/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_4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 20:47:53,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 20:47:53,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 20:47:53,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 20:47:53,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 20:47:53,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 20:47:53,360 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 20:47:53,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 20:47:53,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 20:47:53,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 20:47:53,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 20:47:53,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 20:47:53,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 20:47:53,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 20:47:53,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 20:47:53,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 20:47:53,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 20:47:53,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 20:47:53,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 20:47:53,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 20:47:53,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 20:47:53,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 20:47:53,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 20:47:53,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 20:47:53,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 20:47:53,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 20:47:53,401 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 20:47:53,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 20:47:53,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 20:47:53,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 20:47:53,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 20:47:53,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 20:47:53,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 20:47:53,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 20:47:53,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 20:47:53,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 20:47:53,407 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 20:47:53,442 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 20:47:53,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 20:47:53,443 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 20:47:53,443 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 20:47:53,443 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 20:47:53,444 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 20:47:53,444 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 20:47:53,444 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 20:47:53,444 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 20:47:53,444 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 20:47:53,445 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 20:47:53,445 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 20:47:53,445 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 20:47:53,445 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 20:47:53,445 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 20:47:53,445 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 20:47:53,445 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 20:47:53,446 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 20:47:53,446 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 20:47:53,446 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 20:47:53,446 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 20:47:53,446 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 20:47:53,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 20:47:53,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 20:47:53,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 20:47:53,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 20:47:53,447 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 20:47:53,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 20:47:53,447 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 20:47:53,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 20:47:53,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 20:47:53,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 20:47:53,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:47:53,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 20:47:53,448 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 20:47:53,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 20:47:53,449 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 20:47:53,449 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 20:47:53,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 20:47:53,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 20:47:53,449 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 20:47:53,449 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 20:47:53,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 20:47:53,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 20:47:53,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 20:47:53,695 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 20:47:53,695 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 20:47:53,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_4.c [2023-03-31 20:47:54,834 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 20:47:55,042 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 20:47:55,043 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_4.c [2023-03-31 20:47:55,047 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d0769a4e/ff7985908cb14f9e830c7c651a660f2a/FLAG598a65846 [2023-03-31 20:47:55,061 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d0769a4e/ff7985908cb14f9e830c7c651a660f2a [2023-03-31 20:47:55,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 20:47:55,065 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 20:47:55,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 20:47:55,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 20:47:55,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 20:47:55,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:47:55" (1/1) ... [2023-03-31 20:47:55,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24e0dc63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:47:55, skipping insertion in model container [2023-03-31 20:47:55,073 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:47:55" (1/1) ... [2023-03-31 20:47:55,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 20:47:55,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 20:47:55,230 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_4.c[323,336] [2023-03-31 20:47:55,247 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:47:55,257 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 20:47:55,269 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_4.c[323,336] [2023-03-31 20:47:55,284 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:47:55,297 INFO L208 MainTranslator]: Completed translation [2023-03-31 20:47:55,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:47:55 WrapperNode [2023-03-31 20:47:55,298 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 20:47:55,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 20:47:55,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 20:47:55,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 20:47:55,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:47:55" (1/1) ... [2023-03-31 20:47:55,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:47:55" (1/1) ... [2023-03-31 20:47:55,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:47:55" (1/1) ... [2023-03-31 20:47:55,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:47:55" (1/1) ... [2023-03-31 20:47:55,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:47:55" (1/1) ... [2023-03-31 20:47:55,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:47:55" (1/1) ... [2023-03-31 20:47:55,341 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:47:55" (1/1) ... [2023-03-31 20:47:55,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:47:55" (1/1) ... [2023-03-31 20:47:55,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 20:47:55,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 20:47:55,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 20:47:55,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 20:47:55,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:47:55" (1/1) ... [2023-03-31 20:47:55,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:47:55,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:47:55,378 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 20:47:55,404 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 20:47:55,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 20:47:55,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 20:47:55,419 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 20:47:55,419 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 20:47:55,420 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 20:47:55,420 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 20:47:55,420 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 20:47:55,420 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 20:47:55,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 20:47:55,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 20:47:55,420 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 20:47:55,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 20:47:55,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 20:47:55,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 20:47:55,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 20:47:55,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 20:47:55,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 