (= (select |v_old(#length)_BEFORE_CALL_12| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_12| |v_main_~#a~0.base_BEFORE_CALL_12|) 0) (not (= |v_main_~#a~0.base_BEFORE_CALL_12| 3)) (not (= |v_old(#valid)_BEFORE_CALL_12| |v_old(#length)_BEFORE_CALL_12|)) (not (= |v_main_~#a~0.base_BEFORE_CALL_12| 0)) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_12| 1) 1)) (not (= |v_old(#length)_BEFORE_CALL_12| (select |v_old(#memory_int)_BEFORE_CALL_12| 1))) (= (select |v_old(#valid)_BEFORE_CALL_12| 1) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_12| 1) 0) 48) (= (select |v_old(#valid)_BEFORE_CALL_12| 0) 0) (not (= |v_main_~#a~0.base_BEFORE_CALL_12| 1)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:53:16,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:53:16,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 08:53:16,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-01 08:53:16,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361999783] [2023-04-01 08:53:16,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 08:53:16,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 08:53:16,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:53:16,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 08:53:16,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=301, Unknown=1, NotChecked=0, Total=380 [2023-04-01 08:53:16,305 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:53:16,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:53:16,376 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2023-04-01 08:53:16,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 08:53:16,377 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19 [2023-04-01 08:53:16,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:53:16,377 INFO L225 Difference]: With dead ends: 48 [2023-04-01 08:53:16,377 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 08:53:16,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=367, Unknown=1, NotChecked=0, Total=462 [2023-04-01 08:53:16,379 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:53:16,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 16 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:53:16,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 08:53:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2023-04-01 08:53:16,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 08:53:16,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-04-01 08:53:16,386 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2023-04-01 08:53:16,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:53:16,386 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-04-01 08:53:16,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:53:16,386 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-04-01 08:53:16,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 08:53:16,387 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:53:16,387 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:53:16,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 08:53:16,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 08:53:16,592 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:53:16,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:53:16,592 INFO L85 PathProgramCache]: Analyzing trace with hash -981913974, now seen corresponding path program 2 times [2023-04-01 08:53:16,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:53:16,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264460786] [2023-04-01 08:53:16,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:53:16,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:53:16,602 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:53:16,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396424370] [2023-04-01 08:53:16,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:53:16,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:53:16,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:53:16,604 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:53:16,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 08:53:16,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 08:53:16,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:53:16,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 08:53:16,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:53:16,769 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:53:16,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 41 [2023-04-01 08:53:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 08:53:16,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:53:17,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:53:17,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264460786] [2023-04-01 08:53:17,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:53:17,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396424370] [2023-04-01 08:53:17,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396424370] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:53:17,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1581255583] [2023-04-01 08:53:17,031 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 08:53:17,031 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:53:17,031 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:53:17,031 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:53:17,031 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:53:17,072 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 08:53:17,906 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 65 for LOIs [2023-04-01 08:53:17,931 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:53:17,934 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:53:18,617 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '619#(and (exists ((|v_old(#memory_int)_BEFORE_CALL_23| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_23| (Array Int Int)) (|v_main_~#a~0.base_BEFORE_CALL_24| Int) (|v_old(#length)_BEFORE_CALL_23| (Array Int Int))) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 1) 0) 48) (not (= |v_main_~#a~0.base_BEFORE_CALL_24| 2)) (= 12 (select |v_old(#length)_BEFORE_CALL_23| 3)) (= (select |v_old(#valid)_BEFORE_CALL_23| 2) 1) (not (= |v_main_~#a~0.base_BEFORE_CALL_24| 1)) (= (select |v_old(#valid)_BEFORE_CALL_23| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_23| |v_main_~#a~0.base_BEFORE_CALL_24|) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_23| 1) |v_old(#length)_BEFORE_CALL_23|)) (not (= |v_old(#valid)_BEFORE_CALL_23| (select |v_old(#memory_int)_BEFORE_CALL_23| 1))) (not (= |v_old(#valid)_BEFORE_CALL_23| |v_old(#length)_BEFORE_CALL_23|)) (not (= |v_main_~#a~0.base_BEFORE_CALL_24| 3)) (= 22 (select |v_old(#length)_BEFORE_CALL_23| 2)) (not (= |v_main_~#a~0.base_BEFORE_CALL_24| |#StackHeapBarrier|)) (not (= |v_main_~#a~0.base_BEFORE_CALL_24| 0)) (= (select |v_old(#valid)_BEFORE_CALL_23| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_23| 3) 1) (= (select |v_old(#length)_BEFORE_CALL_23| 1) 2))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:53:18,618 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:53:18,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 08:53:18,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-04-01 08:53:18,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516304353] [2023-04-01 