/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-cav19/array_init_pair_sum_const.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 15:15:11,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 15:15:11,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 15:15:11,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 15:15:11,310 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 15:15:11,313 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 15:15:11,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 15:15:11,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 15:15:11,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 15:15:11,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 15:15:11,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 15:15:11,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 15:15:11,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 15:15:11,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 15:15:11,326 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 15:15:11,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 15:15:11,328 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 15:15:11,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 15:15:11,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 15:15:11,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 15:15:11,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 15:15:11,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 15:15:11,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 15:15:11,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 15:15:11,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 15:15:11,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 15:15:11,340 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 15:15:11,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 15:15:11,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 15:15:11,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 15:15:11,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 15:15:11,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 15:15:11,343 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 15:15:11,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 15:15:11,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 15:15:11,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 15:15:11,350 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 [2023-04-02 15:15:11,386 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 15:15:11,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 15:15:11,387 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 15:15:11,387 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 15:15:11,388 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 15:15:11,388 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 15:15:11,388 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 15:15:11,389 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 15:15:11,389 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 15:15:11,389 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 15:15:11,390 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 15:15:11,390 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 15:15:11,390 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 15:15:11,390 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 15:15:11,390 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 15:15:11,390 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 15:15:11,391 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 15:15:11,391 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 15:15:11,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 15:15:11,392 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 15:15:11,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 15:15:11,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 15:15:11,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 15:15:11,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 15:15:11,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 15:15:11,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 15:15:11,393 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 15:15:11,393 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 15:15:11,393 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 15:15:11,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 15:15:11,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 15:15:11,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 15:15:11,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:15:11,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 15:15:11,394 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 15:15:11,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 15:15:11,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 15:15:11,395 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 15:15:11,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 15:15:11,395 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 15:15:11,395 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 15:15:11,395 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 15:15:11,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 15:15:11,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 15:15:11,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 15:15:11,657 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 15:15:11,657 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 15:15:11,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c [2023-04-02 15:15:12,892 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 15:15:13,079 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 15:15:13,080 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c [2023-04-02 15:15:13,084 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9c80872b/57c696bff1774989af464e0e8764cbad/FLAG9575661eb [2023-04-02 15:15:13,096 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9c80872b/57c696bff1774989af464e0e8764cbad [2023-04-02 15:15:13,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 15:15:13,099 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 15:15:13,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 15:15:13,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 15:15:13,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 15:15:13,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:15:13" (1/1) ... [2023-04-02 15:15:13,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b145c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:15:13, skipping insertion in model container [2023-04-02 15:15:13,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:15:13" (1/1) ... [2023-04-02 15:15:13,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 15:15:13,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 15:15:13,251 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-cav19/array_init_pair_sum_const.c[416,429] [2023-04-02 15:15:13,265 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:15:13,275 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 15:15:13,287 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-cav19/array_init_pair_sum_const.c[416,429] [2023-04-02 15:15:13,294 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:15:13,310 INFO L208 MainTranslator]: Completed translation [2023-04-02 15:15:13,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:15:13 WrapperNode [2023-04-02 15:15:13,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 15:15:13,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 15:15:13,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 15:15:13,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 15:15:13,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:15:13" (1/1) ... [2023-04-02 15:15:13,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:15:13" (1/1) ... [2023-04-02 15:15:13,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:15:13" (1/1) ... [2023-04-02 15:15:13,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:15:13" (1/1) ... [2023-04-02 15:15:13,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:15:13" (1/1) ... [2023-04-02 15:15:13,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:15:13" (1/1) ... [2023-04-02 15:15:13,350 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:15:13" (1/1) ... [2023-04-02 15:15:13,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:15:13" (1/1) ... [2023-04-02 15:15:13,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 15:15:13,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 15:15:13,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 15:15:13,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 15:15:13,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:15:13" (1/1) ... [2023-04-02 15:15:13,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:15:13,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:15:13,387 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) [2023-04-02 15:15:13,407 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 [2023-04-02 15:15:13,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 15:15:13,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 15:15:13,425 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 15:15:13,426 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 15:15:13,427 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 15:15:13,427 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 15:15:13,427 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 15:15:13,427 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 15:15:13,427 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 