/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_mul_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 14:21:29,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 14:21:29,199 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 14:21:29,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 14:21:29,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 14:21:29,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 14:21:29,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 14:21:29,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 14:21:29,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 14:21:29,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 14:21:29,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 14:21:29,237 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 14:21:29,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 14:21:29,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 14:21:29,240 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 14:21:29,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 14:21:29,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 14:21:29,246 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 14:21:29,247 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 14:21:29,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 14:21:29,248 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 14:21:29,249 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 14:21:29,249 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 14:21:29,250 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 14:21:29,250 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 14:21:29,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 14:21:29,251 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 14:21:29,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 14:21:29,254 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 14:21:29,279 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 14:21:29,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 14:21:29,280 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 14:21:29,280 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 14:21:29,283 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 14:21:29,284 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 14:21:29,284 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 14:21:29,284 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 14:21:29,284 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 14:21:29,284 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 14:21:29,285 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 14:21:29,285 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 14:21:29,285 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 14:21:29,285 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 14:21:29,285 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 14:21:29,285 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 14:21:29,286 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 14:21:29,286 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 14:21:29,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 14:21:29,286 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 14:21:29,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 14:21:29,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 14:21:29,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 14:21:29,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 14:21:29,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 14:21:29,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 14:21:29,288 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 14:21:29,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 14:21:29,288 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 14:21:29,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 14:21:29,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 14:21:29,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 14:21:29,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:21:29,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 14:21:29,289 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 14:21:29,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 14:21:29,289 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 14:21:29,289 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 14:21:29,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 14:21:29,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 14:21:29,289 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 14:21:29,289 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 14:21:29,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 14:21:29,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 14:21:29,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 14:21:29,544 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 14:21:29,545 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 14:21:29,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_mul_init.i [2023-04-02 14:21:30,810 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 14:21:30,967 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 14:21:30,968 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_mul_init.i [2023-04-02 14:21:30,972 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e7537595/83f763ce31594a3b9a94bc2700d57ae4/FLAGb32bee46f [2023-04-02 14:21:30,988 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e7537595/83f763ce31594a3b9a94bc2700d57ae4 [2023-04-02 14:21:30,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 14:21:30,994 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 14:21:30,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 14:21:30,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 14:21:30,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 14:21:30,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:21:30" (1/1) ... [2023-04-02 14:21:31,000 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15fd5914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:21:31, skipping insertion in model container [2023-04-02 14:21:31,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:21:30" (1/1) ... [2023-04-02 14:21:31,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 14:21:31,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 14:21:31,132 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-industry-pattern/array_of_struct_ptr_mul_init.i[821,834] [2023-04-02 14:21:31,159 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:21:32,367 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 14:21:32,378 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-industry-pattern/array_of_struct_ptr_mul_init.i[821,834] [2023-04-02 14:21:32,386 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:21:32,400 INFO L208 MainTranslator]: Completed translation [2023-04-02 14:21:32,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:21:32 WrapperNode [2023-04-02 14:21:32,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 14:21:32,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 14:21:32,401 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 14:21:32,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 14:21:32,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:21:32" (1/1) ... [2023-04-02 14:21:32,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:21:32" (1/1) ... [2023-04-02 14:21:32,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:21:32" (1/1) ... [2023-04-02 14:21:32,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:21:32" (1/1) ... [2023-04-02 14:21:32,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:21:32" (1/1) ... [2023-04-02 14:21:32,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:21:32" (1/1) ... [2023-04-02 14:21:32,431 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:21:32" (1/1) ... [2023-04-02 14:21:32,431 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:21:32" (1/1) ... [2023-04-02 14:21:32,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 14:21:32,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 14:21:32,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 14:21:32,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 14:21:32,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:21:32" (1/1) ... [2023-04-02 14:21:32,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:21:32,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:21:32,478 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 14:21:32,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 14:21:32,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 14:21:32,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 14:21:32,521 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 14:21:32,521 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 14:21:32,521 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 14:21:32,521 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 14:21:32,521 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 14:21:32,521 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 14:21:32,522 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 14:21:32,522 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 14:21:32,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 14:21:32,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 14:21:32,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-04-02 14:21:32,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-02 14:21:32,522 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 