/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/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:49:44,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:49:44,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:49:44,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 04:49:44,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:49:44,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:49:44,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:49:44,403 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 04:49:44,430 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:49:44,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:49:44,431 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:49:44,431 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:49:44,431 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:49:44,431 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:49:44,431 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:49:44,432 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:49:44,432 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:49:44,432 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:49:44,432 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:49:44,432 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:49:44,432 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:49:44,433 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:49:44,433 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:49:44,433 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:49:44,433 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:49:44,433 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:49:44,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:49:44,433 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:49:44,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:49:44,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:49:44,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:49:44,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:49:44,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:49:44,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:49:44,434 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:49:44,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:49:44,434 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:49:44,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:49:44,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:49:44,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:49:44,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:49:44,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:49:44,435 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:49:44,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:49:44,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:49:44,436 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:49:44,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:49:44,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:49:44,436 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:49:44,436 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:49:44,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:49:44,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:49:44,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:49:44,637 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:49:44,639 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:49:44,640 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test24-2.c [2023-04-01 04:49:45,669 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:49:45,804 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:49:45,805 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test24-2.c [2023-04-01 04:49:45,808 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c4e3a0cf/804233b074e349729f7011aa5a729856/FLAGcfa3f0b13 [2023-04-01 04:49:45,817 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c4e3a0cf/804233b074e349729f7011aa5a729856 [2023-04-01 04:49:45,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:49:45,820 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:49:45,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:49:45,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:49:45,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:49:45,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:49:45" (1/1) ... [2023-04-01 04:49:45,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4304c80e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:49:45, skipping insertion in model container [2023-04-01 04:49:45,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:49:45" (1/1) ... [2023-04-01 04:49:45,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:49:45,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:49:45,935 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/ldv-regression/test24-2.c[807,820] [2023-04-01 04:49:45,937 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:49:45,943 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:49:45,954 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/ldv-regression/test24-2.c[807,820] [2023-04-01 04:49:45,954 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:49:45,963 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:49:45,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:49:45 WrapperNode [2023-04-01 04:49:45,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:49:45,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:49:45,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:49:45,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:49:45,975 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:49:45" (1/1) ... [2023-04-01 04:49:45,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:49:45" (1/1) ... [2023-04-01 04:49:45,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:49:45" (1/1) ... [2023-04-01 04:49:45,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:49:45" (1/1) ... [2023-04-01 04:49:45,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:49:45" (1/1) ... [2023-04-01 04:49:45,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:49:45" (1/1) ... [2023-04-01 04:49:45,986 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:49:45" (1/1) ... [2023-04-01 04:49:45,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:49:45" (1/1) ... [2023-04-01 04:49:45,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:49:45,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:49:45,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:49:45,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:49:45,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:49:45" (1/1) ... [2023-04-01 04:49:45,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:49:46,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:49:46,023 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 04:49:46,025 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 04:49:46,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:49:46,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:49:46,049 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:49:46,049 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 04:49:46,049 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:49:46,049 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:49:46,049 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:49:46,049 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:49:46,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:49:46,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:49:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 04:49:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:49:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:49:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 04:49:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:49:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:49:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:49:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:49:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:49:46,100 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:49:46,101 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:49:46,231 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:49:46,263 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:49:46,263 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 04:49:46,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:49:46 BoogieIcfgContainer [2023-04-01 04:49:46,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:49:46,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:49:46,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:49:46,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:49:46,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:49:45" (1/3) ... [2023-04-01 04:49:46,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@766fe7f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:49:46, skipping insertion in model container [2023-04-01 04:49:46,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:49:45" (2/3) ... [2023-04-01 