15:15:13,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 15:15:13,427 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 15:15:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 15:15:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 15:15:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 15:15:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 15:15:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 15:15:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 15:15:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 15:15:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 15:15:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 15:15:13,500 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 15:15:13,502 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 15:15:13,705 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 15:15:13,731 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 15:15:13,731 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-02 15:15:13,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:15:13 BoogieIcfgContainer [2023-04-02 15:15:13,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 15:15:13,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 15:15:13,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 15:15:13,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 15:15:13,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 03:15:13" (1/3) ... [2023-04-02 15:15:13,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a1859e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:15:13, skipping insertion in model container [2023-04-02 15:15:13,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:15:13" (2/3) ... [2023-04-02 15:15:13,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a1859e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:15:13, skipping insertion in model container [2023-04-02 15:15:13,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:15:13" (3/3) ... [2023-04-02 15:15:13,740 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_pair_sum_const.c [2023-04-02 15:15:13,754 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 15:15:13,754 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 15:15:13,798 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 15:15:13,806 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;@67756de9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 15:15:13,806 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 15:15:13,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2023-04-02 15:15:13,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 15:15:13,821 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:15:13,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:15:13,822 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:15:13,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:15:13,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1372240758, now seen corresponding path program 1 times [2023-04-02 15:15:13,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:15:13,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674796748] [2023-04-02 15:15:13,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:15:13,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:15:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:15:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:15:14,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:15:14,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674796748] [2023-04-02 15:15:14,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674796748] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:15:14,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:15:14,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 15:15:14,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034063242] [2023-04-02 15:15:14,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:15:14,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 15:15:14,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:15:14,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 15:15:14,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:15:14,226 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-04-02 15:15:14,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:15:14,277 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2023-04-02 15:15:14,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 15:15:14,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2023-04-02 15:15:14,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:15:14,284 INFO L225 Difference]: With dead ends: 33 [2023-04-02 15:15:14,284 INFO L226 Difference]: Without dead ends: 17 [2023-04-02 15:15:14,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:15:14,291 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:15:14,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:15:14,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-04-02 15:15:14,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-04-02 15:15:14,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2023-04-02 15:15:14,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-04-02 15:15:14,321 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2023-04-02 15:15:14,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:15:14,322 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-04-02 15:15:14,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-04-02 15:15:14,322 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-04-02 15:15:14,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-02 15:15:14,323 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:15:14,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:15:14,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 15:15:14,324 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:15:14,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:15:14,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1147049993, now seen corresponding path program 1 times [2023-04-02 15:15:14,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:15:14,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591851927] [2023-04-02 15:15:14,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:15:14,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:15:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:15:14,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 15:15:14,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:15:14,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591851927] [2023-04-02 15:15:14,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591851927] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:15:14,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:15:14,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 15:15:14,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988179546] [2023-04-02 15:15:14,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:15:14,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 15:15:14,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:15:14,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 15:15:14,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 15:15:14,431 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2023-04-02 15:15:14,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:15:14,469 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2023-04-02 15:15:14,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 15:15:14,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 13 [2023-04-02 15:15:14,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:15:14,471 INFO L225 Difference]: With dead ends: 27 [2023-04-02 15:15:14,471 INFO L226 Difference]: Without dead ends: 18 [2023-04-02 15:15:14,472 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 [2023-04-02 15:15:14,473 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:15:14,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 20 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:15:14,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-04-02 15:15:14,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-04-02 15:15:14,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2023-04-02 15:15:14,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-04-02 15:15:14,478 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2023-04-02 15:15:14,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:15:14,479 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-04-02 15:15:14,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2023-04-02 15:15:14,479 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-04-02 15:15:14,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 15:15:14,480 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:15:14,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:15:14,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 15:15:14,480 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:15:14,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:15:14,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1469831347, now seen corresponding path program 1 times [2023-04-02 15:15:14,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:15:14,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112942641] [2023-04-02 15:15:14,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:15:14,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:15:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:15:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 15:15:14,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:15:14,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112942641] [2023-04-02 