20:47:55,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 20:47:55,491 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 20:47:55,492 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 20:47:55,684 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 20:47:55,748 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 20:47:55,748 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 20:47:55,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:47:55 BoogieIcfgContainer [2023-03-31 20:47:55,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 20:47:55,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 20:47:55,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 20:47:55,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 20:47:55,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 08:47:55" (1/3) ... [2023-03-31 20:47:55,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57301336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:47:55, skipping insertion in model container [2023-03-31 20:47:55,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:47:55" (2/3) ... [2023-03-31 20:47:55,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57301336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:47:55, skipping insertion in model container [2023-03-31 20:47:55,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:47:55" (3/3) ... [2023-03-31 20:47:55,757 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_4.c [2023-03-31 20:47:55,786 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 20:47:55,786 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 20:47:55,847 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 20:47:55,852 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;@1799f0eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 20:47:55,853 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 20:47:55,857 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:47:55,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 20:47:55,865 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:47:55,865 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:47:55,866 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:47:55,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:47:55,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1627243692, now seen corresponding path program 1 times [2023-03-31 20:47:55,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:47:55,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442708284] [2023-03-31 20:47:55,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:47:55,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:47:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:47:56,220 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 20:47:56,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:47:56,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442708284] [2023-03-31 20:47:56,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442708284] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:47:56,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:47:56,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 20:47:56,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414646759] [2023-03-31 20:47:56,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:47:56,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 20:47:56,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:47:56,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 20:47:56,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 20:47:56,258 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:47:56,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:47:56,340 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2023-03-31 20:47:56,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 20:47:56,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 20:47:56,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:47:56,349 INFO L225 Difference]: With dead ends: 34 [2023-03-31 20:47:56,349 INFO L226 Difference]: Without dead ends: 19 [2023-03-31 20:47:56,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 20:47:56,357 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:47:56,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:47:56,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-03-31 20:47:56,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2023-03-31 20:47:56,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:47:56,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-03-31 20:47:56,388 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2023-03-31 20:47:56,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:47:56,389 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-03-31 20:47:56,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:47:56,390 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-03-31 20:47:56,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-03-31 20:47:56,391 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:47:56,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:47:56,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 20:47:56,392 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:47:56,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:47:56,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1579459651, now seen corresponding path program 1 times [2023-03-31 20:47:56,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:47:56,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921782177] [2023-03-31 20:47:56,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:47:56,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:47:56,426 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:47:56,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119211938] [2023-03-31 20:47:56,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:47:56,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:47:56,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:47:56,430 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 20:47:56,431 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 20:47:56,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:47:56,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 20:47:56,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:47:56,588 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 20:47:56,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:47:56,650 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 20:47:56,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:47:56,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921782177] [2023-03-31 20:47:56,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:47:56,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119211938] [2023-03-31 20:47:56,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119211938] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:47:56,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [549403782] [2023-03-31 20:47:56,666 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-03-31 20:47:56,666 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:47:56,669 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:47:56,674 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:47:56,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:47:56,825 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:47:56,924 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-03-31 20:47:56,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:47:56,954 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:47:57,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [549403782] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:47:57,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:47:57,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5, 5] total 17 [2023-03-31 20:47:57,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231511490] [2023-03-31 20:47:57,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:47:57,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 20:47:57,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:47:57,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 20:47:57,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-03-31 20:47:57,204 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 11 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:47:57,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:47:57,797 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2023-03-31 20:47:57,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 20:47:57,797 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-03-31 20:47:57,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:47:57,798 INFO L225 Difference]: With dead ends: 25 [2023-03-31 20:47:57,798 INFO L226 Difference]: Without dead ends: 23 [2023-03-31 20:47:57,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2023-03-31 20:47:57,801 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 39 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:47:57,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 4 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:47:57,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-03-31 20:47:57,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-03-31 20:47:57,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:47:57,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-03-31 20:47:57,809 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 12 [2023-03-31 20:47:57,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:47:57,809 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-03-31 20:47:57,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:47:57,810 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-03-31 20:47:57,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-03-31 20:47:57,810 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:47:57,810 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:47:57,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 