08:53:18,618 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 08:53:18,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 08:53:18,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:53:18,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 08:53:18,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2023-04-01 08:53:18,622 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:53:18,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:53:18,748 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2023-04-01 08:53:18,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 08:53:18,748 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-04-01 08:53:18,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:53:18,749 INFO L225 Difference]: With dead ends: 36 [2023-04-01 08:53:18,749 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 08:53:18,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2023-04-01 08:53:18,750 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:53:18,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:53:18,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 08:53:18,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2023-04-01 08:53:18,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:53:18,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-04-01 08:53:18,757 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 22 [2023-04-01 08:53:18,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:53:18,758 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-04-01 08:53:18,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:53:18,758 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-04-01 08:53:18,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 08:53:18,758 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:53:18,758 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:53:18,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 08:53:18,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:53:18,962 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:53:18,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:53:18,962 INFO L85 PathProgramCache]: Analyzing trace with hash 308032684, now seen corresponding path program 3 times [2023-04-01 08:53:18,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:53:18,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515213159] [2023-04-01 08:53:18,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:53:18,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:53:18,972 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:53:18,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715266645] [2023-04-01 08:53:18,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:53:18,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:53:18,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:53:18,980 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:53:18,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 08:53:19,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:53:19,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:53:19,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 08:53:19,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:53:19,078 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 08:53:19,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:53:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 08:53:19,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:53:19,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515213159] [2023-04-01 08:53:19,131 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:53:19,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715266645] [2023-04-01 08:53:19,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715266645] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:53:19,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1506857388] [2023-04-01 08:53:19,132 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 08:53:19,132 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:53:19,132 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:53:19,132 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:53:19,132 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:53:19,166 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 08:53:19,935 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 65 for LOIs [2023-04-01 08:53:19,960 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:53:19,963 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:53:20,570 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '927#(and (exists ((|v_old(#memory_int)_BEFORE_CALL_34| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_34| (Array Int Int)) (|v_main_~#a~0.base_BEFORE_CALL_35| Int) (|v_old(#length)_BEFORE_CALL_34| (Array Int Int))) (and (= (select |v_old(#length)_BEFORE_CALL_34| 2) 22) (not (= |v_main_~#a~0.base_BEFORE_CALL_35| 3)) (= 0 (select |v_old(#valid)_BEFORE_CALL_34| |v_main_~#a~0.base_BEFORE_CALL_35|)) (not (= |v_main_~#a~0.base_BEFORE_CALL_35| 1)) (= 2 (select |v_old(#length)_BEFORE_CALL_34| 1)) (= (select |v_old(#valid)_BEFORE_CALL_34| 3) 1) (not (= |v_main_~#a~0.base_BEFORE_CALL_35| 0)) (not (= |v_old(#valid)_BEFORE_CALL_34| (select |v_old(#memory_int)_BEFORE_CALL_34| 1))) (not (= (select |v_old(#memory_int)_BEFORE_CALL_34| 1) |v_old(#length)_BEFORE_CALL_34|)) (not (= |v_old(#valid)_BEFORE_CALL_34| |v_old(#length)_BEFORE_CALL_34|)) (not (= |v_main_~#a~0.base_BEFORE_CALL_35| 2)) (= (select |v_old(#length)_BEFORE_CALL_34| 3) 12) (= (select |v_old(#valid)_BEFORE_CALL_34| 0) 0) (not (= |v_main_~#a~0.base_BEFORE_CALL_35| |#StackHeapBarrier|)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_34| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_34| 2) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_34| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_34| 1) 1))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:53:20,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:53:20,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 08:53:20,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-01 08:53:20,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473789964] [2023-04-01 08:53:20,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 08:53:20,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 08:53:20,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:53:20,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 08:53:20,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2023-04-01 08:53:20,573 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:53:20,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:53:20,786 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2023-04-01 08:53:20,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 08:53:20,786 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-04-01 08:53:20,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:53:20,787 INFO L225 Difference]: With dead ends: 83 [2023-04-01 08:53:20,788 INFO L226 Difference]: Without dead ends: 61 [2023-04-01 08:53:20,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2023-04-01 08:53:20,789 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:53:20,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 35 