/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/array-industry-pattern/array_of_struct_single_elem_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 20:42:14,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 20:42:14,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 20:42:14,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-31 20:42:14,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 20:42:14,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 20:42:14,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 20:42:14,268 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 20:42:14,281 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 20:42:14,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 20:42:14,281 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 20:42:14,281 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 20:42:14,282 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 20:42:14,282 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 20:42:14,282 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 20:42:14,282 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 20:42:14,282 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 20:42:14,282 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 20:42:14,282 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 20:42:14,283 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 20:42:14,283 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 20:42:14,283 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 20:42:14,283 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 20:42:14,283 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 20:42:14,283 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 20:42:14,283 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 20:42:14,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 20:42:14,284 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 20:42:14,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 20:42:14,284 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 20:42:14,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 20:42:14,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 20:42:14,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 20:42:14,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 20:42:14,285 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 20:42:14,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 20:42:14,285 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 20:42:14,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 20:42:14,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 20:42:14,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 20:42:14,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:42:14,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 20:42:14,286 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 20:42:14,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 20:42:14,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 20:42:14,286 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 20:42:14,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 20:42:14,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 20:42:14,286 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 20:42:14,286 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 20:42:14,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 20:42:14,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 20:42:14,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 20:42:14,456 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 20:42:14,456 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 20:42:14,457 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_of_struct_single_elem_init.i [2023-03-31 20:42:15,506 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 20:42:15,666 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 20:42:15,666 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_single_elem_init.i [2023-03-31 20:42:15,670 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30f4917e4/f77a62278eab46fe91909ae752d28910/FLAGf8bd86656 [2023-03-31 20:42:15,679 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30f4917e4/f77a62278eab46fe91909ae752d28910 [2023-03-31 20:42:15,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 20:42:15,682 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 20:42:15,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 20:42:15,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 20:42:15,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 20:42:15,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:42:15" (1/1) ... [2023-03-31 20:42:15,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@de89c93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:42:15, skipping insertion in model container [2023-03-31 20:42:15,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:42:15" (1/1) ... [2023-03-31 20:42:15,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 20:42:15,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 20:42:15,826 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_single_elem_init.i[865,878] [2023-03-31 20:42:15,835 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:42:17,139 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 20:42:17,148 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_single_elem_init.i[865,878] [2023-03-31 20:42:17,161 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:42:17,183 INFO L208 MainTranslator]: Completed translation [2023-03-31 20:42:17,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:42:17 WrapperNode [2023-03-31 20:42:17,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 20:42:17,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 20:42:17,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 20:42:17,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 20:42:17,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:42:17" (1/1) ... [2023-03-31 20:42:17,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:42:17" (1/1) ... [2023-03-31 20:42:17,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:42:17" (1/1) ... [2023-03-31 20:42:17,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:42:17" (1/1) ... [2023-03-31 20:42:17,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:42:17" (1/1) ... [2023-03-31 20:42:17,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:42:17" (1/1) ... [2023-03-31 20:42:17,229 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:42:17" (1/1) ... [2023-03-31 20:42:17,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:42:17" (1/1) ... [2023-03-31 20:42:17,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 20:42:17,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 20:42:17,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 20:42:17,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 20:42:17,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:42:17" (1/1) ... [2023-03-31 20:42:17,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:42:17,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:42:17,266 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 20:42:17,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 20:42:17,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 20:42:17,294 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 20:42:17,294 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 20:42:17,294 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 20:42:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 20:42:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 20:42:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 20:42:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 20:42:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 