/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/array-programs/partial_mod_count_limited_5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 20:48:20,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 20:48:20,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 20:48:20,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 20:48:20,405 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 20:48:20,407 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 20:48:20,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 20:48:20,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 20:48:20,414 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 20:48:20,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 20:48:20,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 20:48:20,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 20:48:20,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 20:48:20,424 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 20:48:20,426 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 20:48:20,427 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 20:48:20,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 20:48:20,428 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 20:48:20,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 20:48:20,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 20:48:20,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 20:48:20,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 20:48:20,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 20:48:20,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 20:48:20,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 20:48:20,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 20:48:20,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 20:48:20,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 20:48:20,452 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 20:48:20,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 20:48:20,453 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 20:48:20,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 20:48:20,453 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 20:48:20,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 20:48:20,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 20:48:20,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 20:48:20,456 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 20:48:20,487 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 20:48:20,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 20:48:20,488 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 20:48:20,488 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 20:48:20,489 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 20:48:20,489 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 20:48:20,489 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 20:48:20,489 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 20:48:20,489 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 20:48:20,489 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 20:48:20,490 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 20:48:20,490 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 20:48:20,490 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 20:48:20,490 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 20:48:20,491 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 20:48:20,491 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 20:48:20,491 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 20:48:20,491 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 20:48:20,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 20:48:20,492 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 20:48:20,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 20:48:20,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 20:48:20,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 20:48:20,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 20:48:20,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 20:48:20,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 20:48:20,493 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 20:48:20,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 20:48:20,493 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 20:48:20,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 20:48:20,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 20:48:20,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 20:48:20,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:48:20,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 20:48:20,494 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 20:48:20,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 20:48:20,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 20:48:20,494 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 20:48:20,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 20:48:20,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 20:48:20,495 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 20:48:20,495 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 20:48:20,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 20:48:20,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 20:48:20,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 20:48:20,753 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 20:48:20,754 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 20:48:20,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_limited_5.c [2023-03-31 20:48:21,885 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 20:48:22,054 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 20:48:22,055 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_5.c [2023-03-31 20:48:22,060 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2d643e9b/ecf0eed0e24a42a686defc86e936b63a/FLAGe24ad1810 [2023-03-31 20:48:22,074 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2d643e9b/ecf0eed0e24a42a686defc86e936b63a [2023-03-31 20:48:22,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 20:48:22,078 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 20:48:22,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 20:48:22,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 20:48:22,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 20:48:22,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:48:22" (1/1) ... [2023-03-31 20:48:22,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1864be10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:48:22, skipping insertion in model container [2023-03-31 20:48:22,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:48:22" (1/1) ... [2023-03-31 20:48:22,092 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 20:48:22,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 20:48:22,212 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_5.c[331,344] [2023-03-31 20:48:22,233 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:48:22,240 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 20:48:22,248 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_5.c[331,344] [2023-03-31 20:48:22,261 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:48:22,272 INFO L208 MainTranslator]: Completed translation [2023-03-31 20:48:22,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:48:22 WrapperNode [2023-03-31 20:48:22,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 20:48:22,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 20:48:22,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 20:48:22,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 20:48:22,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:48:22" (1/1) ... [2023-03-31 20:48:22,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:48:22" (1/1) ... [2023-03-31 20:48:22,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:48:22" (1/1) ... [2023-03-31 20:48:22,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:48:22" (1/1) ... [2023-03-31 20:48:22,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:48:22" (1/1) ... [2023-03-31 20:48:22,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:48:22" (1/1) ... [2023-03-31 20:48:22,306 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:48:22" (1/1) ... [2023-03-31 20:48:22,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:48:22" (1/1) ... [2023-03-31 20:48:22,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 20:48:22,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 20:48:22,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 20:48:22,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 20:48:22,311 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:48:22" (1/1) ... [2023-03-31 20:48:22,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:48:22,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:48:22,342 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 20:48:22,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 20:48:22,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 20:48:22,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 20:48:22,379 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 20:48:22,380 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 20:48:22,380 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 20:48:22,380 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 20:48:22,380 