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:53:20,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-04-01 08:53:20,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2023-04-01 08:53:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:53:20,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2023-04-01 08:53:20,801 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 29 [2023-04-01 08:53:20,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:53:20,801 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2023-04-01 08:53:20,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:53:20,801 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2023-04-01 08:53:20,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 08:53:20,802 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:53:20,802 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:53:20,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 08:53:21,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:53:21,005 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:53:21,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:53:21,005 INFO L85 PathProgramCache]: Analyzing trace with hash 807107916, now seen corresponding path program 4 times [2023-04-01 08:53:21,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:53:21,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370460653] [2023-04-01 08:53:21,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:53:21,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:53:21,017 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:53:21,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715105157] [2023-04-01 08:53:21,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:53:21,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:53:21,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:53:21,021 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:53:21,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 08:53:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:53:21,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 08:53:21,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:53:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 08:53:21,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:53:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 08:53:21,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:53:21,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370460653] [2023-04-01 08:53:21,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:53:21,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715105157] [2023-04-01 08:53:21,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715105157] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:53:21,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [43116954] [2023-04-01 08:53:21,343 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 08:53:21,343 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:53:21,343 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:53:21,343 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:53:21,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:53:21,364 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 08:53:22,073 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 65 for LOIs [2023-04-01 08:53:22,101 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:53:22,103 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:53:22,749 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1375#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((|v_old(#memory_int)_BEFORE_CALL_45| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_45| (Array Int Int)) (|v_main_~#a~0.base_BEFORE_CALL_46| Int) (|v_old(#length)_BEFORE_CALL_45| (Array Int Int))) (and (= (select |v_old(#valid)_BEFORE_CALL_45| 2) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_45| 1) 0) 48) (= (select |v_old(#length)_BEFORE_CALL_45| 3) 12) (not (= |v_old(#valid)_BEFORE_CALL_45| |v_old(#length)_BEFORE_CALL_45|)) (not (= |v_main_~#a~0.base_BEFORE_CALL_46| |#StackHeapBarrier|)) (= (select |v_old(#length)_BEFORE_CALL_45| 2) 22) (not (= |v_main_~#a~0.base_BEFORE_CALL_46| 0)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_45| 1) |v_old(#length)_BEFORE_CALL_45|)) (not (= |v_old(#valid)_BEFORE_CALL_45| (select |v_old(#memory_int)_BEFORE_CALL_45| 1))) (= 2 (select |v_old(#length)_BEFORE_CALL_45| 1)) (not (= |v_main_~#a~0.base_BEFORE_CALL_46| 1)) (= (select |v_old(#valid)_BEFORE_CALL_45| 1) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_45| 1) 1) 0) (not (= |v_main_~#a~0.base_BEFORE_CALL_46| 2)) (= (select |v_old(#valid)_BEFORE_CALL_45| 3) 1) (not (= |v_main_~#a~0.base_BEFORE_CALL_46| 3)) (= (select |v_old(#valid)_BEFORE_CALL_45| |v_main_~#a~0.base_BEFORE_CALL_46|) 0) (= (select |v_old(#valid)_BEFORE_CALL_45| 0) 0))) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:53:22,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:53:22,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 08:53:22,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-04-01 08:53:22,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931532845] [2023-04-01 08:53:22,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 08:53:22,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 08:53:22,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:53:22,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 08:53:22,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 08:53:22,751 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:53:23,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:53:23,230 INFO L93 Difference]: Finished difference Result 131 states and 163 transitions. [2023-04-01 08:53:23,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 08:53:23,231 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-04-01 08:53:23,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:53:23,232 INFO L225 Difference]: With dead ends: 131 [2023-04-01 08:53:23,232 INFO L226 Difference]: Without dead ends: 109 [2023-04-01 08:53:23,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=643, Invalid=1709, Unknown=0, NotChecked=0, Total=2352 [2023-04-01 08:53:23,233 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 180 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 08:53:23,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 34 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 08:53:23,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-04-01 08:53:23,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 50. [2023-04-01 08:53:23,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.05) internal successors, (42), 41 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:53:23,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2023-04-01 08:53:23,250 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 35 [2023-04-01 08:53:23,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:53:23,250 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2023-04-01 08:53:23,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:53:23,250 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2023-04-01 08:53:23,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 08:53:23,251 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:53:23,251 INFO L195 NwaCegarLoop]: trace histogram [22, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:53:23,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 