20:42:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 20:42:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 20:42:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 20:42:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 20:42:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 20:42:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 20:42:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 20:42:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 20:42:17,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 20:42:17,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 20:42:17,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 20:42:17,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 20:42:17,368 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 20:42:17,370 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 20:42:17,542 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 20:42:17,583 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 20:42:17,583 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 20:42:17,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:42:17 BoogieIcfgContainer [2023-03-31 20:42:17,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 20:42:17,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 20:42:17,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 20:42:17,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 20:42:17,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 08:42:15" (1/3) ... [2023-03-31 20:42:17,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642417aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:42:17, skipping insertion in model container [2023-03-31 20:42:17,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:42:17" (2/3) ... [2023-03-31 20:42:17,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642417aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:42:17, skipping insertion in model container [2023-03-31 20:42:17,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:42:17" (3/3) ... [2023-03-31 20:42:17,591 INFO L112 eAbstractionObserver]: Analyzing ICFG array_of_struct_single_elem_init.i [2023-03-31 20:42:17,609 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 20:42:17,609 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 20:42:17,643 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 20:42:17,649 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;@4f4eecc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 20:42:17,649 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 20:42:17,653 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:42:17,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-03-31 20:42:17,660 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:42:17,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:42:17,661 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:42:17,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:42:17,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1789234444, now seen corresponding path program 1 times [2023-03-31 20:42:17,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:42:17,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446184859] [2023-03-31 20:42:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:42:17,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:42:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:42:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:42:17,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:42:17,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446184859] [2023-03-31 20:42:17,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446184859] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:42:17,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:42:17,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 20:42:17,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227657584] [2023-03-31 20:42:17,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:42:17,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 20:42:17,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:42:17,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 20:42:17,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:42:17,869 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:42:17,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:42:17,920 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2023-03-31 20:42:17,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 20:42:17,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-03-31 20:42:17,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:42:17,926 INFO L225 Difference]: With dead ends: 40 [2023-03-31 20:42:17,926 INFO L226 Difference]: Without dead ends: 23 [2023-03-31 20:42:17,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:42:17,931 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:42:17,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 31 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:42:17,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-03-31 20:42:17,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2023-03-31 20:42:17,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:42:17,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-03-31 20:42:17,955 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2023-03-31 20:42:17,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:42:17,955 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-03-31 20:42:17,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:42:17,955 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-03-31 20:42:17,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-03-31 20:42:17,956 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:42:17,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:42:17,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 20:42:17,956 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:42:17,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:42:17,957 INFO L85 PathProgramCache]: Analyzing trace with hash -64648684, now seen corresponding path program 1 times [2023-03-31 20:42:17,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:42:17,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379533428] [2023-03-31 20:42:17,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:42:17,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:42:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:42:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:42:18,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:42:18,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379533428] [2023-03-31 20:42:18,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379533428] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:42:18,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614708296] [2023-03-31 20:42:18,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:42:18,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:42:18,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:42:18,107 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:42:18,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 20:42:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:42:18,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 20:42:18,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:42:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:42:18,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:42:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:42:18,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614708296] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:42:18,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [152133227] [2023-03-31 20:42:18,264 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-03-31 20:42:18,264 