20:47:58,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:47:58,017 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:47:58,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:47:58,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1854704851, now seen corresponding path program 1 times [2023-03-31 20:47:58,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:47:58,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895728995] [2023-03-31 20:47:58,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:47:58,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:47:58,041 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:47:58,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001372091] [2023-03-31 20:47:58,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:47:58,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:47:58,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:47:58,043 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 20:47:58,048 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 20:47:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:47:58,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 20:47:58,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:47:58,145 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 20:47:58,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:47:58,191 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 20:47:58,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:47:58,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895728995] [2023-03-31 20:47:58,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:47:58,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001372091] [2023-03-31 20:47:58,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001372091] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:47:58,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1998132482] [2023-03-31 20:47:58,195 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:47:58,195 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:47:58,195 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:47:58,195 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:47:58,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:47:58,268 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:47:58,732 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-03-31 20:47:58,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:47:58,756 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:47:59,037 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '394#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:47:59,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:47:59,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:47:59,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-03-31 20:47:59,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171840110] [2023-03-31 20:47:59,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:47:59,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 20:47:59,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:47:59,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 20:47:59,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2023-03-31 20:47:59,039 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:47:59,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:47:59,137 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2023-03-31 20:47:59,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 20:47:59,137 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19 [2023-03-31 20:47:59,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:47:59,139 INFO L225 Difference]: With dead ends: 48 [2023-03-31 20:47:59,139 INFO L226 Difference]: Without dead ends: 33 [2023-03-31 20:47:59,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2023-03-31 20:47:59,145 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:47:59,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 22 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:47:59,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-03-31 20:47:59,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2023-03-31 20:47:59,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:47:59,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-03-31 20:47:59,163 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2023-03-31 20:47:59,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:47:59,164 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-03-31 20:47:59,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:47:59,164 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-03-31 20:47:59,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-31 20:47:59,165 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:47:59,165 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:47:59,173 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 20:47:59,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-03-31 20:47:59,371 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:47:59,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:47:59,372 INFO L85 PathProgramCache]: Analyzing trace with hash -981913974, now seen corresponding path program 2 times [2023-03-31 20:47:59,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:47:59,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168613409] [2023-03-31 20:47:59,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:47:59,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:47:59,390 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:47:59,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490680638] [2023-03-31 20:47:59,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:47:59,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:47:59,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:47:59,395 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 20:47:59,397 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 20:47:59,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 20:47:59,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:47:59,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2023-03-31 20:47:59,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:47:59,617 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 20:47:59,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 41 [2023-03-31 20:47:59,666 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 20:47:59,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:47:59,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:47:59,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168613409] [2023-03-31 20:47:59,964 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:47:59,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490680638] [2023-03-31 20:47:59,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490680638] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:47:59,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1981567003] [2023-03-31 20:47:59,966 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:47:59,967 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:47:59,967 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:47:59,967 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:47:59,967 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:48:00,000 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:48:00,200 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-03-31 20:48:00,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:48:00,213 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:48:00,560 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '623#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:48:00,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:48:00,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 20:48:00,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-03-31 20:48:00,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065510364] [2023-03-31 20:48:00,561 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 20:48:00,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 20:48:00,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:48:00,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 20:48:00,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2023-03-31 20:48:00,563 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:48:00,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:48:00,702 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2023-03-31 20:48:00,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 20:48:00,703 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-03-31 20:48:00,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:48:00,704 INFO L225 Difference]: With dead ends: 36 [2023-03-31 20:48:00,704 INFO L226 Difference]: Without dead ends: 34 [2023-03-31 20:48:00,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2023-03-31 20:48:00,705 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:48:00,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 31 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:48:00,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-03-31 20:48:00,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2023-03-31 20:48:00,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:48:00,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-03-31 20:48:00,714 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 22 [2023-03-31 20:48:00,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:48:00,715 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-03-31 20:48:00,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:48:00,715 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-03-31 20:48:00,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-31 20:48:00,716 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:48:00,716 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:48:00,728 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 20:48:00,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:00,922 