08:53:23,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:53:23,463 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:53:23,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:53:23,463 INFO L85 PathProgramCache]: Analyzing trace with hash -165599604, now seen corresponding path program 5 times [2023-04-01 08:53:23,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:53:23,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196663203] [2023-04-01 08:53:23,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:53:23,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:53:23,480 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:53:23,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074158522] [2023-04-01 08:53:23,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:53:23,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:53:23,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:53:23,481 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:53:23,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 08:53:23,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 08:53:23,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:53:23,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 08:53:23,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:53:23,800 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:53:23,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 41 [2023-04-01 08:53:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2023-04-01 08:53:23,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:53:23,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:53:23,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196663203] [2023-04-01 08:53:23,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:53:23,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074158522] [2023-04-01 08:53:23,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074158522] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:53:23,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1830503081] [2023-04-01 08:53:23,988 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 08:53:23,988 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:53:23,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:53:23,989 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:53:23,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:53:24,010 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 08:53:24,724 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 65 for LOIs [2023-04-01 08:53:24,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:53:24,754 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:53:25,413 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1884#(and (exists ((|v_old(#memory_int)_BEFORE_CALL_56| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_56| (Array Int Int)) (|v_main_~#a~0.base_BEFORE_CALL_59| Int) (|v_old(#length)_BEFORE_CALL_56| (Array Int Int))) (and (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_56| 1) 0)) (not (= |v_main_~#a~0.base_BEFORE_CALL_59| |#StackHeapBarrier|)) (= 2 (select |v_old(#length)_BEFORE_CALL_56| 1)) (= (select |v_old(#valid)_BEFORE_CALL_56| |v_main_~#a~0.base_BEFORE_CALL_59|) 0) (= (select |v_old(#valid)_BEFORE_CALL_56| 1) 1) (not (= |v_main_~#a~0.base_BEFORE_CALL_59| 0)) (not (= |v_old(#valid)_BEFORE_CALL_56| (select |v_old(#memory_int)_BEFORE_CALL_56| 1))) (not (= |v_old(#valid)_BEFORE_CALL_56| |v_old(#length)_BEFORE_CALL_56|)) (not (= |v_main_~#a~0.base_BEFORE_CALL_59| 2)) (= 22 (select |v_old(#length)_BEFORE_CALL_56| 2)) (= (select |v_old(#valid)_BEFORE_CALL_56| 0) 0) (not (= |v_main_~#a~0.base_BEFORE_CALL_59| 3)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_56| 1) 1) 0) (not (= |v_main_~#a~0.base_BEFORE_CALL_59| 1)) (= (select |v_old(#length)_BEFORE_CALL_56| 3) 12) (= (select |v_old(#valid)_BEFORE_CALL_56| 3) 1) (= (select |v_old(#valid)_BEFORE_CALL_56| 2) 1) (not (= |v_old(#length)_BEFORE_CALL_56| (select |v_old(#memory_int)_BEFORE_CALL_56| 1))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:53:25,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:53:25,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 08:53:25,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-04-01 08:53:25,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262157021] [2023-04-01 08:53:25,413 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 08:53:25,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 08:53:25,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:53:25,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 08:53:25,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2023-04-01 08:53:25,415 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 08:53:25,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:53:25,552 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2023-04-01 08:53:25,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 08:53:25,552 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2023-04-01 08:53:25,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:53:25,553 INFO L225 Difference]: With dead ends: 61 [2023-04-01 08:53:25,553 INFO L226 Difference]: Without dead ends: 59 [2023-04-01 08:53:25,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2023-04-01 08:53:25,554 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:53:25,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 39 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:53:25,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-04-01 08:53:25,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2023-04-01 08:53:25,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 46 states have internal predecessors, (47), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 08:53:25,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2023-04-01 08:53:25,569 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 47 [2023-04-01 08:53:25,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:53:25,569 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2023-04-01 08:53:25,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 08:53:25,569 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2023-04-01 08:53:25,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 08:53:25,570 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:53:25,570 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:53:25,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 08:53:25,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:53:25,777 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:53:25,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:53:25,778 INFO L85 PathProgramCache]: Analyzing trace with hash 454006378, now seen corresponding path program 6 times [2023-04-01 08:53:25,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:53:25,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970984096] [2023-04-01 08:53:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:53:25,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:53:25,792 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:53:25,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628867680] [2023-04-01 08:53:25,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:53:25,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:53:25,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:53:25,793 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:53:25,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 08:53:25,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:53:25,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:53:25,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 08:53:25,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:53:26,221 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 08:53:26,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:53:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 6 proven. 