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:42:18,266 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:42:18,269 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:42:18,270 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:42:18,362 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-03-31 20:42:18,505 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2023-03-31 20:42:18,538 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-03-31 20:42:18,549 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:42:18,970 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '189#(and (= (select (select |#memory_int| 3) 4) 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_#length_26| (Array Int Int)) (|v_main_~#s1~0.base_BEFORE_CALL_1| Int) (|v_#valid_36| (Array Int Int))) (and (= (select (select |#memory_int| |v_main_~#s1~0.base_BEFORE_CALL_1|) 4) 0) (< |#StackHeapBarrier| |v_main_~#s1~0.base_BEFORE_CALL_1|) (= (store |v_#length_26| |v_main_~#s1~0.base_BEFORE_CALL_1| 8) |#length|) (= (store |v_#valid_36| |v_main_~#s1~0.base_BEFORE_CALL_1| 1) |#valid|) (not (= (select (select |#memory_int| |v_main_~#s1~0.base_BEFORE_CALL_1|) 0) 10)) (= (select |v_#valid_36| |v_main_~#s1~0.base_BEFORE_CALL_1|) 0) (not (= |v_main_~#s1~0.base_BEFORE_CALL_1| 0)) (= (select (select |#memory_int| |v_main_~#s1~0.base_BEFORE_CALL_1|) 0) (select (select |#memory_int| 3) 0)))) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (exists ((|v_#memory_int_58| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_58| 3 (store (store (select |v_#memory_int_58| 3) 24 30) 28 40)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:42:18,971 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:42:18,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:42:18,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-03-31 20:42:18,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476791966] [2023-03-31 20:42:18,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:42:18,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 20:42:18,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:42:18,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 20:42:18,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-03-31 20:42:18,973 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:42:19,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:42:19,034 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2023-03-31 20:42:19,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 20:42:19,034 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-03-31 20:42:19,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:42:19,036 INFO L225 Difference]: With dead ends: 48 [2023-03-31 20:42:19,036 INFO L226 Difference]: Without dead ends: 37 [2023-03-31 20:42:19,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-03-31 20:42:19,038 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:42:19,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 45 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:42:19,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-03-31 20:42:19,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 21. [2023-03-31 20:42:19,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:42:19,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-03-31 20:42:19,048 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2023-03-31 20:42:19,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:42:19,048 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-03-31 20:42:19,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:42:19,048 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-03-31 20:42:19,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-03-31 20:42:19,049 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:42:19,049 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:42:19,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 20:42:19,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:42:19,256 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:42:19,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:42:19,257 INFO L85 PathProgramCache]: Analyzing trace with hash -918515956, now seen corresponding path program 2 times [2023-03-31 20:42:19,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:42:19,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115620422] [2023-03-31 20:42:19,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:42:19,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:42:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:42:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:42:19,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:42:19,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115620422] [2023-03-31 20:42:19,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115620422] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:42:19,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384985014] [2023-03-31 20:42:19,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:42:19,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:42:19,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:42:19,394 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:42:19,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 20:42:19,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 20:42:19,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:42:19,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 20:42:19,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:42:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:42:19,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:42:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:42:19,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384985014] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:42:19,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [358032515] [2023-03-31 20:42:19,535 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-03-31 20:42:19,535 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:42:19,535 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:42:19,535 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:42:19,535 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:42:19,564 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-03-31 20:42:19,626 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2023-03-31 20:42:19,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-03-31 20:42:19,653 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:42:20,056 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '409#(and (exists ((|v_#memory_int_79| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_79| 3 (store (store (select |v_#memory_int_79| 3) 24 30) 28 40)))) (= (select (select |#memory_int| 3) 4) 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (exists ((|v_#valid_44| (Array Int Int)) (|v_#length_34| (Array Int Int)) (|v_main_~#s1~0.base_BEFORE_CALL_2| Int)) (and (= (select |v_#valid_44| |v_main_~#s1~0.base_BEFORE_CALL_2|) 0) (= |#length| (store |v_#length_34| |v_main_~#s1~0.base_BEFORE_CALL_2| 8)) (not (= |v_main_~#s1~0.base_BEFORE_CALL_2| 0)) (not (= (select (select |#memory_int| |v_main_~#s1~0.base_BEFORE_CALL_2|) 0) 10)) (= (store |v_#valid_44| |v_main_~#s1~0.base_BEFORE_CALL_2| 1) |#valid|) (= (select (select |#memory_int| |v_main_~#s1~0.base_BEFORE_CALL_2|) 4) 0) (= (select (select |#memory_int| 3) 0) (select (select |#memory_int| |v_main_~#s1~0.base_BEFORE_CALL_2|) 0)) (< |#StackHeapBarrier| |v_main_~#s1~0.base_BEFORE_CALL_2|))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:42:20,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:42:20,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:42:20,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-03-31 20:42:20,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236870686] [2023-03-31 