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 20:48:22,380 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 20:48:22,381 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 20:48:22,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 20:48:22,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 20:48:22,381 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 20:48:22,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 20:48:22,381 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 20:48:22,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 20:48:22,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 20:48:22,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 20:48:22,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 20:48:22,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 20:48:22,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 20:48:22,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 20:48:22,466 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 20:48:22,468 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 20:48:22,608 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 20:48:22,700 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 20:48:22,700 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 20:48:22,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:48:22 BoogieIcfgContainer [2023-03-31 20:48:22,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 20:48:22,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 20:48:22,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 20:48:22,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 20:48:22,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 08:48:22" (1/3) ... [2023-03-31 20:48:22,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e01000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:48:22, skipping insertion in model container [2023-03-31 20:48:22,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:48:22" (2/3) ... [2023-03-31 20:48:22,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e01000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:48:22, skipping insertion in model container [2023-03-31 20:48:22,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:48:22" (3/3) ... [2023-03-31 20:48:22,712 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_5.c [2023-03-31 20:48:22,732 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 20:48:22,732 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 20:48:22,772 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 20:48:22,778 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;@4c609735, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 20:48:22,778 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 20:48:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:48:22,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-03-31 20:48:22,788 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:48:22,789 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:48:22,789 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:48:22,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:48:22,793 INFO L85 PathProgramCache]: Analyzing trace with hash 745588606, now seen corresponding path program 1 times [2023-03-31 20:48:22,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:48:22,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627736981] [2023-03-31 20:48:22,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:48:22,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:48:22,874 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:48:22,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231658973] [2023-03-31 20:48:22,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:48:22,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:22,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:48:22,879 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:48:22,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 20:48:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:48:22,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 20:48:22,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:48:23,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:48:23,124 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:48:23,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:48:23,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627736981] [2023-03-31 20:48:23,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:48:23,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231658973] [2023-03-31 20:48:23,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231658973] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:48:23,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:48:23,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 20:48:23,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8305670] [2023-03-31 20:48:23,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:48:23,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 20:48:23,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:48:23,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 20:48:23,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 20:48:23,170 INFO L87 Difference]: Start difference. First operand has 22 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:48:23,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:48:23,260 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2023-03-31 20:48:23,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 20:48:23,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-03-31 20:48:23,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:48:23,268 INFO L225 Difference]: With dead ends: 38 [2023-03-31 20:48:23,268 INFO L226 Difference]: Without dead ends: 23 [2023-03-31 20:48:23,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 20:48:23,273 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:48:23,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 21 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:48:23,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-03-31 20:48:23,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2023-03-31 20:48:23,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:48:23,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-03-31 20:48:23,303 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2023-03-31 20:48:23,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:48:23,303 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-03-31 20:48:23,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:48:23,304 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-03-31 20:48:23,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-03-31 20:48:23,304 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:48:23,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:48:23,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 20:48:23,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-03-31 20:48:23,511 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:48:23,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:48:23,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1499595414, now seen corresponding path program 1 times [2023-03-31 20:48:23,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:48:23,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117772475] [2023-03-31 20:48:23,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:48:23,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:48:23,544 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:48:23,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075238623] [2023-03-31 20:48:23,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:48:23,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:23,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:48:23,546 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:48:23,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 20:48:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:48:23,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 20:48:23,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:48:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:48:23,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:48:23,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:48:23,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:48:23,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117772475] [2023-03-31 20:48:23,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:48:23,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075238623] [2023-03-31 20:48:23,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075238623] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:48:23,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [95377785] [2023-03-31 20:48:23,793 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-03-31 20:48:23,794 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:48:23,796 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:48:23,800 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:48:23,801 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:48:23,902 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:48:24,267 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 69 for LOIs [2023-03-31 20:48:24,355 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-03-31 20:48:24,368 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:48:24,374 