/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 OctagonDomain -i ../sv-benchmarks/c/array-multidimensional/max-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:54:32,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:54:32,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:54:32,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 02:54:32,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 02:54:32,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 02:54:32,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 02:54:32,524 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 02:54:32,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 02:54:32,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 02:54:32,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 02:54:32,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 02:54:32,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 02:54:32,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 02:54:32,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 02:54:32,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 02:54:32,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 02:54:32,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 02:54:32,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 02:54:32,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 02:54:32,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 02:54:32,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 02:54:32,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 02:54:32,553 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 02:54:32,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 02:54:32,562 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 02:54:32,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 02:54:32,563 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 02:54:32,563 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 02:54:32,564 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 02:54:32,564 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 02:54:32,565 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 02:54:32,565 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 02:54:32,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:54:32,566 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:54:32,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:54:32,571 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 02:54:32,601 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:54:32,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:54:32,602 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:54:32,602 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:54:32,602 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:54:32,603 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:54:32,603 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:54:32,603 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:54:32,603 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:54:32,603 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:54:32,603 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:54:32,603 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:54:32,604 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:54:32,604 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:54:32,604 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:54:32,604 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:54:32,604 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:54:32,604 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:54:32,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:54:32,609 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:54:32,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:54:32,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:54:32,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:54:32,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:54:32,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:54:32,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:54:32,610 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:54:32,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:54:32,610 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:54:32,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:54:32,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:54:32,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:54:32,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:54:32,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:54:32,611 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:54:32,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:54:32,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:54:32,612 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:54:32,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:54:32,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:54:32,612 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:54:32,613 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:54:32,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:54:32,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:54:32,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:54:32,881 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:54:32,882 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:54:32,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/max-3-n-u.c [2023-04-01 02:54:34,066 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:54:34,238 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:54:34,238 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/max-3-n-u.c [2023-04-01 02:54:34,243 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c112de67/7859aa5329d74aa0b1c4e5d697241fe9/FLAG6a0e9ac7c [2023-04-01 02:54:34,255 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c112de67/7859aa5329d74aa0b1c4e5d697241fe9 [2023-04-01 02:54:34,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:54:34,258 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:54:34,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:54:34,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:54:34,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:54:34,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:54:34" (1/1) ... [2023-04-01 02:54:34,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f2eb02c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:54:34, skipping insertion in model container [2023-04-01 02:54:34,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:54:34" (1/1) ... [2023-04-01 02:54:34,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:54:34,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:54:34,392 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-multidimensional/max-3-n-u.c[321,334] [2023-04-01 02:54:34,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:54:34,416 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:54:34,426 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-multidimensional/max-3-n-u.c[321,334] [2023-04-01 02:54:34,435 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:54:34,445 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:54:34,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:54:34 WrapperNode [2023-04-01 02:54:34,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:54:34,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:54:34,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:54:34,447 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:54:34,457 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:54:34" (1/1) ... [2023-04-01 02:54:34,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:54:34" (1/1) ... [2023-04-01 02:54:34,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:54:34" (1/1) ... [2023-04-01 02:54:34,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:54:34" (1/1) ... [2023-04-01 02:54:34,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:54:34" (1/1) ... [2023-04-01 02:54:34,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:54:34" (1/1) ... [2023-04-01 02:54:34,475 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:54:34" (1/1) ... [2023-04-01 02:54:34,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:54:34" (1/1) ... [2023-04-01 02:54:34,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:54:34,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:54:34,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:54:34,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:54:34,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:54:34" (1/1) ... [2023-04-01 02:54:34,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:54:34,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:54:34,514 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 02:54:34,537 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 02:54:34,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:54:34,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:54:34,553 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:54:34,554 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 02:54:34,554 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:54:34,554 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:54:34,555 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:54:34,555 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:54:34,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:54:34,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 02:54:34,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 02:54:34,556 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:54:34,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 02:54:34,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:54:34,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:54:34,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:54:34,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:54:34,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:54:34,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:54:34,628 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:54:34,630 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:54:34,974 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:54:35,062 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:54:35,062 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-04-01 02:54:35,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:54:35 BoogieIcfgContainer [2023-04-01 