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:48:00,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:48:00,923 INFO L85 PathProgramCache]: Analyzing trace with hash 308032684, now seen corresponding path program 3 times [2023-03-31 20:48:00,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:48:00,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671567311] [2023-03-31 20:48:00,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:48:00,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:48:00,935 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:48:00,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171392779] [2023-03-31 20:48:00,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:48:00,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:00,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:48:00,939 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 20:48:00,940 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 20:48:01,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:48:01,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:48:01,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 20:48:01,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:48:01,060 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 20:48:01,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:48:01,128 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 20:48:01,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:48:01,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671567311] [2023-03-31 20:48:01,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:48:01,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171392779] [2023-03-31 20:48:01,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171392779] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:48:01,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [695506415] [2023-03-31 20:48:01,133 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:48:01,133 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:48:01,133 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:48:01,133 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:48:01,133 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:48:01,155 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:48:01,363 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-03-31 20:48:01,386 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:48:01,392 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:48:01,732 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '931#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:48:01,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:48:01,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:48:01,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-03-31 20:48:01,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667063727] [2023-03-31 20:48:01,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:48:01,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 20:48:01,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:48:01,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 20:48:01,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2023-03-31 20:48:01,735 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:48:01,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:48:01,961 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2023-03-31 20:48:01,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 20:48:01,962 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-03-31 20:48:01,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:48:01,965 INFO L225 Difference]: With dead ends: 83 [2023-03-31 20:48:01,965 INFO L226 Difference]: Without dead ends: 61 [2023-03-31 20:48:01,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2023-03-31 20:48:01,966 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 75 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:48:01,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 28 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:48:01,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-03-31 20:48:01,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2023-03-31 20:48:01,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:48:01,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2023-03-31 20:48:01,988 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 29 [2023-03-31 20:48:01,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:48:01,988 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2023-03-31 20:48:01,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:48:01,988 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2023-03-31 20:48:01,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-03-31 20:48:01,990 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:48:01,990 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:48:02,000 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 20:48:02,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:02,196 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:48:02,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:48:02,196 INFO L85 PathProgramCache]: Analyzing trace with hash 807107916, now seen corresponding path program 4 times [2023-03-31 20:48:02,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:48:02,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514574354] [2023-03-31 20:48:02,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:48:02,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:48:02,212 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:48:02,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861729791] [2023-03-31 20:48:02,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:48:02,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:02,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:48:02,214 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 20:48:02,219 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 20:48:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:48:02,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 13 conjunts are in the unsatisfiable core [2023-03-31 20:48:02,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:48:02,432 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 20:48:02,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:48:02,607 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 20:48:02,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:48:02,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514574354] [2023-03-31 20:48:02,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:48:02,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861729791] [2023-03-31 20:48:02,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861729791] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:48:02,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1595691416] [2023-03-31 20:48:02,609 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:48:02,610 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:48:02,610 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:48:02,610 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:48:02,610 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:48:02,631 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:48:02,816 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-03-31 20:48:02,822 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:48:02,826 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:48:03,137 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1379#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:48:03,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:48:03,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:48:03,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-03-31 20:48:03,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086439662] [2023-03-31 20:48:03,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:48:03,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-03-31 20:48:03,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:48:03,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-03-31 20:48:03,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1038, Unknown=0, NotChecked=0, Total=1406 [2023-03-31 20:48:03,139 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:48:03,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:48:03,665 INFO L93 Difference]: Finished difference Result 131 states and 163 transitions. [2023-03-31 20:48:03,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-03-31 20:48:03,666 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-03-31 20:48:03,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:48:03,667 INFO L225 Difference]: With dead ends: 131 [2023-03-31 20:48:03,667 INFO L226 Difference]: Without dead ends: 109 [2023-03-31 20:48:03,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=654, Invalid=1698, Unknown=0, NotChecked=0, Total=2352 [2023-03-31 20:48:03,668 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 137 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 20:48:03,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 29 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 20:48:03,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-03-31 20:48:03,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 50. [2023-03-31 20:48:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.05) internal successors, (42), 41 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:48:03,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2023-03-31 20:48:03,692 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 35 [2023-03-31 20:48:03,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:48:03,692 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2023-03-31 20:48:03,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:48:03,693 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2023-03-31 20:48:03,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 20:48:03,693 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:48:03,694 INFO L195 NwaCegarLoop]: trace