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:48:25,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [95377785] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:48:25,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:48:25,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [5, 5] total 21 [2023-03-31 20:48:25,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332150533] [2023-03-31 20:48:25,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:48:25,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-31 20:48:25,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:48:25,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-31 20:48:25,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-03-31 20:48:25,170 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 15 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:48:29,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:48:29,168 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2023-03-31 20:48:29,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-03-31 20:48:29,168 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-03-31 20:48:29,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:48:29,171 INFO L225 Difference]: With dead ends: 46 [2023-03-31 20:48:29,171 INFO L226 Difference]: Without dead ends: 44 [2023-03-31 20:48:29,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2023-03-31 20:48:29,173 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 88 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-31 20:48:29,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 6 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-31 20:48:29,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-03-31 20:48:29,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 26. [2023-03-31 20:48:29,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:48:29,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-03-31 20:48:29,184 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 16 [2023-03-31 20:48:29,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:48:29,184 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-03-31 20:48:29,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:48:29,185 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-03-31 20:48:29,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 20:48:29,185 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:48:29,185 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:48:29,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 20:48:29,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-03-31 20:48:29,391 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:48:29,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:48:29,392 INFO L85 PathProgramCache]: Analyzing trace with hash -2095682240, now seen corresponding path program 1 times [2023-03-31 20:48:29,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:48:29,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529853850] [2023-03-31 20:48:29,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:48:29,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:48:29,404 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:48:29,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509547628] [2023-03-31 20:48:29,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:48:29,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:29,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:48:29,405 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:48:29,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 20:48:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:48:29,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 20:48:29,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:48:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 20:48:29,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:48:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 20:48:29,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:48:29,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529853850] [2023-03-31 20:48:29,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:48:29,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509547628] [2023-03-31 20:48:29,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509547628] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:48:29,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1092705611] [2023-03-31 20:48:29,533 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:48:29,534 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:48:29,534 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:48:29,534 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:48:29,534 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:48:29,579 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:48:29,837 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-03-31 20:48:29,976 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-03-31 20:48:29,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:48:30,001 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:48:33,649 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '560#(and (<= 0 ~N~0) (exists ((v_main_~R~0_BEFORE_CALL_13 Int) (v_main_~j~0_BEFORE_CALL_13 Int)) (<= (mod (div (mod ~N~0 4294967296) (* (mod v_main_~R~0_BEFORE_CALL_13 2147483648) 2)) 4294967296) (mod v_main_~j~0_BEFORE_CALL_13 4294967296))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 20:48:33,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:48:33,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:48:33,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-03-31 20:48:33,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339727877] [2023-03-31 20:48:33,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:48:33,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 20:48:33,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:48:33,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 20:48:33,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-03-31 20:48:33,652 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 20:48:33,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:48:33,959 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2023-03-31 20:48:33,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 20:48:33,960 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 23 [2023-03-31 20:48:33,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:48:33,960 INFO L225 Difference]: With dead ends: 52 [2023-03-31 20:48:33,960 INFO L226 Difference]: Without dead ends: 37 [2023-03-31 20:48:33,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-03-31 20:48:33,963 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 20:48:33,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 26 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 20:48:33,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-03-31 20:48:33,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2023-03-31 20:48:33,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:48:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-03-31 20:48:33,975 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 23 [2023-03-31 20:48:33,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:48:33,975 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-03-31 20:48:33,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 20:48:33,975 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-03-31 20:48:33,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 20:48:33,976 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:48:33,976 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:48:33,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 20:48:34,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:34,178 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:48:34,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:48:34,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1823173036, now seen corresponding path program 2 times [2023-03-31 20:48:34,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:48:34,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130622227] [2023-03-31 20:48:34,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:48:34,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:48:34,225 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:48:34,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564692280] [2023-03-31 20:48:34,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:48:34,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:34,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:48:34,249 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:48:34,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 20:48:34,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 20:48:34,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:48:34,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2023-03-31 20:48:34,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:48:34,611 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 20:48:34,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 62 [2023-03-31 20:48:34,716 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 20:48:34,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:48:36,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:48:36,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130622227] [2023-03-31 