/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-programs/partial_mod_count_limited_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:49:39,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:49:39,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:49:39,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 02:49:39,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 02:49:39,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 02:49:39,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 02:49:39,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 02:49:39,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 02:49:39,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 02:49:39,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 02:49:39,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 02:49:39,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 02:49:39,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 02:49:39,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 02:49:39,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 02:49:39,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 02:49:39,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:49:39,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:49:39,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:49:39,930 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 02:49:39,945 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:49:39,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:49:39,946 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:49:39,946 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:49:39,946 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:49:39,947 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:49:39,947 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:49:39,947 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:49:39,947 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:49:39,947 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:49:39,947 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:49:39,947 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:49:39,947 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:49:39,947 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:49:39,947 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:49:39,947 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:49:39,947 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:49:39,948 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:49:39,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:49:39,948 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:49:39,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:49:39,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:49:39,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:49:39,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:49:39,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:49:39,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:49:39,949 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:49:39,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:49:39,949 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:49:39,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:49:39,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:49:39,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:49:39,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:49:39,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:49:39,949 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:49:39,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:49:39,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:49:39,950 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:49:39,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:49:39,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:49:39,950 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:49:39,950 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:49:40,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:49:40,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:49:40,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:49:40,160 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:49:40,161 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:49:40,162 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c [2023-04-01 02:49:41,151 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:49:41,287 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:49:41,287 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c [2023-04-01 02:49:41,291 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e471ae76/3c55a41d7f8b472e9a6f629b52bc5ea4/FLAGf1ecdba33 [2023-04-01 02:49:41,301 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e471ae76/3c55a41d7f8b472e9a6f629b52bc5ea4 [2023-04-01 02:49:41,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:49:41,304 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:49:41,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:49:41,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:49:41,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:49:41,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:49:41" (1/1) ... [2023-04-01 02:49:41,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d383b28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:49:41, skipping insertion in model container [2023-04-01 02:49:41,308 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:49:41" (1/1) ... [2023-04-01 02:49:41,313 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:49:41,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:49:41,419 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c[331,344] [2023-04-01 02:49:41,431 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:49:41,437 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:49:41,445 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c[331,344] [2023-04-01 02:49:41,450 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:49:41,463 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:49:41,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:49:41 WrapperNode [2023-04-01 02:49:41,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:49:41,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:49:41,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:49:41,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:49:41,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:49:41" (1/1) ... [2023-04-01 02:49:41,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:49:41" (1/1) ... [2023-04-01 02:49:41,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:49:41" (1/1) ... [2023-04-01 02:49:41,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:49:41" (1/1) ... [2023-04-01 02:49:41,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:49:41" (1/1) ... [2023-04-01 02:49:41,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:49:41" (1/1) ... [2023-04-01 02:49:41,484 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:49:41" (1/1) ... [2023-04-01 02:49:41,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:49:41" (1/1) ... [2023-04-01 02:49:41,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:49:41,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:49:41,487 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:49:41,487 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:49:41,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:49:41" (1/1) ... [2023-04-01 02:49:41,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:49:41,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:49:41,514 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 02:49:41,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 02:49:41,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:49:41,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:49:41,549 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:49:41,550 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 02:49:41,550 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 02:49:41,550 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:49:41,550 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:49:41,550 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:49:41,551 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:49:41,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:49:41,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 02:49:41,551 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 02:49:41,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 02:49:41,551 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:49:41,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 02:49:41,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:49:41,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:49:41,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:49:41,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:49:41,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:49:41,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:49:41,600 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:49:41,601 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:49:41,783 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:49:41,885 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:49:41,885 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 