253 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-01 08:53:26,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:53:26,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970984096] [2023-04-01 08:53:26,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:53:26,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628867680] [2023-04-01 08:53:26,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628867680] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:53:26,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [278956479] [2023-04-01 08:53:26,650 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 08:53:26,650 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:53:26,650 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:53:26,650 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:53:26,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:53:26,679 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 08:53:27,387 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 65 for LOIs [2023-04-01 08:53:27,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:53:27,415 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:53:28,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2470#(and (exists ((|v_old(#memory_int)_BEFORE_CALL_67| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_67| (Array Int Int)) (|v_main_~#a~0.base_BEFORE_CALL_70| Int) (|v_old(#length)_BEFORE_CALL_67| (Array Int Int))) (and (= (select |v_old(#length)_BEFORE_CALL_67| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_67| 3) 1) (= (select |v_old(#length)_BEFORE_CALL_67| 2) 22) (= (select |v_old(#valid)_BEFORE_CALL_67| 0) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_67| 1) |v_old(#length)_BEFORE_CALL_67|)) (= (select |v_old(#valid)_BEFORE_CALL_67| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_67| 2) 1) (not (= |v_main_~#a~0.base_BEFORE_CALL_70| 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_67| 1) 0) 48) (= (select (select |v_old(#memory_int)_BEFORE_CALL_67| 1) 1) 0) (not (= |v_old(#valid)_BEFORE_CALL_67| |v_old(#length)_BEFORE_CALL_67|)) (not (= |v_main_~#a~0.base_BEFORE_CALL_70| 2)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_67| 1) |v_old(#valid)_BEFORE_CALL_67|)) (= (select |v_old(#length)_BEFORE_CALL_67| 3) 12) (not (= |v_main_~#a~0.base_BEFORE_CALL_70| |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_67| |v_main_~#a~0.base_BEFORE_CALL_70|) 0) (not (= |v_main_~#a~0.base_BEFORE_CALL_70| 0)) (not (= |v_main_~#a~0.base_BEFORE_CALL_70| 3)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:53:28,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:53:28,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 08:53:28,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2023-04-01 08:53:28,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799969125] [2023-04-01 08:53:28,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 08:53:28,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-01 08:53:28,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:53:28,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-01 08:53:28,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1233, Invalid=2549, Unknown=0, NotChecked=0, Total=3782 [2023-04-01 08:53:28,164 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:53:29,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:53:29,397 INFO L93 Difference]: Finished difference Result 238 states and 305 transitions. [2023-04-01 08:53:29,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-01 08:53:29,398 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2023-04-01 08:53:29,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:53:29,400 INFO L225 Difference]: With dead ends: 238 [2023-04-01 08:53:29,400 INFO L226 Difference]: Without dead ends: 209 [2023-04-01 08:53:29,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2045 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2383, Invalid=4757, Unknown=0, NotChecked=0, Total=7140 [2023-04-01 08:53:29,403 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 322 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 08:53:29,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 28 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 08:53:29,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-04-01 08:53:29,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 81. [2023-04-01 08:53:29,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 70 states have internal predecessors, (71), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 08:53:29,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2023-04-01 08:53:29,440 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 54 [2023-04-01 08:53:29,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:53:29,441 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2023-04-01 08:53:29,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:53:29,442 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2023-04-01 08:53:29,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 08:53:29,447 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:53:29,447 INFO L195 NwaCegarLoop]: trace histogram [46, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:53:29,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 08:53:29,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:53:29,657 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:53:29,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:53:29,657 INFO L85 PathProgramCache]: Analyzing trace with hash 595203050, now seen corresponding path program 7 times [2023-04-01 08:53:29,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:53:29,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379582656] [2023-04-01 08:53:29,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:53:29,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:53:29,682 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:53:29,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107426400] [2023-04-01 08:53:29,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:53:29,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:53:29,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:53:29,683 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:53:29,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 08:53:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:53:29,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-01 08:53:29,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:53:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 08:53:30,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:53:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 6 proven. 