02:54:35,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:54:35,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:54:35,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:54:35,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:54:35,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:54:34" (1/3) ... [2023-04-01 02:54:35,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cae6d50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:54:35, skipping insertion in model container [2023-04-01 02:54:35,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:54:34" (2/3) ... [2023-04-01 02:54:35,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cae6d50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:54:35, skipping insertion in model container [2023-04-01 02:54:35,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:54:35" (3/3) ... [2023-04-01 02:54:35,071 INFO L112 eAbstractionObserver]: Analyzing ICFG max-3-n-u.c [2023-04-01 02:54:35,101 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:54:35,101 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:54:35,136 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:54:35,142 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;@22805d70, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:54:35,142 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:54:35,146 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 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 02:54:35,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 02:54:35,152 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:54:35,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:54:35,153 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:54:35,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:54:35,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1068653042, now seen corresponding path program 1 times [2023-04-01 02:54:35,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:54:35,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376422858] [2023-04-01 02:54:35,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:54:35,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:54:35,259 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:54:35,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818050650] [2023-04-01 02:54:35,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:54:35,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:54:35,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:54:35,267 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 02:54:35,268 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 02:54:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:54:35,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:54:35,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:54:35,443 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 02:54:35,444 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 02:54:35,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:54:35,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376422858] [2023-04-01 02:54:35,444 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:54:35,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818050650] [2023-04-01 02:54:35,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818050650] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:54:35,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:54:35,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 02:54:35,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841409428] [2023-04-01 02:54:35,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:54:35,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:54:35,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:54:35,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:54:35,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:54:35,477 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 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 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 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 02:54:35,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:54:35,527 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2023-04-01 02:54:35,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:54:35,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 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 14 [2023-04-01 02:54:35,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:54:35,534 INFO L225 Difference]: With dead ends: 45 [2023-04-01 02:54:35,534 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 02:54:35,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:54:35,540 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:54:35,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 36 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:54:35,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 02:54:35,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-04-01 02:54:35,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 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 02:54:35,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2023-04-01 02:54:35,571 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 14 [2023-04-01 02:54:35,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:54:35,571 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2023-04-01 02:54:35,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 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 02:54:35,572 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2023-04-01 02:54:35,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 02:54:35,573 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:54:35,573 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:54:35,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 02:54:35,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 02:54:35,777 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:54:35,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:54:35,778 INFO L85 PathProgramCache]: Analyzing trace with hash -877775016, now seen corresponding path program 1 times [2023-04-01 02:54:35,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:54:35,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486375356] [2023-04-01 02:54:35,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:54:35,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:54:35,791 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:54:35,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17537210] [2023-04-01 02:54:35,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:54:35,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:54:35,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:54:35,793 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 02:54:35,812 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 02:54:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:54:35,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:54:35,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:54:35,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:54:35,910 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 02:54:35,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:54:35,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486375356] [2023-04-01 02:54:35,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:54:35,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17537210] [2023-04-01 02:54:35,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17537210] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:54:35,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:54:35,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 02:54:35,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196650988] [2023-04-01 02:54:35,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:54:35,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 02:54:35,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:54:35,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 02:54:35,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:54:35,915 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 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 02:54:35,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:54:35,997 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2023-04-01 02:54:35,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 02:54:35,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 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 16 [2023-04-01 02:54:35,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:54:36,000 INFO L225 Difference]: With dead ends: 50 [2023-04-01 02:54:36,000 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 02:54:36,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 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 02:54:36,002 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:54:36,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 34 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:54:36,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 02:54:36,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2023-04-01 02:54:36,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 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 02:54:36,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2023-04-01 02:54:36,014 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 16 [2023-04-01 02:54:36,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:54:36,015 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2023-04-01 02:54:36,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 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 02:54:36,015 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2023-04-01 02:54:36,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 02:54:36,015 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:54:36,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:54:36,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 02:54:36,223 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,SelfDestructingSolverStorable1 [2023-04-01 02:54:36,223 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:54:36,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:54:36,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1407079577, now seen corresponding path program 1 times [2023-04-01 02:54:36,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:54:36,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091261033] [2023-04-01 