02:49:41,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:49:41 BoogieIcfgContainer [2023-04-01 02:49:41,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:49:41,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:49:41,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:49:41,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:49:41,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:49:41" (1/3) ... [2023-04-01 02:49:41,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32885253 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:49:41, skipping insertion in model container [2023-04-01 02:49:41,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:49:41" (2/3) ... [2023-04-01 02:49:41,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32885253 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:49:41, skipping insertion in model container [2023-04-01 02:49:41,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:49:41" (3/3) ... [2023-04-01 02:49:41,897 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_3.c [2023-04-01 02:49:41,913 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:49:41,913 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:49:41,943 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:49:41,947 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;@21ebfa7b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:49:41,948 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:49:41,951 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:49:41,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 02:49:41,956 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:49:41,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:49:41,957 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:49:41,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:49:41,960 INFO L85 PathProgramCache]: Analyzing trace with hash 745588606, now seen corresponding path program 1 times [2023-04-01 02:49:41,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:49:41,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439777583] [2023-04-01 02:49:41,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:49:41,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:49:42,041 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:49:42,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608879756] [2023-04-01 02:49:42,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:49:42,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:42,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:49:42,045 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:49:42,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 02:49:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:49:42,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:49:42,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:49:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:49:42,213 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 02:49:42,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:49:42,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439777583] [2023-04-01 02:49:42,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:49:42,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608879756] [2023-04-01 02:49:42,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608879756] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:49:42,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:49:42,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 02:49:42,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804492663] [2023-04-01 02:49:42,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:49:42,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 02:49:42,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:49:42,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 02:49:42,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:49:42,248 INFO L87 Difference]: Start difference. First operand has 22 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:49:42,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:49:42,317 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2023-04-01 02:49:42,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 02:49:42,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-04-01 02:49:42,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:49:42,325 INFO L225 Difference]: With dead ends: 38 [2023-04-01 02:49:42,325 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 02:49:42,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:49:42,331 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:49:42,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 21 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:49:42,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 02:49:42,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2023-04-01 02:49:42,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:49:42,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-04-01 02:49:42,365 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2023-04-01 02:49:42,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:49:42,365 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-04-01 02:49:42,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:49:42,365 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-04-01 02:49:42,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 02:49:42,366 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:49:42,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:49:42,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 02:49:42,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 02:49:42,567 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:49:42,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:49:42,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1499595414, now seen corresponding path program 1 times [2023-04-01 02:49:42,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:49:42,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967456616] [2023-04-01 02:49:42,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:49:42,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:49:42,583 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:49:42,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172174620] [2023-04-01 02:49:42,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:49:42,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:42,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:49:42,587 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:49:42,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 02:49:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:49:42,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:49:42,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:49:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:49:42,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:49:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:49:42,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:49:42,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967456616] [2023-04-01 02:49:42,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:49:42,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172174620] [2023-04-01 02:49:42,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172174620] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:49:42,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [986688284] [2023-04-01 02:49:42,761 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 02:49:42,761 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:49:42,763 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:49:42,766 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:49:42,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:49:42,818 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:49:43,093 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-04-01 02:49:43,115 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-04-01 02:49:43,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:49:43,132 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:49:43,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [986688284] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:49:43,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:49:43,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [5, 5] total 21 [2023-04-01 02:49:43,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229263407] [2023-04-01 02:49:43,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:49:43,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 02:49:43,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:49:43,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 02:49:43,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-04-01 02:49:43,706 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 15 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:49:45,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:49:45,401 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2023-04-01 02:49:45,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 02:49:45,402 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-04-01 02:49:45,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:49:45,403 INFO L225 Difference]: With dead ends: 31 [2023-04-01 02:49:45,403 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 