1081 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-01 08:53:32,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:53:32,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379582656] [2023-04-01 08:53:32,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:53:32,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107426400] [2023-04-01 08:53:32,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107426400] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:53:32,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [9191252] [2023-04-01 08:53:32,351 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 08:53:32,351 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:53:32,351 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:53:32,351 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:53:32,351 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:53:32,372 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 08:53:33,102 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 65 for LOIs [2023-04-01 08:53:33,127 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:53:33,130 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:53:34,043 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3633#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((|v_old(#memory_int)_BEFORE_CALL_78| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_78| (Array Int Int)) (|v_main_~#a~0.base_BEFORE_CALL_81| Int) (|v_old(#length)_BEFORE_CALL_78| (Array Int Int))) (and (not (= |v_main_~#a~0.base_BEFORE_CALL_81| 2)) (= (select |v_old(#valid)_BEFORE_CALL_78| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_78| |v_main_~#a~0.base_BEFORE_CALL_81|) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_78| 1) |v_old(#length)_BEFORE_CALL_78|)) (= (select |v_old(#length)_BEFORE_CALL_78| 3) 12) (not (= |v_main_~#a~0.base_BEFORE_CALL_81| |#StackHeapBarrier|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_78| 1) 1) 0) (= 22 (select |v_old(#length)_BEFORE_CALL_78| 2)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_78| 1) 0)) (not (= |v_old(#valid)_BEFORE_CALL_78| (select |v_old(#memory_int)_BEFORE_CALL_78| 1))) (= (select |v_old(#valid)_BEFORE_CALL_78| 2) 1) (not (= |v_old(#valid)_BEFORE_CALL_78| |v_old(#length)_BEFORE_CALL_78|)) (= (select |v_old(#valid)_BEFORE_CALL_78| 3) 1) (not (= |v_main_~#a~0.base_BEFORE_CALL_81| 0)) (= (select |v_old(#valid)_BEFORE_CALL_78| 0) 0) (not (= |v_main_~#a~0.base_BEFORE_CALL_81| 3)) (= (select |v_old(#length)_BEFORE_CALL_78| 1) 2) (not (= |v_main_~#a~0.base_BEFORE_CALL_81| 1)))) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:53:34,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:53:34,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 08:53:34,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2023-04-01 08:53:34,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967999164] [2023-04-01 08:53:34,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 08:53:34,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-04-01 08:53:34,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:53:34,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-04-01 08:53:34,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4713, Invalid=7277, Unknown=0, NotChecked=0, Total=11990 [2023-04-01 08:53:34,048 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 98 states, 98 states have (on average 1.1020408163265305) internal successors, (108), 98 states have internal predecessors, (108), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:53:38,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:53:38,218 INFO L93 Difference]: Finished difference Result 430 states and 569 transitions. [2023-04-01 08:53:38,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-04-01 08:53:38,219 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1020408163265305) internal successors, (108), 98 states have internal predecessors, (108), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 78 [2023-04-01 08:53:38,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:53:38,221 INFO L225 Difference]: With dead ends: 430 [2023-04-01 08:53:38,221 INFO L226 Difference]: Without dead ends: 401 [2023-04-01 08:53:38,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6413 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=9319, Invalid=15173, Unknown=0, NotChecked=0, Total=24492 [2023-04-01 08:53:38,226 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 796 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 1085 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1085 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 08:53:38,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [843 Valid, 46 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1085 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 08:53:38,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-04-01 08:53:38,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 129. [2023-04-01 08:53:38,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 117 states have (on average 1.017094017094017) internal successors, (119), 118 states have internal predecessors, (119), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 08:53:38,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2023-04-01 08:53:38,273 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 78 [2023-04-01 08:53:38,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:53:38,274 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2023-04-01 08:53:38,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1020408163265305) internal successors, (108), 98 states have internal predecessors, (108), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:53:38,274 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2023-04-01 08:53:38,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-04-01 08:53:38,275 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:53:38,275 INFO L195 NwaCegarLoop]: trace histogram [94, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:53:38,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 08:53:38,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-01 08:53:38,481 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:53:38,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:53:38,481 INFO L85 PathProgramCache]: Analyzing trace with hash 2098040554, now seen corresponding path program 8 times [2023-04-01 08:53:38,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:53:38,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301883910] [2023-04-01 08:53:38,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:53:38,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:53:38,528 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:53:38,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962866479] [2023-04-01 08:53:38,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:53:38,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:53:38,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:53:38,529 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:53:38,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 08:53:38,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 08:53:38,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:53:38,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 08:53:38,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:53:39,321 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:53:39,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 41 [2023-04-01 08:53:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4498 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4477 trivial. 