20:48:36,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:48:36,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564692280] [2023-03-31 20:48:36,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564692280] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:48:36,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1615871195] [2023-03-31 20:48:36,075 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:48:36,075 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:48:36,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:48:36,076 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:48:36,076 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:48:36,095 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:48:36,316 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-03-31 20:48:36,450 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-03-31 20:48:36,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:48:36,461 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:48:42,160 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '816#(and (<= 0 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 20:48:42,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:48:42,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 20:48:42,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-03-31 20:48:42,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828202260] [2023-03-31 20:48:42,161 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 20:48:42,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 20:48:42,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:48:42,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 20:48:42,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=749, Unknown=2, NotChecked=0, Total=870 [2023-03-31 20:48:42,162 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:48:43,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:48:43,719 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2023-03-31 20:48:43,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 20:48:43,720 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2023-03-31 20:48:43,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:48:43,721 INFO L225 Difference]: With dead ends: 40 [2023-03-31 20:48:43,721 INFO L226 Difference]: Without dead ends: 38 [2023-03-31 20:48:43,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=147, Invalid=907, Unknown=2, NotChecked=0, Total=1056 [2023-03-31 20:48:43,722 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-03-31 20:48:43,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 41 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 2 Unknown, 0 Unchecked, 1.5s Time] [2023-03-31 20:48:43,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-03-31 20:48:43,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2023-03-31 20:48:43,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:48:43,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2023-03-31 20:48:43,734 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 26 [2023-03-31 20:48:43,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:48:43,735 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2023-03-31 20:48:43,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:48:43,735 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2023-03-31 20:48:43,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-03-31 20:48:43,736 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:48:43,736 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:48:43,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 20:48:43,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:43,937 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:48:43,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:48:43,937 INFO L85 PathProgramCache]: Analyzing trace with hash 191173310, now seen corresponding path program 3 times [2023-03-31 20:48:43,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:48:43,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855744358] [2023-03-31 20:48:43,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:48:43,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:48:43,957 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:48:43,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157220378] [2023-03-31 20:48:43,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:48:43,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:43,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:48:43,959 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:48:43,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 20:48:44,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:48:44,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:48:44,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 20:48:44,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:48:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 20:48:44,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:48:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-31 20:48:44,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:48:44,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855744358] [2023-03-31 20:48:44,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:48:44,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157220378] [2023-03-31 20:48:44,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157220378] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:48:44,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [735593448] [2023-03-31 20:48:44,159 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:48:44,159 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:48:44,159 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:48:44,160 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:48:44,160 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:48:44,178 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:48:44,404 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-03-31 20:48:44,528 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-03-31 20:48:44,534 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:48:44,536 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:48:49,945 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1163#(and (<= 0 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 20:48:49,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:48:49,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:48:49,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-03-31 20:48:49,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709998963] [2023-03-31 20:48:49,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:48:49,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 20:48:49,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:48:49,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 20:48:49,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2023-03-31 20:48:49,948 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 20:48:50,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:48:50,698 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2023-03-31 20:48:50,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 20:48:50,698 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 33 [2023-03-31 20:48:50,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:48:50,699 INFO L225 Difference]: With dead ends: 87 [2023-03-31 20:48:50,699 INFO L226 Difference]: Without dead ends: 65 [2023-03-31 20:48:50,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2023-03-31 20:48:50,700 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 85 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 20:48:50,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 31 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 20:48:50,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-03-31 20:48:50,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 42. [2023-03-31 20:48:50,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:48:50,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2023-03-31 20:48:50,716 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 33 [2023-03-31 20:48:50,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:48:50,716 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2023-03-31 20:48:50,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 20:48:50,717 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2023-03-31 20:48:50,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-03-31 20:48:50,717 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:48:50,718 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:48:50,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 20:48:50,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:50,923 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:48:50,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:48:50,923 INFO L85 PathProgramCache]: Analyzing trace with hash -547353794, now seen corresponding path program 4 times [2023-03-31 20:48:50,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:48:50,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250841967] [2023-03-31 20:48:50,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:48:50,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:48:50,939 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:48:50,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979596481] [2023-03-31 