02:49:45,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=277, Invalid=983, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 02:49:45,405 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 02:49:45,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 6 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 02:49:45,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 02:49:45,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2023-04-01 02:49:45,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:49:45,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-04-01 02:49:45,412 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 16 [2023-04-01 02:49:45,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:49:45,413 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-04-01 02:49:45,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:49:45,413 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-04-01 02:49:45,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 02:49:45,413 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:49:45,413 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:49:45,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 02:49:45,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-01 02:49:45,619 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:49:45,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:49:45,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2095682240, now seen corresponding path program 1 times [2023-04-01 02:49:45,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:49:45,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562741392] [2023-04-01 02:49:45,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:49:45,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:49:45,630 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:49:45,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069796877] [2023-04-01 02:49:45,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:49:45,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:45,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:49:45,636 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:49:45,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 02:49:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:49:45,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:49:45,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:49:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 02:49:45,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:49:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 02:49:45,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:49:45,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562741392] [2023-04-01 02:49:45,758 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:49:45,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069796877] [2023-04-01 02:49:45,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069796877] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:49:45,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1479815546] [2023-04-01 02:49:45,760 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:49:45,760 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:49:45,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:49:45,761 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:49:45,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:49:45,786 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:49:46,185 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-01 02:49:46,198 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-04-01 02:49:46,206 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:49:46,210 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:49:46,832 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '530#(and (<= 1 |#StackHeapBarrier|) (= ~N~0 1000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:49:46,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:49:46,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:49:46,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-01 02:49:46,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592119091] [2023-04-01 02:49:46,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:49:46,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 02:49:46,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:49:46,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 02:49:46,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2023-04-01 02:49:46,835 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 02:49:46,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:49:46,925 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2023-04-01 02:49:46,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 02:49:46,925 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 23 [2023-04-01 02:49:46,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:49:46,926 INFO L225 Difference]: With dead ends: 52 [2023-04-01 02:49:46,926 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 02:49:46,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2023-04-01 02:49:46,927 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:49:46,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 20 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:49:46,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 02:49:46,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2023-04-01 02:49:46,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:49:46,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-04-01 02:49:46,936 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 23 [2023-04-01 02:49:46,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:49:46,936 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-04-01 02:49:46,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 02:49:46,936 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-04-01 02:49:46,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 02:49:46,937 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:49:46,937 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:49:46,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 02:49:47,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:47,143 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:49:47,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:49:47,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1823173036, now seen corresponding path program 2 times [2023-04-01 02:49:47,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:49:47,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15386816] [2023-04-01 02:49:47,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:49:47,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:49:47,156 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:49:47,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048454212] [2023-04-01 02:49:47,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:49:47,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:47,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:49:47,169 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:49:47,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 02:49:47,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 02:49:47,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:49:47,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 02:49:47,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:49:47,457 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:49:47,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 62 [2023-04-01 02:49:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:49:47,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:49:47,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:49:47,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15386816] [2023-04-01 02:49:47,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:49:47,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048454212] [2023-04-01 02:49:47,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048454212] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:49:47,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [270475740] [2023-04-01 02:49:47,720 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:49:47,720 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:49:47,721 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:49:47,721 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:49:47,721 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:49:47,738 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:49:48,035 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-01 02:49:48,043 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-04-01 02:49:48,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:49:48,051 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:49:50,847 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '786#(and (<= 1 |#StackHeapBarrier|) (= ~N~0 1000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:49:50,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:49:50,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 02:49:50,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-04-01 02:49:50,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510091730] [2023-04-01 02:49:50,847 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 02:49:50,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 02:49:50,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:49:50,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 