0 not checked. [2023-04-01 08:53:39,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:53:39,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:53:39,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301883910] [2023-04-01 08:53:39,483 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:53:39,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962866479] [2023-04-01 08:53:39,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962866479] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:53:39,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2039592597] [2023-04-01 08:53:39,487 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 08:53:39,487 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:53:39,487 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:53:39,487 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:53:39,487 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:53:39,507 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 08:53:40,222 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 65 for LOIs [2023-04-01 08:53:40,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:53:40,250 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:53:40,912 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5123#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((|v_main_~#a~0.base_BEFORE_CALL_95| Int) (|v_old(#memory_int)_BEFORE_CALL_89| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_89| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_89| (Array Int Int))) (and (not (= |v_old(#valid)_BEFORE_CALL_89| |v_old(#length)_BEFORE_CALL_89|)) (= (select |v_old(#valid)_BEFORE_CALL_89| 0) 0) (not (= |v_main_~#a~0.base_BEFORE_CALL_95| 1)) (= (select |v_old(#valid)_BEFORE_CALL_89| 1) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_89| 1) 0) 48) (= (select |v_old(#valid)_BEFORE_CALL_89| |v_main_~#a~0.base_BEFORE_CALL_95|) 0) (not (= |v_old(#length)_BEFORE_CALL_89| (select |v_old(#memory_int)_BEFORE_CALL_89| 1))) (= (select |v_old(#valid)_BEFORE_CALL_89| 2) 1) (not (= |v_main_~#a~0.base_BEFORE_CALL_95| 3)) (= (select |v_old(#valid)_BEFORE_CALL_89| 3) 1) (= 2 (select |v_old(#length)_BEFORE_CALL_89| 1)) (not (= |v_main_~#a~0.base_BEFORE_CALL_95| 2)) (= (select |v_old(#length)_BEFORE_CALL_89| 2) 22) (= 12 (select |v_old(#length)_BEFORE_CALL_89| 3)) (not (= |v_old(#valid)_BEFORE_CALL_89| (select |v_old(#memory_int)_BEFORE_CALL_89| 1))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_89| 1) 1) 0) (not (= |v_main_~#a~0.base_BEFORE_CALL_95| 0)) (not (= |v_main_~#a~0.base_BEFORE_CALL_95| |#StackHeapBarrier|)))) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:53:40,913 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:53:40,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 08:53:40,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-04-01 08:53:40,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952249500] [2023-04-01 08:53:40,913 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 08:53:40,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 08:53:40,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:53:40,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 08:53:40,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2023-04-01 08:53:40,914 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:53:41,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:53:41,015 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2023-04-01 08:53:41,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 08:53:41,015 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 126 [2023-04-01 08:53:41,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:53:41,016 INFO L225 Difference]: With dead ends: 140 [2023-04-01 08:53:41,016 INFO L226 Difference]: Without dead ends: 138 [2023-04-01 08:53:41,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2023-04-01 08:53:41,017 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:53:41,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 36 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:53:41,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-04-01 08:53:41,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2023-04-01 08:53:41,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 123 states have internal predecessors, (124), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 08:53:41,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2023-04-01 08:53:41,064 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 126 [2023-04-01 08:53:41,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:53:41,064 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2023-04-01 08:53:41,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:53:41,065 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2023-04-01 08:53:41,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-04-01 08:53:41,065 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:53:41,065 INFO L195 NwaCegarLoop]: trace histogram [94, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:53:41,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 08:53:41,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 08:53:41,271 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:53:41,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:53:41,271 INFO L85 PathProgramCache]: Analyzing trace with hash -779311028, now seen corresponding path program 9 times [2023-04-01 08:53:41,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:53:41,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99726857] [2023-04-01 08:53:41,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:53:41,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:53:41,314 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:53:41,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861577223] [2023-04-01 08:53:41,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:53:41,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:53:41,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:53:41,316 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:53:41,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 08:53:41,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:53:41,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:53:41,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 97 conjunts are in the unsatisfiable core [2023-04-01 08:53:41,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:53:44,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4523 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-04-01 08:53:44,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:53:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4523 backedges. 8 proven. 