15:15:14,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112942641] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:15:14,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847747964] [2023-04-02 15:15:14,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:15:14,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:15:14,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:15:14,589 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) [2023-04-02 15:15:14,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 15:15:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:15:14,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 15:15:14,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:15:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 15:15:14,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:15:14,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 15:15:14,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847747964] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:15:14,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1383489503] [2023-04-02 15:15:14,792 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 15:15:14,793 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:15:14,795 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:15:14,823 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:15:14,823 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:15:14,962 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 15:15:15,373 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-02 15:15:15,402 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:15:15,410 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:15:15,848 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '262#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#c~0.base_BEFORE_CALL_1| Int)) (and (< (select (select |#memory_int| |v_main_~#c~0.base_BEFORE_CALL_1|) 4) 3) (<= (+ |#StackHeapBarrier| 1) |v_main_~#c~0.base_BEFORE_CALL_1|) (<= 2 |v_main_~#c~0.base_BEFORE_CALL_1|) (<= 3 (+ |v_main_~#c~0.base_BEFORE_CALL_1| |#StackHeapBarrier|)))) (= |#NULL.base| 0))' at error location [2023-04-02 15:15:15,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:15:15,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:15:15,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-04-02 15:15:15,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013321553] [2023-04-02 15:15:15,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:15:15,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 15:15:15,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:15:15,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 15:15:15,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-04-02 15:15:15,851 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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) [2023-04-02 15:15:15,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:15:15,894 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2023-04-02 15:15:15,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 15:15:15,894 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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 [2023-04-02 15:15:15,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:15:15,895 INFO L225 Difference]: With dead ends: 32 [2023-04-02 15:15:15,895 INFO L226 Difference]: Without dead ends: 21 [2023-04-02 15:15:15,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-04-02 15:15:15,899 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:15:15,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 39 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:15:15,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-02 15:15:15,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-02 15:15:15,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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) [2023-04-02 15:15:15,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-04-02 15:15:15,909 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 14 [2023-04-02 15:15:15,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:15:15,910 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-04-02 15:15:15,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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) [2023-04-02 15:15:15,910 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-04-02 15:15:15,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 15:15:15,912 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:15:15,912 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:15:15,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 15:15:16,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:15:16,118 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:15:16,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:15:16,119 INFO L85 PathProgramCache]: Analyzing trace with hash 543032128, now seen corresponding path program 2 times [2023-04-02 15:15:16,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:15:16,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82064607] [2023-04-02 15:15:16,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:15:16,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:15:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:15:16,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 15:15:16,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:15:16,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82064607] [2023-04-02 15:15:16,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82064607] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:15:16,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77398357] [2023-04-02 15:15:16,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:15:16,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:15:16,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:15:16,304 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) [2023-04-02 15:15:16,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 15:15:16,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 15:15:16,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:15:16,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 15:15:16,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:15:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 15:15:16,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:15:16,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 15:15:16,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77398357] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:15:16,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [7807630] [2023-04-02 15:15:16,500 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 15:15:16,500 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:15:16,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:15:16,501 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:15:16,501 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:15:16,542 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 15:15:16,688 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-02 15:15:16,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:15:16,710 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:15:17,081 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '470#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#c~0.base_BEFORE_CALL_2| Int)) (and (<= 3 (+ |v_main_~#c~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (< (select (select |#memory_int| |v_main_~#c~0.base_BEFORE_CALL_2|) 4) 3) (<= (+ |#StackHeapBarrier| 1) |v_main_~#c~0.base_BEFORE_CALL_2|) (<= 2 |v_main_~#c~0.base_BEFORE_CALL_2|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 15:15:17,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:15:17,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:15:17,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2023-04-02 15:15:17,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530610559] [2023-04-02 15:15:17,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:15:17,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 15:15:17,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:15:17,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 15:15:17,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2023-04-02 15:15:17,084 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 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) [2023-04-02 15:15:17,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:15:17,241 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2023-04-02 15:15:17,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 15:15:17,246 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 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 17 [2023-04-02 15:15:17,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:15:17,249 INFO L225 Difference]: With dead ends: 57 [2023-04-02 15:15:17,249 INFO L226 Difference]: Without dead ends: 46 [2023-04-02 15:15:17,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2023-04-02 15:15:17,252 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:15:17,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 56 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:15:17,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-04-02 15:15:17,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 30. [2023-04-02 15:15:17,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 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) [2023-04-02 15:15:17,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-04-02 15:15:17,270 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2023-04-02 15:15:17,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:15:17,271 