02:49:50,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=733, Unknown=1, NotChecked=0, Total=870 [2023-04-01 02:49:50,849 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:49:51,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:49:51,990 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2023-04-01 02:49:51,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 02:49:51,991 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2023-04-01 02:49:51,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:49:51,992 INFO L225 Difference]: With dead ends: 40 [2023-04-01 02:49:51,992 INFO L226 Difference]: Without dead ends: 38 [2023-04-01 02:49:51,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=163, Invalid=892, Unknown=1, NotChecked=0, Total=1056 [2023-04-01 02:49:51,993 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:49:51,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 37 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 2 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 02:49:51,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-01 02:49:52,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2023-04-01 02:49:52,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 02:49:52,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2023-04-01 02:49:52,002 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 26 [2023-04-01 02:49:52,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:49:52,003 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2023-04-01 02:49:52,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:49:52,003 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2023-04-01 02:49:52,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 02:49:52,003 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:49:52,003 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:49:52,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 02:49:52,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:52,207 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:49:52,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:49:52,208 INFO L85 PathProgramCache]: Analyzing trace with hash 191173310, now seen corresponding path program 3 times [2023-04-01 02:49:52,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:49:52,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137378680] [2023-04-01 02:49:52,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:49:52,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:49:52,219 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:49:52,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63879230] [2023-04-01 02:49:52,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:49:52,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:52,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:49:52,221 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:49:52,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 02:49:52,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:49:52,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:49:52,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 02:49:52,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:49:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 02:49:52,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:49:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 02:49:52,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:49:52,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137378680] [2023-04-01 02:49:52,402 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:49:52,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63879230] [2023-04-01 02:49:52,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63879230] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:49:52,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2127808763] [2023-04-01 02:49:52,403 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:49:52,403 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:49:52,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:49:52,404 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:49:52,404 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:49:52,422 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:49:52,742 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-01 02:49:52,753 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-04-01 02:49:52,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:49:52,762 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:49:53,381 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1133#(and (<= 1 |#StackHeapBarrier|) (= ~N~0 1000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:49:53,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:49:53,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:49:53,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-01 02:49:53,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693983376] [2023-04-01 02:49:53,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:49:53,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 02:49:53,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:49:53,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 02:49:53,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2023-04-01 02:49:53,383 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 02:49:53,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:49:53,579 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2023-04-01 02:49:53,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 02:49:53,580 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 33 [2023-04-01 02:49:53,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:49:53,580 INFO L225 Difference]: With dead ends: 87 [2023-04-01 02:49:53,580 INFO L226 Difference]: Without dead ends: 65 [2023-04-01 02:49:53,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 02:49:53,582 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:49:53,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 32 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:49:53,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-04-01 02:49:53,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 42. [2023-04-01 02:49:53,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 02:49:53,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2023-04-01 02:49:53,618 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 33 [2023-04-01 02:49:53,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:49:53,621 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2023-04-01 02:49:53,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 02:49:53,621 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2023-04-01 02:49:53,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 02:49:53,622 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:49:53,622 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:49:53,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 02:49:53,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:53,823 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:49:53,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:49:53,823 INFO L85 PathProgramCache]: Analyzing trace with hash -547353794, now seen corresponding path program 4 times [2023-04-01 02:49:53,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:49:53,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612992329] [2023-04-01 02:49:53,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:49:53,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:49:53,835 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:49:53,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431060421] [2023-04-01 02:49:53,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:49:53,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:53,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:49:53,836 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:49:53,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 02:49:53,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:49:53,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 02:49:53,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:49:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 02:49:54,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:49:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 02:49:54,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:49:54,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612992329] [2023-04-01 02:49:54,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:49:54,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431060421] [2023-04-01 02:49:54,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431060421] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:49:54,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [690538573] [2023-04-01 02:49:54,185 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:49:54,185 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:49:54,185 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:49:54,186 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:49:54,186 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:49:54,208 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:49:54,522 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-01 02:49:54,532 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-04-01 