14:21:32,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 14:21:32,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 14:21:32,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 14:21:32,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 14:21:32,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 14:21:32,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 14:21:32,625 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 14:21:32,627 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 14:21:32,838 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 14:21:32,906 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 14:21:32,906 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-02 14:21:32,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:21:32 BoogieIcfgContainer [2023-04-02 14:21:32,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 14:21:32,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 14:21:32,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 14:21:32,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 14:21:32,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:21:30" (1/3) ... [2023-04-02 14:21:32,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60fbb824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:21:32, skipping insertion in model container [2023-04-02 14:21:32,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:21:32" (2/3) ... [2023-04-02 14:21:32,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60fbb824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:21:32, skipping insertion in model container [2023-04-02 14:21:32,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:21:32" (3/3) ... [2023-04-02 14:21:32,918 INFO L112 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_mul_init.i [2023-04-02 14:21:32,936 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 14:21:32,937 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 14:21:32,978 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 14:21:32,984 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;@2cec5835, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 14:21:32,984 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 14:21:32,987 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:21:32,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 14:21:32,993 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:21:32,994 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:21:32,994 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:21:32,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:21:32,998 INFO L85 PathProgramCache]: Analyzing trace with hash 761979803, now seen corresponding path program 1 times [2023-04-02 14:21:33,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:21:33,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763324199] [2023-04-02 14:21:33,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:21:33,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:21:33,095 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:21:33,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244637739] [2023-04-02 14:21:33,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:21:33,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:21:33,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:21:33,100 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:21:33,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 14:21:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:21:33,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 14:21:33,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:21:33,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:21:33,208 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 14:21:33,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:21:33,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763324199] [2023-04-02 14:21:33,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:21:33,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244637739] [2023-04-02 14:21:33,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244637739] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:21:33,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:21:33,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 14:21:33,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406560542] [2023-04-02 14:21:33,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:21:33,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:21:33,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:21:33,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:21:33,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:21:33,242 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:21:33,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:21:33,286 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2023-04-02 14:21:33,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:21:33,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-02 14:21:33,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:21:33,296 INFO L225 Difference]: With dead ends: 37 [2023-04-02 14:21:33,296 INFO L226 Difference]: Without dead ends: 21 [2023-04-02 14:21:33,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:21:33,305 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:21:33,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:21:33,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-02 14:21:33,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2023-04-02 14:21:33,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:21:33,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-04-02 14:21:33,349 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2023-04-02 14:21:33,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:21:33,349 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-04-02 14:21:33,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:21:33,350 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-04-02 14:21:33,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 14:21:33,351 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:21:33,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:21:33,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 14:21:33,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 14:21:33,557 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:21:33,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:21:33,558 INFO L85 PathProgramCache]: Analyzing trace with hash -579542905, now seen corresponding path program 1 times [2023-04-02 14:21:33,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:21:33,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736896895] [2023-04-02 14:21:33,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:21:33,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:21:33,586 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:21:33,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964253334] [2023-04-02 14:21:33,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:21:33,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:21:33,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:21:33,598 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:21:33,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 14:21:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:21:33,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:21:33,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:21:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 14:21:33,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:21:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 14:21:33,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:21:33,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736896895] [2023-04-02 14:21:33,717 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:21:33,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964253334] [2023-04-02 14:21:33,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964253334] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:21:33,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1341163633] [2023-04-02 14:21:33,737 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:21:33,738 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:21:33,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:21:33,745 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:21:33,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:21:33,914 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 14:21:34,204 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 63 for LOIs [2023-04-02 14:21:34,280 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 14:21:34,294 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:21:34,677 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '228#(and (not (= (mod (select (select |#memory_int| 3) 2) 65536) (* (mod (select (select |#memory_int| 3) 0) 65536) (mod (select (select |#memory_int| 3) 0) 65536)))) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (mod (select (select |#memory_int| 3) 2) 65536) (mod (select (select |#memory_int| 3) 0) 65536))) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:21:34,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:21:34,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:21:34,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-04-02 14:21:34,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744405609] [2023-04-02 14:21:34,678 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:21:34,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 