20:48:50,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:48:50,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:50,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:48:50,948 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:48:50,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 20:48:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:48:51,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 13 conjunts are in the unsatisfiable core [2023-03-31 20:48:51,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:48:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 20:48:51,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:48:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-31 20:48:51,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:48:51,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250841967] [2023-03-31 20:48:51,304 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:48:51,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979596481] [2023-03-31 20:48:51,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979596481] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:48:51,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [112665246] [2023-03-31 20:48:51,306 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:48:51,306 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:48:51,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:48:51,307 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:48:51,307 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:48:51,326 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:48:51,496 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-03-31 20:48:51,508 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-03-31 20:48:51,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:48:51,515 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:48:56,994 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1650#(and (<= 0 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 20:48:56,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:48:56,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:48:56,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-03-31 20:48:56,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228301008] [2023-03-31 20:48:56,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:48:56,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-03-31 20:48:56,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:48:56,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-03-31 20:48:56,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1275, Unknown=1, NotChecked=0, Total=1640 [2023-03-31 20:48:56,997 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 20:48:58,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:48:58,316 INFO L93 Difference]: Finished difference Result 135 states and 167 transitions. [2023-03-31 20:48:58,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-03-31 20:48:58,316 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 39 [2023-03-31 20:48:58,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:48:58,317 INFO L225 Difference]: With dead ends: 135 [2023-03-31 20:48:58,317 INFO L226 Difference]: Without dead ends: 113 [2023-03-31 20:48:58,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=650, Invalid=2001, Unknown=1, NotChecked=0, Total=2652 [2023-03-31 20:48:58,320 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 150 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:48:58,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 37 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-31 20:48:58,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-03-31 20:48:58,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 54. [2023-03-31 20:48:58,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 43 states have internal predecessors, (44), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:48:58,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2023-03-31 20:48:58,339 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 39 [2023-03-31 20:48:58,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:48:58,339 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2023-03-31 20:48:58,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 20:48:58,339 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2023-03-31 20:48:58,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-03-31 20:48:58,340 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:48:58,340 INFO L195 NwaCegarLoop]: trace histogram [22, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:48:58,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 20:48:58,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:58,542 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:48:58,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:48:58,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1456939970, now seen corresponding path program 5 times [2023-03-31 20:48:58,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:48:58,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268361262] [2023-03-31 20:48:58,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:48:58,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:48:58,565 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:48:58,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150253709] [2023-03-31 20:48:58,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:48:58,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:58,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:48:58,569 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:48:58,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 20:48:58,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 20:48:58,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:48:58,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 26 conjunts are in the unsatisfiable core [2023-03-31 20:48:58,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:48:59,250 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 20:48:59,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 94 [2023-03-31 20:48:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2023-03-31 20:48:59,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:49:00,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:00,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268361262] [2023-03-31 20:49:00,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:49:00,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150253709] [2023-03-31 20:49:00,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150253709] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:49:00,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [289771718] [2023-03-31 20:49:00,434 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:49:00,434 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:49:00,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:49:00,435 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:49:00,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:49:00,447 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:49:00,665 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-03-31 20:49:00,774 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-03-31 20:49:00,781 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:49:00,784 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:49:10,689 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2188#(and (<= 0 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~j~0_BEFORE_CALL_60 Int) (v_main_~R~0_BEFORE_CALL_60 Int)) (<= (mod (div (mod ~N~0 4294967296) (* (mod v_main_~R~0_BEFORE_CALL_60 2147483648) 2)) 4294967296) (mod v_main_~j~0_BEFORE_CALL_60 4294967296))))' at error location [2023-03-31 20:49:10,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:49:10,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 20:49:10,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-03-31 20:49:10,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033196039] [2023-03-31 20:49:10,690 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 20:49:10,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 20:49:10,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:49:10,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 20:49:10,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=853, Unknown=2, NotChecked=0, Total=992 [2023-03-31 20:49:10,691 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:49:16,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-03-31 20:49:19,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-03-31 20:49:19,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:49:19,589 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2023-03-31 20:49:19,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 20:49:19,590 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 51 [2023-03-31 20:49:19,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:49:19,591 INFO L225 Difference]: With dead ends: 65 [2023-03-31 20:49:19,591 INFO L226 Difference]: Without dead ends: 63 [2023-03-31 20:49:19,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=175, Invalid=1082, Unknown=3, NotChecked=0, Total=1260 [2023-03-31 20:49:19,592 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 6 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-03-31 20:49:19,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 46 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 