histogram [22, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:48:03,703 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 20:48:03,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:03,902 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:48:03,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:48:03,902 INFO L85 PathProgramCache]: Analyzing trace with hash -165599604, now seen corresponding path program 5 times [2023-03-31 20:48:03,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:48:03,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375482169] [2023-03-31 20:48:03,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:48:03,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:48:03,931 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:48:03,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833645894] [2023-03-31 20:48:03,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:48:03,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:03,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:48:03,933 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 20:48:03,935 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 20:48:04,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 20:48:04,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:48:04,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 20:48:04,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:48:04,319 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 20:48:04,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 41 [2023-03-31 20:48:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2023-03-31 20:48:04,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:48:04,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:48:04,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375482169] [2023-03-31 20:48:04,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:48:04,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833645894] [2023-03-31 20:48:04,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833645894] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:48:04,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1288367946] [2023-03-31 20:48:04,574 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:48:04,574 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:48:04,574 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:48:04,574 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:48:04,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:48:04,591 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:48:04,763 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-03-31 20:48:04,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:48:04,771 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:48:05,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1886#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:48:05,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:48:05,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 20:48:05,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-03-31 20:48:05,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882270806] [2023-03-31 20:48:05,074 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 20:48:05,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 20:48:05,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:48:05,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 20:48:05,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-03-31 20:48:05,076 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:48:05,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:48:05,164 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2023-03-31 20:48:05,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 20:48:05,164 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2023-03-31 20:48:05,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:48:05,165 INFO L225 Difference]: With dead ends: 61 [2023-03-31 20:48:05,165 INFO L226 Difference]: Without dead ends: 59 [2023-03-31 20:48:05,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2023-03-31 20:48:05,166 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:48:05,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 34 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:48:05,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-03-31 20:48:05,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2023-03-31 20:48:05,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 46 states have internal predecessors, (47), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:48:05,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2023-03-31 20:48:05,180 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 47 [2023-03-31 20:48:05,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:48:05,180 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2023-03-31 20:48:05,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:48:05,181 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2023-03-31 20:48:05,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-03-31 20:48:05,186 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:48:05,190 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:48:05,202 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 20:48:05,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:05,400 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:48:05,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:48:05,400 INFO L85 PathProgramCache]: Analyzing trace with hash 454006378, now seen corresponding path program 6 times [2023-03-31 20:48:05,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:48:05,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210641721] [2023-03-31 20:48:05,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:48:05,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:48:05,420 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:48:05,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041768778] [2023-03-31 20:48:05,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:48:05,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:05,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:48:05,422 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 20:48:05,424 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 20:48:05,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:48:05,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:48:05,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 25 conjunts are in the unsatisfiable core [2023-03-31 20:48:05,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:48:05,905 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 20:48:05,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:48:06,424 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 20:48:06,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:48:06,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210641721] [2023-03-31 20:48:06,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:48:06,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041768778] [2023-03-31 20:48:06,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041768778] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:48:06,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [30485249] [2023-03-31 20:48:06,426 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:48:06,426 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:48:06,427 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:48:06,427 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:48:06,427 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:48:06,445 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:48:06,649 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-03-31 20:48:06,654 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:48:06,658 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:48:06,984 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2470#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:48:06,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:48:06,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:48:06,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2023-03-31 20:48:06,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557233573] [2023-03-31 20:48:06,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:48:06,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-03-31 20:48:06,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:48:06,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-03-31 20:48:06,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1244, Invalid=2538, Unknown=0, NotChecked=0, Total=3782 [2023-03-31 20:48:06,988 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:48:08,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:48:08,412 INFO L93 Difference]: Finished difference Result 238 states and 305 transitions. [2023-03-31 20:48:08,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-03-31 20:48:08,412 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2023-03-31 20:48:08,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:48:08,415 INFO L225 Difference]: With dead ends: 238 [2023-03-31 20:48:08,415 INFO L226 Difference]: Without dead ends: 209 [2023-03-31 20:48:08,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2134 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2394, Invalid=4746, Unknown=0, NotChecked=0, Total=7140 [2023-03-31 20:48:08,418 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 322 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 20:48:08,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 28 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 20:48:08,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-03-31 20:48:08,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 81. [2023-03-31 20:48:08,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 70 states have internal predecessors, (71), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:48:08,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2023-03-31 