14:21:34,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:21:34,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 14:21:34,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-04-02 14:21:34,680 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:21:34,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:21:34,746 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2023-04-02 14:21:34,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:21:34,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-02 14:21:34,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:21:34,747 INFO L225 Difference]: With dead ends: 45 [2023-04-02 14:21:34,747 INFO L226 Difference]: Without dead ends: 34 [2023-04-02 14:21:34,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-04-02 14:21:34,749 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:21:34,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 20 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:21:34,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-02 14:21:34,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2023-04-02 14:21:34,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:21:34,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-04-02 14:21:34,755 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2023-04-02 14:21:34,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:21:34,755 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-04-02 14:21:34,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:21:34,755 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-04-02 14:21:34,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-02 14:21:34,756 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:21:34,756 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:21:34,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 14:21:34,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-02 14:21:34,968 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:21:34,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:21:34,969 INFO L85 PathProgramCache]: Analyzing trace with hash -2087333733, now seen corresponding path program 2 times [2023-04-02 14:21:34,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:21:34,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528160023] [2023-04-02 14:21:34,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:21:34,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:21:35,009 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:21:35,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870119989] [2023-04-02 14:21:35,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:21:35,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:21:35,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:21:35,017 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:21:35,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 14:21:35,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 14:21:35,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:21:35,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 14:21:35,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:21:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:21:35,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:21:35,257 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:21:35,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:21:35,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528160023] [2023-04-02 14:21:35,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:21:35,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870119989] [2023-04-02 14:21:35,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870119989] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:21:35,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [15573216] [2023-04-02 14:21:35,260 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:21:35,261 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:21:35,261 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:21:35,261 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:21:35,261 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:21:35,328 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 14:21:35,476 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 63 for LOIs [2023-04-02 14:21:35,517 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 14:21:35,527 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:21:36,353 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '482#(and (not (= (mod (select (select |#memory_int| 3) 2) 65536) (* (mod (select (select |#memory_int| 3) 0) 65536) (mod (select (select |#memory_int| 3) 0) 65536)))) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (mod (select (select |#memory_int| 3) 2) 65536) (mod (select (select |#memory_int| 3) 0) 65536))) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:21:36,354 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:21:36,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:21:36,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-04-02 14:21:36,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709260655] [2023-04-02 14:21:36,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:21:36,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 14:21:36,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:21:36,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 14:21:36,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2023-04-02 14:21:36,356 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:21:36,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:21:36,505 INFO L93 Difference]: Finished difference Result 78 states and 102 transitions. [2023-04-02 14:21:36,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 14:21:36,506 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-04-02 14:21:36,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:21:36,507 INFO L225 Difference]: With dead ends: 78 [2023-04-02 14:21:36,507 INFO L226 Difference]: Without dead ends: 64 [2023-04-02 14:21:36,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2023-04-02 14:21:36,508 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:21:36,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 20 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:21:36,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-04-02 14:21:36,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 36. [2023-04-02 14:21:36,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:21:36,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2023-04-02 14:21:36,520 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 20 [2023-04-02 14:21:36,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:21:36,521 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2023-04-02 14:21:36,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:21:36,521 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2023-04-02 14:21:36,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 14:21:36,522 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:21:36,522 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:21:36,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 14:21:36,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:21:36,730 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:21:36,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:21:36,730 INFO L85 PathProgramCache]: Analyzing trace with hash 940057627, now seen corresponding path program 3 times [2023-04-02 14:21:36,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:21:36,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911329623] [2023-04-02 14:21:36,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:21:36,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:21:36,776 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:21:36,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274970095] [2023-04-02 14:21:36,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:21:36,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:21:36,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:21:36,778 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:21:36,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 14:21:36,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:21:36,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:21:36,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 14:21:36,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:21:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 14:21:36,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:21:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 14:21:37,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:21:37,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911329623] [2023-04-02 14:21:37,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:21:37,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274970095] [2023-04-02 14:21:37,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274970095] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:21:37,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [128110220] [2023-04-02 14:21:37,226 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:21:37,226 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:21:37,226 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:21:37,226 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:21:37,226 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:21:37,270 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 14:21:37,381 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 63 for LOIs [2023-04-02 