02:49:54,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:49:54,543 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:49:55,211 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1620#(and (<= 1 |#StackHeapBarrier|) (= ~N~0 1000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:49:55,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:49:55,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:49:55,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-04-01 02:49:55,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592605043] [2023-04-01 02:49:55,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:49:55,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 02:49:55,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:49:55,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 02:49:55,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1257, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 02:49:55,233 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 02:49:56,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:49:56,087 INFO L93 Difference]: Finished difference Result 135 states and 167 transitions. [2023-04-01 02:49:56,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 02:49:56,087 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 39 [2023-04-01 02:49:56,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:49:56,088 INFO L225 Difference]: With dead ends: 135 [2023-04-01 02:49:56,088 INFO L226 Difference]: Without dead ends: 113 [2023-04-01 02:49:56,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=669, Invalid=1983, Unknown=0, NotChecked=0, Total=2652 [2023-04-01 02:49:56,089 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 177 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 02:49:56,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 31 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 02:49:56,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-04-01 02:49:56,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 54. [2023-04-01 02:49:56,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 43 states have internal predecessors, (44), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 02:49:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2023-04-01 02:49:56,107 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 39 [2023-04-01 02:49:56,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:49:56,107 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2023-04-01 02:49:56,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 02:49:56,107 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2023-04-01 02:49:56,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 02:49:56,108 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:49:56,108 INFO L195 NwaCegarLoop]: trace histogram [22, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:49:56,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 02:49:56,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:56,310 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:49:56,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:49:56,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1456939970, now seen corresponding path program 5 times [2023-04-01 02:49:56,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:49:56,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323276569] [2023-04-01 02:49:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:49:56,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:49:56,328 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:49:56,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186976212] [2023-04-01 02:49:56,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:49:56,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:56,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:49:56,329 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:49:56,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 02:49:56,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 02:49:56,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:49:56,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 38 conjunts are in the unsatisfiable core [2023-04-01 02:49:56,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:49:56,925 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:49:56,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 94 [2023-04-01 02:49:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2023-04-01 02:49:57,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:49:57,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:49:57,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323276569] [2023-04-01 02:49:57,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:49:57,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186976212] [2023-04-01 02:49:57,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186976212] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:49:57,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [941068239] [2023-04-01 02:49:57,259 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:49:57,259 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:49:57,259 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:49:57,259 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:49:57,259 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:49:57,273 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:49:57,536 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-01 02:49:57,544 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-04-01 02:49:57,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:49:57,552 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:50:02,293 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2159#(and (<= 1 |#StackHeapBarrier|) (= ~N~0 1000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:50:02,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:50:02,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 02:50:02,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-04-01 02:50:02,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797530113] [2023-04-01 02:50:02,294 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 02:50:02,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 02:50:02,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:50:02,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 02:50:02,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=894, Unknown=2, NotChecked=0, Total=1056 [2023-04-01 02:50:02,295 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 11 states have internal predecessors, (19), 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) [2023-04-01 02:50:05,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-04-01 02:50:07,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:50:07,413 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2023-04-01 02:50:07,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 02:50:07,414 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 11 states have internal predecessors, (19), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 51 [2023-04-01 02:50:07,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:50:07,414 INFO L225 Difference]: With dead ends: 65 [2023-04-01 02:50:07,414 INFO L226 Difference]: Without dead ends: 63 [2023-04-01 02:50:07,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=198, Invalid=1132, Unknown=2, NotChecked=0, Total=1332 [2023-04-01 02:50:07,415 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 8 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:50:07,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 133 Invalid, 7 Unknown, 0 Unchecked, 5.0s Time] [2023-04-01 02:50:07,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-01 02:50:07,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2023-04-01 02:50:07,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 48 states have internal predecessors, (49), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 02:50:07,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2023-04-01 02:50:07,431 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 51 [2023-04-01 02:50:07,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:50:07,431 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2023-04-01 02:50:07,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 11 states have internal predecessors, (19), 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) [2023-04-01 02:50:07,431 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2023-04-01 02:50:07,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 02:50:07,434 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:50:07,434 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:50:07,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 02:50:07,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:50:07,642 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:50:07,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:50:07,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1129383956, now seen corresponding path program 6 times [2023-04-01 02:50:07,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:50:07,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74684095] [2023-04-01 02:50:07,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:50:07,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:50:07,663 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:50:07,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413129688] [2023-04-01 02:50:07,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:50:07,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:50:07,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:50:07,669 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) [2023-04-01 02:50:07,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 02:50:07,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:50:07,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:50:07,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 02:50:07,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:50:08,162 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 02:50:08,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:50:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 6 proven. 