20:48:08,445 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 54 [2023-03-31 20:48:08,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:48:08,445 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2023-03-31 20:48:08,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:48:08,446 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2023-03-31 20:48:08,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-03-31 20:48:08,447 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:48:08,447 INFO L195 NwaCegarLoop]: trace histogram [46, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:48:08,459 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 20:48:08,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:08,660 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:48:08,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:48:08,660 INFO L85 PathProgramCache]: Analyzing trace with hash 595203050, now seen corresponding path program 7 times [2023-03-31 20:48:08,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:48:08,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804533517] [2023-03-31 20:48:08,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:48:08,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:48:08,699 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:48:08,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970022634] [2023-03-31 20:48:08,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:48:08,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:08,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:48:08,700 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 20:48:08,703 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 20:48:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:48:08,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 49 conjunts are in the unsatisfiable core [2023-03-31 20:48:08,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:48:10,005 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 20:48:10,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:48:11,742 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 20:48:11,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:48:11,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804533517] [2023-03-31 20:48:11,742 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:48:11,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970022634] [2023-03-31 20:48:11,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970022634] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:48:11,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2109948291] [2023-03-31 20:48:11,744 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:48:11,744 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:48:11,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:48:11,744 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:48:11,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:48:11,766 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:48:11,927 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-03-31 20:48:11,942 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:48:11,946 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:48:12,429 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3633#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:48:12,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:48:12,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:48:12,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2023-03-31 20:48:12,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548843760] [2023-03-31 20:48:12,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:48:12,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-03-31 20:48:12,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:48:12,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-03-31 20:48:12,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4724, Invalid=7266, Unknown=0, NotChecked=0, Total=11990 [2023-03-31 20:48:12,435 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 98 states, 98 states have (on average 1.1020408163265305) internal successors, (108), 98 states have internal predecessors, (108), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:48:16,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:48:16,913 INFO L93 Difference]: Finished difference Result 430 states and 569 transitions. [2023-03-31 20:48:16,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-03-31 20:48:16,914 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1020408163265305) internal successors, (108), 98 states have internal predecessors, (108), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 78 [2023-03-31 20:48:16,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:48:16,916 INFO L225 Difference]: With dead ends: 430 [2023-03-31 20:48:16,916 INFO L226 Difference]: Without dead ends: 401 [2023-03-31 20:48:16,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6598 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=9330, Invalid=15162, Unknown=0, NotChecked=0, Total=24492 [2023-03-31 20:48:16,922 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 796 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 1085 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1085 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:48:16,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [843 Valid, 46 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1085 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-03-31 20:48:16,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-03-31 20:48:16,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 129. [2023-03-31 20:48:16,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 117 states have (on average 1.017094017094017) internal successors, (119), 118 states have internal predecessors, (119), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:48:16,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2023-03-31 20:48:16,969 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 78 [2023-03-31 20:48:16,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:48:16,969 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2023-03-31 20:48:16,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1020408163265305) internal successors, (108), 98 states have internal predecessors, (108), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:48:16,970 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2023-03-31 20:48:16,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-03-31 20:48:16,971 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:48:16,971 INFO L195 NwaCegarLoop]: trace histogram [94, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:48:16,981 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 20:48:17,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-03-31 20:48:17,172 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:48:17,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:48:17,173 INFO L85 PathProgramCache]: Analyzing trace with hash 2098040554, now seen corresponding path program 8 times [2023-03-31 20:48:17,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:48:17,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479751716] [2023-03-31 20:48:17,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:48:17,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:48:17,236 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:48:17,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250244214] [2023-03-31 20:48:17,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:48:17,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:17,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:48:17,238 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 20:48:17,241 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 20:48:17,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-03-31 20:48:17,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:48:17,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 18 conjunts are in the unsatisfiable core [2023-03-31 20:48:17,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:48:18,151 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 20:48:18,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 41 [2023-03-31 20:48:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4498 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 4471 trivial. 0 not checked. [2023-03-31 20:48:18,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:48:18,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:48:18,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479751716] [2023-03-31 20:48:18,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:48:18,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250244214] [2023-03-31 20:48:18,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250244214] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:48:18,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2038744619] [2023-03-31 20:48:18,506 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:48:18,506 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:48:18,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:48:18,507 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:48:18,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:48:18,523 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:48:18,662 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-03-31 20:48:18,682 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:48:18,686 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:48:19,002 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5126#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:48:19,003 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:48:19,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 20:48:19,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-03-31 20:48:19,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179311032] [2023-03-31 20:48:19,003 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 