123 Invalid, 6 Unknown, 0 Unchecked, 6.7s Time] [2023-03-31 20:49:19,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-03-31 20:49:19,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2023-03-31 20:49:19,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 48 states have internal predecessors, (49), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 20:49:19,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2023-03-31 20:49:19,611 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 51 [2023-03-31 20:49:19,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:49:19,611 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2023-03-31 20:49:19,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:49:19,612 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2023-03-31 20:49:19,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-03-31 20:49:19,612 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:19,612 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:49:19,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 20:49:19,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:19,820 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:19,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:19,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1129383956, now seen corresponding path program 6 times [2023-03-31 20:49:19,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:19,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364391017] [2023-03-31 20:49:19,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:19,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:19,841 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:49:19,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709768463] [2023-03-31 20:49:19,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:49:19,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:19,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:19,842 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:49:19,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 20:49:19,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:49:19,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:49:19,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 25 conjunts are in the unsatisfiable core [2023-03-31 20:49:19,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:49:20,308 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-03-31 20:49:20,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:49:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 6 proven. 253 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-03-31 20:49:20,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:20,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364391017] [2023-03-31 20:49:20,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:49:20,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709768463] [2023-03-31 20:49:20,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709768463] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:49:20,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1080588814] [2023-03-31 20:49:20,794 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:49:20,794 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:49:20,795 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:49:20,795 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:49:20,795 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:49:20,810 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:49:20,973 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-03-31 20:49:21,074 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-03-31 20:49:21,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:49:21,083 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:49:24,373 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2815#(and (<= 0 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 20:49:24,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:49:24,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:49:24,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2023-03-31 20:49:24,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100310220] [2023-03-31 20:49:24,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:49:24,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-03-31 20:49:24,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:49:24,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-03-31 20:49:24,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1241, Invalid=2919, Unknown=0, NotChecked=0, Total=4160 [2023-03-31 20:49:24,376 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 50 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 20:49:27,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:49:27,352 INFO L93 Difference]: Finished difference Result 242 states and 309 transitions. [2023-03-31 20:49:27,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-03-31 20:49:27,353 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 58 [2023-03-31 20:49:27,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:49:27,355 INFO L225 Difference]: With dead ends: 242 [2023-03-31 20:49:27,355 INFO L226 Difference]: Without dead ends: 213 [2023-03-31 20:49:27,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2541 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2391, Invalid=5265, Unknown=0, NotChecked=0, Total=7656 [2023-03-31 20:49:27,358 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 385 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:49:27,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 36 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-03-31 20:49:27,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-03-31 20:49:27,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 85. [2023-03-31 20:49:27,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 71 states have (on average 1.028169014084507) internal successors, (73), 72 states have internal predecessors, (73), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 20:49:27,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2023-03-31 20:49:27,409 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 58 [2023-03-31 20:49:27,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:49:27,409 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2023-03-31 20:49:27,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 20:49:27,410 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2023-03-31 20:49:27,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-03-31 20:49:27,411 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:27,411 INFO L195 NwaCegarLoop]: trace histogram [46, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:49:27,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-31 20:49:27,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-03-31 20:49:27,618 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:27,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:27,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1330091500, now seen corresponding path program 7 times [2023-03-31 20:49:27,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:27,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761208252] [2023-03-31 20:49:27,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:27,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:27,652 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:49:27,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055932119] [2023-03-31 20:49:27,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:49:27,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:27,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:27,654 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:49:27,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 20:49:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:27,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 49 conjunts are in the unsatisfiable core [2023-03-31 20:49:27,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:49:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-03-31 20:49:28,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:49:30,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 6 proven. 1081 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-03-31 20:49:30,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:30,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761208252] [2023-03-31 20:49:30,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:49:30,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055932119] [2023-03-31 20:49:30,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055932119] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:49:30,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [734747107] [2023-03-31 20:49:30,640 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:49:30,640 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:49:30,640 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:49:30,640 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:49:30,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:49:30,674 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:49:30,815 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-03-31 20:49:30,825 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-03-31 20:49:30,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:49:30,841 INFO L180 IcfgInterpreter]: Interpretation finished