02:54:36,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:54:36,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:54:36,238 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:54:36,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311500399] [2023-04-01 02:54:36,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:54:36,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:54:36,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:54:36,243 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 02:54:36,246 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 02:54:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:54:36,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:54:36,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:54:36,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:54:36,339 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 02:54:36,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:54:36,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091261033] [2023-04-01 02:54:36,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:54:36,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311500399] [2023-04-01 02:54:36,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311500399] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:54:36,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:54:36,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 02:54:36,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817490190] [2023-04-01 02:54:36,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:54:36,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 02:54:36,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:54:36,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 02:54:36,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:54:36,344 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 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 02:54:36,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:54:36,409 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2023-04-01 02:54:36,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 02:54:36,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 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 18 [2023-04-01 02:54:36,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:54:36,411 INFO L225 Difference]: With dead ends: 53 [2023-04-01 02:54:36,411 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 02:54:36,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 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 02:54:36,414 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:54:36,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 35 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:54:36,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 02:54:36,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2023-04-01 02:54:36,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 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 02:54:36,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2023-04-01 02:54:36,433 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 18 [2023-04-01 02:54:36,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:54:36,435 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2023-04-01 02:54:36,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 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 02:54:36,435 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2023-04-01 02:54:36,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 02:54:36,436 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:54:36,436 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:54:36,441 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 02:54:36,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:54:36,638 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:54:36,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:54:36,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1007823888, now seen corresponding path program 1 times [2023-04-01 02:54:36,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:54:36,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677688483] [2023-04-01 02:54:36,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:54:36,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:54:36,661 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:54:36,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621368043] [2023-04-01 02:54:36,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:54:36,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:54:36,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:54:36,663 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 02:54:36,665 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 02:54:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:54:36,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:54:36,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:54:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:54:36,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:54:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:54:36,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:54:36,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677688483] [2023-04-01 02:54:36,773 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:54:36,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621368043] [2023-04-01 02:54:36,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621368043] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:54:36,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [769915989] [2023-04-01 02:54:36,788 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 02:54:36,789 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:54:36,791 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:54:36,795 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:54:36,795 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:54:36,880 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:54:37,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:54:37,554 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:54:37,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [769915989] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:54:37,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:54:37,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5, 5] total 17 [2023-04-01 02:54:37,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224556732] [2023-04-01 02:54:37,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:54:37,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 02:54:37,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:54:37,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 02:54:37,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-04-01 02:54:37,708 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 11 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 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 02:54:38,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:54:38,505 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2023-04-01 02:54:38,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 02:54:38,506 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 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 19 [2023-04-01 02:54:38,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:54:38,507 INFO L225 Difference]: With dead ends: 49 [2023-04-01 02:54:38,507 INFO L226 Difference]: Without dead ends: 35 [2023-04-01 02:54:38,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2023-04-01 02:54:38,514 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 71 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:54:38,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 11 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:54:38,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-01 02:54:38,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2023-04-01 02:54:38,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 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 02:54:38,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2023-04-01 02:54:38,531 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 19 [2023-04-01 02:54:38,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:54:38,532 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2023-04-01 02:54:38,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 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 02:54:38,532 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2023-04-01 02:54:38,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 02:54:38,533 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:54:38,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:54:38,538 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 02:54:38,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:54:38,739 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:54:38,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:54:38,739 INFO L85 PathProgramCache]: Analyzing trace with hash -804693800, now seen corresponding path program 1 times [2023-04-01 02:54:38,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:54:38,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389627229] [2023-04-01 02:54:38,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:54:38,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:54:38,752 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:54:38,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261005892] [2023-04-01 02:54:38,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:54:38,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:54:38,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:54:38,753 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 02:54:38,765 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 02:54:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:54:38,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:54:38,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:54:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 02:54:38,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:54:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 02:54:38,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:54:38,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389627229] [2023-04-01 02:54:38,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:54:38,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261005892] [2023-04-01 