20:48:19,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 20:48:19,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:48:19,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 20:48:19,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2023-03-31 20:48:19,005 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 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 20:48:19,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:48:19,144 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2023-03-31 20:48:19,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 20:48:19,145 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 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 126 [2023-03-31 20:48:19,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:48:19,146 INFO L225 Difference]: With dead ends: 140 [2023-03-31 20:48:19,146 INFO L226 Difference]: Without dead ends: 138 [2023-03-31 20:48:19,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2023-03-31 20:48:19,148 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:48:19,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 36 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:48:19,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-03-31 20:48:19,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2023-03-31 20:48:19,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 123 states have internal predecessors, (124), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 20:48:19,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2023-03-31 20:48:19,200 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 126 [2023-03-31 20:48:19,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:48:19,200 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2023-03-31 20:48:19,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 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 20:48:19,200 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2023-03-31 20:48:19,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-03-31 20:48:19,202 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:48:19,202 INFO L195 NwaCegarLoop]: trace histogram [94, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:48:19,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-31 20:48:19,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-31 20:48:19,409 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:48:19,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:48:19,409 INFO L85 PathProgramCache]: Analyzing trace with hash -779311028, now seen corresponding path program 9 times [2023-03-31 20:48:19,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:48:19,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101920718] [2023-03-31 20:48:19,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:48:19,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:48:19,467 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:48:19,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528435635] [2023-03-31 20:48:19,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:48:19,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:19,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:48:19,468 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:48:19,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-31 20:48:19,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:48:19,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:48:19,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 97 conjunts are in the unsatisfiable core [2023-03-31 20:48:19,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:48:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4523 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-03-31 20:48:23,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:48:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4523 backedges. 8 proven. 4465 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-03-31 20:48:30,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:48:30,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101920718] [2023-03-31 20:48:30,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:48:30,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528435635] [2023-03-31 20:48:30,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528435635] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:48:30,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1781467537] [2023-03-31 20:48:30,139 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:48:30,139 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:48:30,139 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:48:30,139 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:48:30,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:48:30,166 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:48:30,304 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-03-31 20:48:30,308 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:48:30,311 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:48:30,948 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6638#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:48:30,948 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:48:30,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:48:30,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 194 [2023-03-31 20:48:30,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469175071] [2023-03-31 20:48:30,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:48:30,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2023-03-31 20:48:30,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:48:30,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2023-03-31 20:48:30,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18596, Invalid=23634, Unknown=0, NotChecked=0, Total=42230 [2023-03-31 20:48:30,957 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 194 states, 194 states have (on average 1.0515463917525774) internal successors, (204), 194 states have internal predecessors, (204), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:48:52,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:48:52,217 INFO L93 Difference]: Finished difference Result 825 states and 1107 transitions. [2023-03-31 20:48:52,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2023-03-31 20:48:52,217 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 1.0515463917525774) internal successors, (204), 194 states have internal predecessors, (204), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 133 [2023-03-31 20:48:52,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:48:52,221 INFO L225 Difference]: With dead ends: 825 [2023-03-31 20:48:52,221 INFO L226 Difference]: Without dead ends: 789 [2023-03-31 20:48:52,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22438 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=37026, Invalid=53274, Unknown=0, NotChecked=0, Total=90300 [2023-03-31 20:48:52,229 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1614 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 2193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 2974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2193 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-31 20:48:52,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1709 Valid, 34 Invalid, 2974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2193 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-31 20:48:52,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2023-03-31 20:48:52,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 232. [2023-03-31 20:48:52,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 218 states have (on average 1.0091743119266054) internal successors, (220), 219 states have internal predecessors, (220), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 20:48:52,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2023-03-31 20:48:52,328 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 133 [2023-03-31 20:48:52,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:48:52,328 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2023-03-31 20:48:52,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 1.0515463917525774) internal successors, (204), 194 states have internal predecessors, (204), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:48:52,329 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2023-03-31 20:48:52,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-03-31 20:48:52,331 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:48:52,331 INFO L195 NwaCegarLoop]: trace histogram [190, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:48:52,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-31 20:48:52,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-03-31 20:48:52,541 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:48:52,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:48:52,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1366625716, now seen corresponding path program 10 times [2023-03-31 20:48:52,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:48:52,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477855229] [2023-03-31 20:48:52,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:48:52,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:48:52,643 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:48:52,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728764325] [2023-03-31 20:48:52,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:48:52,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:52,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:48:52,644 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:48:52,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-31 20:48:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:48:53,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 2032 conjuncts, 193 conjunts are in the unsatisfiable core [2023-03-31 20:48:53,262 INFO L285 TraceCheckSpWp]: Computing forward predicates...