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-04-02 15:15:17,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 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) [2023-04-02 15:15:17,271 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-04-02 15:15:17,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-02 15:15:17,272 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:15:17,272 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:15:17,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 15:15:17,478 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,SelfDestructingSolverStorable3 [2023-04-02 15:15:17,478 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:15:17,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:15:17,478 INFO L85 PathProgramCache]: Analyzing trace with hash -2142260461, now seen corresponding path program 3 times [2023-04-02 15:15:17,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:15:17,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970056277] [2023-04-02 15:15:17,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:15:17,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:15:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:15:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 15:15:17,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:15:17,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970056277] [2023-04-02 15:15:17,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970056277] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:15:17,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314207120] [2023-04-02 15:15:17,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 15:15:17,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:15:17,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:15:17,709 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) [2023-04-02 15:15:17,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 15:15:18,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 15:15:18,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:15:18,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-02 15:15:18,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:15:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 15:15:18,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:15:18,380 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 15:15:18,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314207120] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:15:18,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [235240480] [2023-04-02 15:15:18,382 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 15:15:18,382 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:15:18,382 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:15:18,382 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:15:18,383 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:15:18,399 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 15:15:18,542 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-02 15:15:18,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:15:18,563 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:15:18,929 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '818#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#c~0.base_BEFORE_CALL_3| Int)) (and (< (select (select |#memory_int| |v_main_~#c~0.base_BEFORE_CALL_3|) 4) 3) (<= 3 (+ |v_main_~#c~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#c~0.base_BEFORE_CALL_3|) (<= 2 |v_main_~#c~0.base_BEFORE_CALL_3|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 15:15:18,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:15:18,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:15:18,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-04-02 15:15:18,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687041001] [2023-04-02 15:15:18,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:15:18,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-02 15:15:18,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:15:18,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-02 15:15:18,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 15:15:18,932 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 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) [2023-04-02 15:15:18,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:15:18,970 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2023-04-02 15:15:18,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-02 15:15:18,971 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 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 26 [2023-04-02 15:15:18,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:15:18,971 INFO L225 Difference]: With dead ends: 56 [2023-04-02 15:15:18,971 INFO L226 Difference]: Without dead ends: 39 [2023-04-02 15:15:18,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 15:15:18,972 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:15:18,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:15:18,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-02 15:15:18,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-04-02 15:15:18,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 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) [2023-04-02 15:15:18,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2023-04-02 15:15:18,978 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 26 [2023-04-02 15:15:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:15:18,978 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2023-04-02 15:15:18,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 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) [2023-04-02 15:15:18,979 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2023-04-02 15:15:18,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-02 15:15:18,979 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:15:18,979 INFO L195 NwaCegarLoop]: trace histogram [16, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:15:18,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 15:15:19,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:15:19,188 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:15:19,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:15:19,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1322468032, now seen corresponding path program 4 times [2023-04-02 15:15:19,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:15:19,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14261301] [2023-04-02 15:15:19,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:15:19,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:15:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:15:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 15:15:19,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:15:19,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14261301] [2023-04-02 15:15:19,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14261301] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:15:19,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519959030] [2023-04-02 15:15:19,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 15:15:19,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:15:19,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:15:19,701 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) [2023-04-02 15:15:19,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 15:15:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:15:19,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 15:15:19,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:15:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 15:15:20,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:15:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 15:15:20,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519959030] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:15:20,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [597024380] [2023-04-02 15:15:20,483 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 15:15:20,483 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:15:20,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:15:20,483 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:15:20,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:15:20,500 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 15:15:20,641 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-02 15:15:20,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:15:20,660 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:15:21,046 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1258#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#c~0.base_BEFORE_CALL_4| Int)) (and (< (select (select |#memory_int| |v_main_~#c~0.base_BEFORE_CALL_4|) 4) 3) (<= (+ |#StackHeapBarrier| 1) |v_main_~#c~0.base_BEFORE_CALL_4|) (<= 3 (+ |v_main_~#c~0.base_BEFORE_CALL_4| |#StackHeapBarrier|)) (<= 2 |v_main_~#c~0.base_BEFORE_CALL_4|))) (= |#NULL.base| 0))' at error location [2023-04-02 15:15:21,046 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:15:21,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:15:21,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 53 [2023-04-02 15:15:21,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945582966] [2023-04-02 15:15:21,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:15:21,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-04-02 15:15:21,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:15:21,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-04-02 