253 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-01 02:50:08,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:50:08,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74684095] [2023-04-01 02:50:08,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:50:08,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413129688] [2023-04-01 02:50:08,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413129688] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:50:08,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1030989125] [2023-04-01 02:50:08,607 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:50:08,607 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:50:08,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:50:08,607 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:50:08,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:50:08,620 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:50:08,889 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-01 02:50:08,896 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-04-01 02:50:08,901 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:50:08,904 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:50:09,691 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2786#(and (<= 1 |#StackHeapBarrier|) (= ~N~0 1000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:50:09,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:50:09,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:50:09,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2023-04-01 02:50:09,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222882592] [2023-04-01 02:50:09,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:50:09,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-01 02:50:09,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:50:09,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-01 02:50:09,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=2901, Unknown=0, NotChecked=0, Total=4160 [2023-04-01 02:50:09,694 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 50 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 02:50:11,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:50:11,590 INFO L93 Difference]: Finished difference Result 242 states and 309 transitions. [2023-04-01 02:50:11,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-01 02:50:11,591 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 58 [2023-04-01 02:50:11,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:50:11,592 INFO L225 Difference]: With dead ends: 242 [2023-04-01 02:50:11,592 INFO L226 Difference]: Without dead ends: 213 [2023-04-01 02:50:11,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2418 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2409, Invalid=5247, Unknown=0, NotChecked=0, Total=7656 [2023-04-01 02:50:11,594 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 333 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:50:11,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 43 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 02:50:11,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-04-01 02:50:11,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 85. [2023-04-01 02:50:11,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 71 states have (on average 1.028169014084507) internal successors, (73), 72 states have internal predecessors, (73), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 02:50:11,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2023-04-01 02:50:11,636 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 58 [2023-04-01 02:50:11,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:50:11,636 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2023-04-01 02:50:11,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 02:50:11,636 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2023-04-01 02:50:11,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-01 02:50:11,637 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:50:11,638 INFO L195 NwaCegarLoop]: trace histogram [46, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:50:11,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 02:50:11,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-01 02:50:11,843 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:50:11,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:50:11,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1330091500, now seen corresponding path program 7 times [2023-04-01 02:50:11,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:50:11,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846179069] [2023-04-01 02:50:11,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:50:11,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:50:11,870 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:50:11,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280551357] [2023-04-01 02:50:11,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:50:11,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:50:11,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:50:11,871 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) [2023-04-01 02:50:11,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 02:50:12,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:50:12,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-01 02:50:12,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:50:13,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 02:50:13,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:50:14,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 6 proven. 1081 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-01 02:50:14,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:50:14,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846179069] [2023-04-01 02:50:14,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:50:14,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280551357] [2023-04-01 02:50:14,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280551357] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:50:14,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1028978536] [2023-04-01 02:50:14,584 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:50:14,584 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:50:14,584 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:50:14,585 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:50:14,585 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:50:14,601 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:50:14,866 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-01 02:50:14,872 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-04-01 02:50:14,877 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:50:14,880 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:50:15,825 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3988#(and (<= 1 |#StackHeapBarrier|) (= ~N~0 1000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:50:15,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:50:15,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:50:15,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2023-04-01 02:50:15,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745258644] [2023-04-01 02:50:15,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:50:15,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-04-01 02:50:15,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:50:15,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-04-01 02:50:15,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4739, Invalid=7917, Unknown=0, NotChecked=0, Total=12656 [2023-04-01 02:50:15,831 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 98 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 98 states have internal predecessors, (112), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 02:50:22,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:50:22,172 INFO L93 Difference]: Finished difference Result 434 states and 573 transitions. [2023-04-01 02:50:22,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-04-01 02:50:22,173 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 98 states have internal predecessors, (112), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 82 [2023-04-01 02:50:22,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:50:22,175 INFO L225 Difference]: With dead ends: 434 [2023-04-01 02:50:22,175 INFO L226 Difference]: Without dead ends: 405 [2023-04-01 02:50:22,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7170 