20:42:20,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:42:20,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-31 20:42:20,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:42:20,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-31 20:42:20,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2023-03-31 20:42:20,059 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:42:20,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:42:20,124 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2023-03-31 20:42:20,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 20:42:20,124 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-03-31 20:42:20,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:42:20,125 INFO L225 Difference]: With dead ends: 84 [2023-03-31 20:42:20,125 INFO L226 Difference]: Without dead ends: 73 [2023-03-31 20:42:20,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2023-03-31 20:42:20,127 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 86 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:42:20,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 70 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:42:20,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-03-31 20:42:20,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 27. [2023-03-31 20:42:20,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:42:20,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-03-31 20:42:20,132 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 16 [2023-03-31 20:42:20,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:42:20,132 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-03-31 20:42:20,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:42:20,133 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-03-31 20:42:20,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-31 20:42:20,133 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:42:20,133 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:42:20,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 20:42:20,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-03-31 20:42:20,338 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:42:20,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:42:20,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1230582284, now seen corresponding path program 3 times [2023-03-31 20:42:20,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:42:20,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017047958] [2023-03-31 20:42:20,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:42:20,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:42:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:42:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:42:20,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:42:20,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017047958] [2023-03-31 20:42:20,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017047958] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:42:20,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593024304] [2023-03-31 20:42:20,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:42:20,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:42:20,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:42:20,650 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:42:20,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 20:42:20,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:42:20,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:42:20,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 20:42:20,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:42:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:42:20,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:42:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:42:20,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593024304] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:42:20,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1937591271] [2023-03-31 20:42:20,968 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-03-31 20:42:20,968 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:42:20,968 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:42:20,969 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:42:20,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:42:20,990 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-03-31 20:42:21,034 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2023-03-31 20:42:21,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-03-31 20:42:21,054 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:42:21,459 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '743#(and (exists ((|v_#memory_int_118| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_118| 3 (store (store (select |v_#memory_int_118| 3) 24 30) 28 40)))) (exists ((|v_main_~#s1~0.base_BEFORE_CALL_3| Int) (|v_#length_48| (Array Int Int)) (|v_#valid_58| (Array Int Int))) (and (= (select (select |#memory_int| |v_main_~#s1~0.base_BEFORE_CALL_3|) 4) 0) (not (= (select (select |#memory_int| |v_main_~#s1~0.base_BEFORE_CALL_3|) 0) 10)) (< |#StackHeapBarrier| |v_main_~#s1~0.base_BEFORE_CALL_3|) (not (= |v_main_~#s1~0.base_BEFORE_CALL_3| 0)) (= (select (select |#memory_int| |v_main_~#s1~0.base_BEFORE_CALL_3|) 0) (select (select |#memory_int| 3) 0)) (= 0 (select |v_#valid_58| |v_main_~#s1~0.base_BEFORE_CALL_3|)) (= (store |v_#valid_58| |v_main_~#s1~0.base_BEFORE_CALL_3| 1) |#valid|) (= |#length| (store |v_#length_48| |v_main_~#s1~0.base_BEFORE_CALL_3| 8)))) (= (select (select |#memory_int| 3) 4) 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:42:21,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:42:21,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:42:21,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-03-31 20:42:21,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304870327] [2023-03-31 20:42:21,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:42:21,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-03-31 20:42:21,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:42:21,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-03-31 20:42:21,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2023-03-31 20:42:21,461 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:42:21,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:42:21,602 INFO L93 Difference]: Finished difference Result 156 states and 213 transitions. [2023-03-31 20:42:21,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-03-31 20:42:21,603 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-03-31 20:42:21,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:42:21,604 INFO L225 Difference]: With dead ends: 156 [2023-03-31 20:42:21,604 INFO L226 Difference]: Without dead ends: 145 [2023-03-31 20:42:21,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2023-03-31 20:42:21,605 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 246 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:42:21,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 113 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:42:21,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-03-31 20:42:21,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 39. [2023-03-31 20:42:21,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:42:21,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2023-03-31 20:42:21,612 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 22 [2023-03-31 20:42:21,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:42:21,613 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2023-03-31 20:42:21,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:42:21,613 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2023-03-31 