02:54:38,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261005892] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:54:38,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [547457511] [2023-04-01 02:54:38,881 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:54:38,881 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:54:38,882 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:54:38,882 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:54:38,882 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:54:38,904 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:54:39,463 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-01 02:54:39,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:54:39,477 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:54:39,776 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1001#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 02:54:39,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:54:39,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:54:39,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-01 02:54:39,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376057037] [2023-04-01 02:54:39,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:54:39,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 02:54:39,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:54:39,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 02:54:39,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2023-04-01 02:54:39,778 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 2 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 02:54:39,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:54:39,902 INFO L93 Difference]: Finished difference Result 70 states and 98 transitions. [2023-04-01 02:54:39,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 02:54:39,903 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 2 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 24 [2023-04-01 02:54:39,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:54:39,904 INFO L225 Difference]: With dead ends: 70 [2023-04-01 02:54:39,904 INFO L226 Difference]: Without dead ends: 46 [2023-04-01 02:54:39,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2023-04-01 02:54:39,905 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 78 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:54:39,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 35 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:54:39,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-04-01 02:54:39,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2023-04-01 02:54:39,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 02:54:39,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2023-04-01 02:54:39,919 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 24 [2023-04-01 02:54:39,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:54:39,919 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2023-04-01 02:54:39,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 2 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 02:54:39,919 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2023-04-01 02:54:39,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 02:54:39,920 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:54:39,920 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:54:39,929 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 02:54:40,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:54:40,129 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:54:40,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:54:40,130 INFO L85 PathProgramCache]: Analyzing trace with hash -688329268, now seen corresponding path program 2 times [2023-04-01 02:54:40,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:54:40,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010865299] [2023-04-01 02:54:40,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:54:40,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:54:40,142 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:54:40,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082507460] [2023-04-01 02:54:40,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:54:40,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:54:40,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:54:40,144 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 02:54:40,146 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 02:54:40,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 02:54:40,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:54:40,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:54:40,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:54:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-01 02:54:40,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:54:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-01 02:54:40,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:54:40,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010865299] [2023-04-01 02:54:40,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:54:40,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082507460] [2023-04-01 02:54:40,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082507460] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:54:40,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1602159353] [2023-04-01 02:54:40,288 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:54:40,288 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:54:40,288 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:54:40,288 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:54:40,288 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:54:40,306 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:54:40,730 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-01 02:54:40,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:54:40,736 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:54:41,016 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1411#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 02:54:41,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:54:41,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:54:41,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-01 02:54:41,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041712896] [2023-04-01 02:54:41,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:54:41,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 02:54:41,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:54:41,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 02:54:41,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2023-04-01 02:54:41,019 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 2 states have call successors, (3), 2 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 02:54:41,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:54:41,164 INFO L93 Difference]: Finished difference Result 173 states and 228 transitions. [2023-04-01 02:54:41,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 02:54:41,164 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 2 states have call successors, (3), 2 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 30 [2023-04-01 02:54:41,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:54:41,167 INFO L225 Difference]: With dead ends: 173 [2023-04-01 02:54:41,167 INFO L226 Difference]: Without dead ends: 142 [2023-04-01 02:54:41,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2023-04-01 02:54:41,169 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 124 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:54:41,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 54 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:54:41,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-04-01 02:54:41,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 93. [2023-04-01 02:54:41,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 84 states have (on average 1.25) internal successors, (105), 84 states have internal predecessors, (105), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 02:54:41,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2023-04-01 02:54:41,212 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 30 [2023-04-01 02:54:41,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:54:41,212 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 116 transitions. [2023-04-01 02:54:41,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 2 states have call successors, (3), 2 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 02:54:41,212 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions. [2023-04-01 02:54:41,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 02:54:41,215 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:54:41,215 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:54:41,223 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 02:54:41,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:54:41,421 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:54:41,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:54:41,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1954994938, now seen corresponding path program 3 times [2023-04-01 02:54:41,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:54:41,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125807307] [2023-04-01 02:54:41,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:54:41,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:54:41,441 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:54:41,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8629315] [2023-04-01 02:54:41,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:54:41,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:54:41,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:54:41,443 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 02:54:41,445 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 02:54:41,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:54:41,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:54:41,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-01 02:54:41,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:55:17,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 02:55:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 36 proven. 78 refuted. 27 times theorem prover too weak. 315 trivial. 0 not checked. [2023-04-01 02:55:17,848 INFO L327 TraceCheckSpWp]: Computing backward predicates...