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=9345, Invalid=16095, Unknown=0, NotChecked=0, Total=25440 [2023-04-01 02:50:22,179 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 676 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 830 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 830 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-01 02:50:22,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [723 Valid, 61 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [830 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-01 02:50:22,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2023-04-01 02:50:22,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 133. [2023-04-01 02:50:22,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 120 states have internal predecessors, (121), 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) [2023-04-01 02:50:22,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2023-04-01 02:50:22,238 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 82 [2023-04-01 02:50:22,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:50:22,238 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2023-04-01 02:50:22,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 98 states have internal predecessors, (112), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 02:50:22,238 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2023-04-01 02:50:22,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-04-01 02:50:22,242 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:50:22,242 INFO L195 NwaCegarLoop]: trace histogram [94, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:50:22,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-01 02:50:22,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:50:22,442 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:50:22,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:50:22,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1493881324, now seen corresponding path program 8 times [2023-04-01 02:50:22,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:50:22,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543507913] [2023-04-01 02:50:22,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:50:22,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:50:22,493 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:50:22,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327269774] [2023-04-01 02:50:22,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:50:22,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:50:22,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:50:22,494 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) [2023-04-01 02:50:22,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 02:50:22,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 02:50:22,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:50:22,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-01 02:50:22,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:50:23,704 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:50:23,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 99 [2023-04-01 02:50:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4498 backedges. 6 proven. 208 refuted. 0 times theorem prover too weak. 4284 trivial. 0 not checked. [2023-04-01 02:50:23,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:50:24,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:50:24,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543507913] [2023-04-01 02:50:24,905 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:50:24,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327269774] [2023-04-01 02:50:24,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327269774] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:50:24,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [957948477] [2023-04-01 02:50:24,906 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:50:24,906 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:50:24,906 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:50:24,906 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:50:24,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:50:24,924 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:50:25,193 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-01 02:50:25,200 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-04-01 02:50:25,204 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:50:25,207 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:50:32,011 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5510#(and (<= 1 |#StackHeapBarrier|) (= ~N~0 1000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:50:32,011 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:50:32,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 02:50:32,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-04-01 02:50:32,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103261371] [2023-04-01 02:50:32,011 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 02:50:32,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 02:50:32,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:50:32,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 02:50:32,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=953, Unknown=3, NotChecked=0, Total=1122 [2023-04-01 02:50:32,012 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 02:50:37,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-04-01 02:50:39,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-04-01 02:50:41,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-04-01 02:50:42,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-04-01 02:50:44,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-04-01 02:50:44,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:50:44,676 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2023-04-01 02:50:44,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 02:50:44,676 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 130 [2023-04-01 02:50:44,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:50:44,677 INFO L225 Difference]: With dead ends: 144 [2023-04-01 02:50:44,677 INFO L226 Difference]: Without dead ends: 142 [2023-04-01 02:50:44,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 231 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=193, Invalid=1136, Unknown=3, NotChecked=0, Total=1332 [2023-04-01 02:50:44,678 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 7 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2023-04-01 02:50:44,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 67 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 201 Invalid, 12 Unknown, 0 Unchecked, 12.6s Time] [2023-04-01 02:50:44,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-04-01 02:50:44,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2023-04-01 02:50:44,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 125 states have internal predecessors, (126), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 02:50:44,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2023-04-01 02:50:44,732 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 130 [2023-04-01 02:50:44,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:50:44,732 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2023-04-01 02:50:44,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 02:50:44,733 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2023-04-01 02:50:44,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-01 02:50:44,733 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:50:44,733 INFO L195 NwaCegarLoop]: trace histogram [94, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:50:44,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 02:50:44,934 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,SelfDestructingSolverStorable9 [2023-04-01 02:50:44,934 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:50:44,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:50:44,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1196694914, now seen corresponding path program 9 times [2023-04-01 02:50:44,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:50:44,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123444492] [2023-04-01 02:50:44,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:50:44,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:50:44,982 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:50:44,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609753585] [2023-04-01 02:50:44,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:50:44,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:50:44,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:50:44,983 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) [2023-04-01 02:50:44,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 02:50:45,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:50:45,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:50:45,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 97 conjunts are in the unsatisfiable core [2023-04-01 02:50:45,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:50:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4523 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-04-01 02:50:48,579 INFO L327 TraceCheckSpWp]: Computing backward predicates...