4465 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-04-01 08:53:50,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:53:50,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99726857] [2023-04-01 08:53:50,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:53:50,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861577223] [2023-04-01 08:53:50,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861577223] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:53:50,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1779787725] [2023-04-01 08:53:50,764 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 08:53:50,764 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:53:50,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:53:50,764 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:53:50,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:53:50,792 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 08:53:51,465 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 65 for LOIs [2023-04-01 08:53:51,489 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:53:51,492 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:53:52,785 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6633#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((|v_main_~#a~0.base_BEFORE_CALL_106| Int) (|v_old(#valid)_BEFORE_CALL_100| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_100| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_100| (Array Int (Array Int Int)))) (and (not (= |v_main_~#a~0.base_BEFORE_CALL_106| 2)) (= 2 (select |v_old(#length)_BEFORE_CALL_100| 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_100| 1) 0) 48) (= (select (select |v_old(#memory_int)_BEFORE_CALL_100| 1) 1) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_100| 1) |v_old(#length)_BEFORE_CALL_100|)) (= (select |v_old(#valid)_BEFORE_CALL_100| |v_main_~#a~0.base_BEFORE_CALL_106|) 0) (= (select |v_old(#length)_BEFORE_CALL_100| 2) 22) (not (= |v_old(#valid)_BEFORE_CALL_100| |v_old(#length)_BEFORE_CALL_100|)) (= 1 (select |v_old(#valid)_BEFORE_CALL_100| 1)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_100| 1) |v_old(#valid)_BEFORE_CALL_100|)) (= (select |v_old(#valid)_BEFORE_CALL_100| 0) 0) (not (= |v_main_~#a~0.base_BEFORE_CALL_106| 1)) (= (select |v_old(#valid)_BEFORE_CALL_100| 3) 1) (= 12 (select |v_old(#length)_BEFORE_CALL_100| 3)) (not (= |v_main_~#a~0.base_BEFORE_CALL_106| |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_100| 2) 1) (not (= |v_main_~#a~0.base_BEFORE_CALL_106| 0)) (not (= |v_main_~#a~0.base_BEFORE_CALL_106| 3)))) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:53:52,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:53:52,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 08:53:52,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 194 [2023-04-01 08:53:52,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709401653] [2023-04-01 08:53:52,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 08:53:52,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2023-04-01 08:53:52,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:53:52,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2023-04-01 08:53:52,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18585, Invalid=23645, Unknown=0, NotChecked=0, Total=42230 [2023-04-01 08:53:52,792 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 194 states, 194 states have (on average 1.0515463917525774) internal successors, (204), 194 states have internal predecessors, (204), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:54:12,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:54:12,506 INFO L93 Difference]: Finished difference Result 825 states and 1107 transitions. [2023-04-01 08:54:12,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2023-04-01 08:54:12,506 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 1.0515463917525774) internal successors, (204), 194 states have internal predecessors, (204), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 133 [2023-04-01 08:54:12,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:54:12,509 INFO L225 Difference]: With dead ends: 825 [2023-04-01 08:54:12,509 INFO L226 Difference]: Without dead ends: 789 [2023-04-01 08:54:12,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22061 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=37015, Invalid=53285, Unknown=0, NotChecked=0, Total=90300 [2023-04-01 08:54:12,515 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1741 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 2231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1836 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 3024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2231 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 08:54:12,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1836 Valid, 53 Invalid, 3024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2231 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 08:54:12,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2023-04-01 08:54:12,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 232. [2023-04-01 08:54:12,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 218 states have (on average 1.0091743119266054) internal successors, (220), 219 states have internal predecessors, (220), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 08:54:12,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2023-04-01 08:54:12,609 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 133 [2023-04-01 08:54:12,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:54:12,610 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2023-04-01 08:54:12,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 1.0515463917525774) internal successors, (204), 194 states have internal predecessors, (204), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:54:12,610 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2023-04-01 08:54:12,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-04-01 08:54:12,611 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:54:12,611 INFO L195 NwaCegarLoop]: trace histogram [190, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:54:12,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-04-01 08:54:12,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 08:54:12,819 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:54:12,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:54:12,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1366625716, now seen corresponding path program 10 times [2023-04-01 08:54:12,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:54:12,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246734865] [2023-04-01 08:54:12,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:54:12,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:54:12,901 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:54:12,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166188594] [2023-04-01 08:54:12,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:54:12,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:54:12,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:54:12,902 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:54:12,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 08:54:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:54:13,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 2032 conjuncts, 193 conjunts are in the unsatisfiable core [2023-04-01 08:54:13,463 INFO L285 TraceCheckSpWp]: Computing forward predicates...