14:21:37,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 14:21:37,428 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:21:37,808 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '904#(and (not (= (mod (select (select |#memory_int| 3) 2) 65536) (* (mod (select (select |#memory_int| 3) 0) 65536) (mod (select (select |#memory_int| 3) 0) 65536)))) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (mod (select (select |#memory_int| 3) 2) 65536) (mod (select (select |#memory_int| 3) 0) 65536))) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:21:37,808 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:21:37,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:21:37,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-04-02 14:21:37,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655431096] [2023-04-02 14:21:37,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:21:37,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-02 14:21:37,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:21:37,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-02 14:21:37,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=768, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 14:21:37,811 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:21:38,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:21:38,363 INFO L93 Difference]: Finished difference Result 144 states and 192 transitions. [2023-04-02 14:21:38,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 14:21:38,363 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2023-04-02 14:21:38,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:21:38,365 INFO L225 Difference]: With dead ends: 144 [2023-04-02 14:21:38,365 INFO L226 Difference]: Without dead ends: 124 [2023-04-02 14:21:38,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=354, Invalid=768, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 14:21:38,367 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 73 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 14:21:38,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 38 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 14:21:38,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-04-02 14:21:38,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 60. [2023-04-02 14:21:38,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:21:38,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2023-04-02 14:21:38,384 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 32 [2023-04-02 14:21:38,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:21:38,384 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2023-04-02 14:21:38,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:21:38,385 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2023-04-02 14:21:38,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-02 14:21:38,386 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:21:38,386 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:21:38,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 14:21:38,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:21:38,594 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:21:38,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:21:38,595 INFO L85 PathProgramCache]: Analyzing trace with hash -259904741, now seen corresponding path program 4 times [2023-04-02 14:21:38,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:21:38,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10260018] [2023-04-02 14:21:38,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:21:38,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:21:38,676 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:21:38,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747158262] [2023-04-02 14:21:38,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:21:38,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:21:38,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:21:38,678 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:21:38,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 14:21:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:21:38,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 14:21:38,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:21:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 14:21:39,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:21:39,931 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 14:21:39,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:21:39,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10260018] [2023-04-02 14:21:39,932 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:21:39,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747158262] [2023-04-02 14:21:39,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747158262] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:21:39,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [405059233] [2023-04-02 14:21:39,934 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:21:39,934 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:21:39,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:21:39,935 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:21:39,935 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:21:39,976 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 14:21:40,053 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 63 for LOIs [2023-04-02 14:21:40,079 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 14:21:40,086 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:21:40,810 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1662#(and (not (= (mod (select (select |#memory_int| 3) 2) 65536) (* (mod (select (select |#memory_int| 3) 0) 65536) (mod (select (select |#memory_int| 3) 0) 65536)))) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (mod (select (select |#memory_int| 3) 2) 65536) (mod (select (select |#memory_int| 3) 0) 65536))) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:21:40,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:21:40,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:21:40,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2023-04-02 14:21:40,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287746245] [2023-04-02 14:21:40,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:21:40,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-04-02 14:21:40,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:21:40,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-04-02 14:21:40,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1254, Invalid=2052, Unknown=0, NotChecked=0, Total=3306 [2023-04-02 14:21:40,814 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 48 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:21:41,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:21:41,827 INFO L93 Difference]: Finished difference Result 276 states and 372 transitions. [2023-04-02 14:21:41,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-02 14:21:41,828 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-02 14:21:41,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:21:41,830 INFO L225 Difference]: With dead ends: 276 [2023-04-02 14:21:41,830 INFO L226 Difference]: Without dead ends: 244 [2023-04-02 14:21:41,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1254, Invalid=2052, Unknown=0, NotChecked=0, Total=3306 [2023-04-02 14:21:41,833 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 153 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 14:21:41,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 47 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 14:21:41,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-04-02 14:21:41,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 108. [2023-04-02 14:21:41,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:21:41,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2023-04-02 14:21:41,854 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 56 [2023-04-02 14:21:41,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:21:41,855 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2023-04-02 14:21:41,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:21:41,855 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2023-04-02 14:21:41,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-02 14:21:41,857 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:21:41,857 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:21:41,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-02 14:21:42,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:21:42,064 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:21:42,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:21:42,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1017887003, now seen corresponding path program 5 times [2023-04-02 14:21:42,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:21:42,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101188799] [2023-04-02 14:21:42,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:21:42,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:21:42,168 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:21:42,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671603335] [2023-04-02 14:21:42,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:21:42,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:21:42,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:21:42,177 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:21:42,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process