15:15:21,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1390, Invalid=2516, Unknown=0, NotChecked=0, Total=3906 [2023-04-02 15:15:21,055 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 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) [2023-04-02 15:15:21,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:15:21,131 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2023-04-02 15:15:21,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-04-02 15:15:21,133 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 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 35 [2023-04-02 15:15:21,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:15:21,135 INFO L225 Difference]: With dead ends: 74 [2023-04-02 15:15:21,135 INFO L226 Difference]: Without dead ends: 57 [2023-04-02 15:15:21,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1971 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1390, Invalid=2516, Unknown=0, NotChecked=0, Total=3906 [2023-04-02 15:15:21,137 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:15:21,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:15:21,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-02 15:15:21,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-04-02 15:15:21,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 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) [2023-04-02 15:15:21,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2023-04-02 15:15:21,149 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 35 [2023-04-02 15:15:21,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:15:21,150 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2023-04-02 15:15:21,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 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) [2023-04-02 15:15:21,150 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2023-04-02 15:15:21,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-02 15:15:21,153 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:15:21,153 INFO L195 NwaCegarLoop]: trace histogram [34, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:15:21,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 15:15:21,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:15:21,362 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:15:21,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:15:21,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1520799392, now seen corresponding path program 5 times [2023-04-02 15:15:21,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:15:21,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527239791] [2023-04-02 15:15:21,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:15:21,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:15:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:15:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 15:15:22,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:15:22,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527239791] [2023-04-02 15:15:22,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527239791] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:15:22,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841159503] [2023-04-02 15:15:22,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:15:22,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:15:22,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:15:22,675 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) [2023-04-02 15:15:22,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 15:15:22,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-02 15:15:22,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:15:22,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-02 15:15:22,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:15:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2023-04-02 15:15:23,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:15:23,472 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2023-04-02 15:15:23,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841159503] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:15:23,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1319506846] [2023-04-02 15:15:23,475 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 15:15:23,475 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:15:23,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:15:23,475 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:15:23,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:15:23,491 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 15:15:23,609 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-02 15:15:23,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:15:23,621 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:15:24,042 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1880#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#c~0.base_BEFORE_CALL_5| Int)) (and (<= 3 (+ |v_main_~#c~0.base_BEFORE_CALL_5| |#StackHeapBarrier|)) (<= 2 |v_main_~#c~0.base_BEFORE_CALL_5|) (< (select (select |#memory_int| |v_main_~#c~0.base_BEFORE_CALL_5|) 4) 3) (<= (+ |#StackHeapBarrier| 1) |v_main_~#c~0.base_BEFORE_CALL_5|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 15:15:24,042 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:15:24,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:15:24,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 11, 11] total 55 [2023-04-02 15:15:24,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527165807] [2023-04-02 15:15:24,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:15:24,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-04-02 15:15:24,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:15:24,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-04-02 15:15:24,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1518, Invalid=2642, Unknown=0, NotChecked=0, Total=4160 [2023-04-02 15:15:24,046 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 55 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 55 states have internal predecessors, (65), 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) [2023-04-02 15:15:25,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:15:25,637 INFO L93 Difference]: Finished difference Result 243 states and 332 transitions. [2023-04-02 15:15:25,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-04-02 15:15:25,638 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 55 states have internal predecessors, (65), 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 53 [2023-04-02 15:15:25,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:15:25,639 INFO L225 Difference]: With dead ends: 243 [2023-04-02 15:15:25,639 INFO L226 Difference]: Without dead ends: 226 [2023-04-02 15:15:25,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2684 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3268, Invalid=6632, Unknown=0, NotChecked=0, Total=9900 [2023-04-02 15:15:25,643 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 422 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 15:15:25,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 38 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 15:15:25,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-04-02 15:15:25,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 102. [2023-04-02 15:15:25,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 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) [2023-04-02 15:15:25,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2023-04-02 15:15:25,665 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 53 [2023-04-02 15:15:25,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:15:25,666 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2023-04-02 15:15:25,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 55 states have internal predecessors, (65), 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) [2023-04-02 15:15:25,666 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2023-04-02 15:15:25,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-02 15:15:25,667 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:15:25,667 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:15:25,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 15:15:25,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:15:25,869 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:15:25,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:15:25,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1279960749, now seen corresponding path program 6 times [2023-04-02 15:15:25,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:15:25,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990075745] [2023-04-02 15:15:25,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:15:25,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:15:25,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:15:27,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-04-02 15:15:27,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:15:27,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990075745] [2023-04-02 15:15:27,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990075745] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:15:27,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193020644] [2023-04-02 15:15:27,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 15:15:27,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:15:27,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:15:27,929 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) [2023-04-02 15:15:27,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process