20:42:21,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-03-31 20:42:21,614 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:42:21,614 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:42:21,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 20:42:21,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:42:21,820 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:42:21,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:42:21,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2020063244, now seen corresponding path program 4 times [2023-03-31 20:42:21,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:42:21,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195768848] [2023-03-31 20:42:21,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:42:21,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:42:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:42:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:42:22,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:42:22,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195768848] [2023-03-31 20:42:22,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195768848] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:42:22,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751039726] [2023-03-31 20:42:22,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:42:22,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:42:22,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:42:22,569 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:42:22,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 20:42:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:42:22,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 24 conjunts are in the unsatisfiable core [2023-03-31 20:42:22,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:42:22,871 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:42:22,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:42:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:42:23,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751039726] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:42:23,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [949934619] [2023-03-31 20:42:23,492 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-03-31 20:42:23,492 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:42:23,493 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:42:23,493 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:42:23,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:42:23,515 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-03-31 20:42:23,558 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2023-03-31 20:42:23,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-03-31 20:42:23,580 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:42:24,064 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1305#(and (= (select (select |#memory_int| 3) 4) 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#s1~0.base_BEFORE_CALL_4| Int) (|v_#valid_84| (Array Int Int)) (|v_#length_74| (Array Int Int))) (and (= (select |v_#valid_84| |v_main_~#s1~0.base_BEFORE_CALL_4|) 0) (< |#StackHeapBarrier| |v_main_~#s1~0.base_BEFORE_CALL_4|) (= (select (select |#memory_int| |v_main_~#s1~0.base_BEFORE_CALL_4|) 0) (select (select |#memory_int| 3) 0)) (= |#valid| (store |v_#valid_84| |v_main_~#s1~0.base_BEFORE_CALL_4| 1)) (not (= (select (select |#memory_int| |v_main_~#s1~0.base_BEFORE_CALL_4|) 0) 10)) (not (= |v_main_~#s1~0.base_BEFORE_CALL_4| 0)) (= |#length| (store |v_#length_74| |v_main_~#s1~0.base_BEFORE_CALL_4| 8)) (= (select (select |#memory_int| |v_main_~#s1~0.base_BEFORE_CALL_4|) 4) 0))) (= 3 |~#a~0.base|) (exists ((|v_#memory_int_193| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_193| 3 (store (store (select |v_#memory_int_193| 3) 24 30) 28 40)))) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:42:24,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:42:24,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:42:24,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-03-31 20:42:24,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497431693] [2023-03-31 20:42:24,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:42:24,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-03-31 20:42:24,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:42:24,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-03-31 20:42:24,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1356, Invalid=2184, Unknown=0, NotChecked=0, Total=3540 [2023-03-31 20:42:24,068 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:42:24,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:42:24,607 INFO L93 Difference]: Finished difference Result 300 states and 417 transitions. [2023-03-31 20:42:24,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-03-31 20:42:24,608 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2023-03-31 20:42:24,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:42:24,610 INFO L225 Difference]: With dead ends: 300 [2023-03-31 20:42:24,610 INFO L226 Difference]: Without dead ends: 289 [2023-03-31 20:42:24,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1356, Invalid=2184, Unknown=0, NotChecked=0, Total=3540 [2023-03-31 20:42:24,612 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 548 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 20:42:24,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 210 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 20:42:24,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-03-31 20:42:24,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 63. [2023-03-31 20:42:24,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:42:24,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2023-03-31 20:42:24,626 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 34 [2023-03-31 20:42:24,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:42:24,627 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2023-03-31 20:42:24,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:42:24,627 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2023-03-31 20:42:24,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-03-31 20:42:24,628 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:42:24,628 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:42:24,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 20:42:24,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:42:24,835 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:42:24,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:42:24,835 INFO L85 PathProgramCache]: Analyzing trace with hash -986070004, now seen corresponding path program 5 times [2023-03-31 20:42:24,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:42:24,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566344604] [2023-03-31 20:42:24,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:42:24,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:42:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:42:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:42:26,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:42:26,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566344604] [2023-03-31 20:42:26,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566344604] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:42:26,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093828262] [2023-03-31 20:42:26,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:42:26,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:42:26,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:42:26,934 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:42:26,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process