04:49:46,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@766fe7f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:49:46, skipping insertion in model container [2023-04-01 04:49:46,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:49:46" (3/3) ... [2023-04-01 04:49:46,283 INFO L112 eAbstractionObserver]: Analyzing ICFG test24-2.c [2023-04-01 04:49:46,302 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:49:46,302 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:49:46,333 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:49:46,337 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;@653bab8b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:49:46,337 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:49:46,340 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:49:46,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 04:49:46,345 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:49:46,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:49:46,345 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:49:46,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:49:46,349 INFO L85 PathProgramCache]: Analyzing trace with hash -233587700, now seen corresponding path program 1 times [2023-04-01 04:49:46,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:49:46,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960415154] [2023-04-01 04:49:46,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:49:46,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:49:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:49:46,486 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 04:49:46,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:49:46,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960415154] [2023-04-01 04:49:46,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960415154] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:49:46,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:49:46,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 04:49:46,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262267683] [2023-04-01 04:49:46,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:49:46,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 04:49:46,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:49:46,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 04:49:46,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 04:49:46,521 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:49:46,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:49:46,544 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2023-04-01 04:49:46,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 04:49:46,547 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2023-04-01 04:49:46,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:49:46,554 INFO L225 Difference]: With dead ends: 33 [2023-04-01 04:49:46,554 INFO L226 Difference]: Without dead ends: 16 [2023-04-01 04:49:46,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 04:49:46,559 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:49:46,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:49:46,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-04-01 04:49:46,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-04-01 04:49:46,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:49:46,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-04-01 04:49:46,590 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2023-04-01 04:49:46,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:49:46,592 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-04-01 04:49:46,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:49:46,594 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-04-01 04:49:46,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 04:49:46,595 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:49:46,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:49:46,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:49:46,596 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:49:46,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:49:46,597 INFO L85 PathProgramCache]: Analyzing trace with hash -620352218, now seen corresponding path program 1 times [2023-04-01 04:49:46,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:49:46,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887003723] [2023-04-01 04:49:46,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:49:46,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:49:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:49:46,728 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 04:49:46,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:49:46,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887003723] [2023-04-01 04:49:46,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887003723] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:49:46,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:49:46,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:49:46,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955854343] [2023-04-01 04:49:46,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:49:46,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:49:46,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:49:46,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:49:46,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:49:46,731 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:49:46,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:49:46,747 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2023-04-01 04:49:46,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:49:46,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-04-01 04:49:46,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:49:46,748 INFO L225 Difference]: With dead ends: 27 [2023-04-01 04:49:46,748 INFO L226 Difference]: Without dead ends: 17 [2023-04-01 04:49:46,749 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 [2023-04-01 04:49:46,749 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:49:46,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:49:46,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-04-01 04:49:46,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-04-01 04:49:46,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:49:46,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-04-01 04:49:46,753 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2023-04-01 04:49:46,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:49:46,754 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-04-01 04:49:46,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:49:46,754 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-04-01 04:49:46,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 04:49:46,754 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:49:46,754 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:49:46,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:49:46,755 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:49:46,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:49:46,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1546645585, now seen corresponding path program 1 times [2023-04-01 04:49:46,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:49:46,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456337533] [2023-04-01 04:49:46,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:49:46,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:49:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:49:46,844 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 04:49:46,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:49:46,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456337533] [2023-04-01 04:49:46,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456337533] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:49:46,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959412988] [2023-04-01 04:49:46,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:49:46,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:49:46,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:49:46,847 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 04:49:46,848 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 04:49:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:49:46,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 04:49:46,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:49:46,960 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 04:49:46,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:49:46,997 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 04:49:46,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959412988] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:49:47,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [978186759] [2023-04-01 04:49:47,016 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 04:49:47,016 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:49:47,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:49:47,025 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:49:47,026 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:49:47,128 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 04:49:47,563 INFO L197 IcfgInterpreter]: Interpreting procedure check with input of size 50 for LOIs [2023-04-01 04:49:47,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:49:47,583 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:49:48,219 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '267#(and (<= 1 |#StackHeapBarrier|) (= |main_~#ad1~0.offset| 0) (= main_~pa~0.base main_~ad2~0.base) (= main_~ad2~0.offset 0) (<= 20 main_~j~0) (= |main_~#ad1~0.base| main_~ad2~0.base) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) main_~pa~0.base) (= |#NULL.base| 0))' at error location [2023-04-01 04:49:48,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:49:48,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:49:48,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 04:49:48,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672818928] [2023-04-01 04:49:48,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:49:48,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 04:49:48,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:49:48,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 04:49:48,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-04-01 04:49:48,222 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:49:48,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:49:48,247 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2023-04-01 04:49:48,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:49:48,248 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 16 [2023-04-01 04:49:48,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:49:48,248 INFO L225 Difference]: With dead ends: 30 [2023-04-01 04:49:48,248 INFO L226 Difference]: Without dead ends: 20 [2023-04-01 04:49:48,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-04-01 04:49:48,251 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:49:48,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:49:48,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-01 04:49:48,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-01 04:49:48,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:49:48,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-04-01 04:49:48,261 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2023-04-01 04:49:48,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:49:48,261 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-04-01 04:49:48,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:49:48,261 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-04-01 04:49:48,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 04:49:48,262 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:49:48,262 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:49:48,272 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 04:49:48,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:49:48,468 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:49:48,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:49:48,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1192026138, now seen corresponding path program 2 times [2023-04-01 04:49:48,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:49:48,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268075517] [2023-04-01 04:49:48,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:49:48,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:49:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:49:48,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:49:48,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:49:48,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268075517] [2023-04-01 04:49:48,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268075517] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:49:48,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317337510] [2023-04-01 04:49:48,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 04:49:48,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:49:48,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:49:48,574 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 04:49:48,575 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 04:49:48,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 04:49:48,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:49:48,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:49:48,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:49:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:49:48,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:49:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:49:48,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317337510] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:49:48,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [100821818] [2023-04-01 04:49:48,725 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 04:49:48,725 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:49:48,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:49:48,726 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:49:48,726 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:49:48,751 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 04:49:48,906 INFO L197 IcfgInterpreter]: Interpreting procedure check with input of size 43 for LOIs [2023-04-01 04:49:48,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:49:48,917 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:49:49,495 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '483#(and (<= 1 |#StackHeapBarrier|) (= |main_~#ad1~0.offset| 0) (= main_~pa~0.base main_~ad2~0.base) (= main_~ad2~0.offset 0) (<= 20 main_~j~0) (= |main_~#ad1~0.base| main_~ad2~0.base) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) main_~pa~0.base) (= |#NULL.base| 0))' at error location [2023-04-01 04:49:49,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:49:49,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:49:49,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-01 04:49:49,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678094946] [2023-04-01 04:49:49,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:49:49,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 04:49:49,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:49:49,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 04:49:49,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2023-04-01 04:49:49,498 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:49:49,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:49:49,515 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2023-04-01 04:49:49,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 04:49:49,516 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2023-04-01 04:49:49,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:49:49,516 INFO L225 Difference]: With dead ends: 36 [2023-04-01 04:49:49,516 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 04:49:49,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2023-04-01 04:49:49,517 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:49:49,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:49:49,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 04:49:49,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-04-01 04:49:49,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:49:49,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-04-01 04:49:49,520 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2023-04-01 04:49:49,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:49:49,521 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-04-01 04:49:49,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:49:49,521 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-04-01 04:49:49,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:49:49,521 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:49:49,521 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:49:49,531 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 04:49:49,722 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,SelfDestructingSolverStorable3 [2023-04-01 04:49:49,722 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:49:49,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:49:49,723 INFO L85 PathProgramCache]: Analyzing trace with hash 609597446, now seen corresponding path program 3 times [2023-04-01 04:49:49,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:49:49,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654676485] [2023-04-01 04:49:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:49:49,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:49:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:49:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:49:49,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:49:49,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654676485] [2023-04-01 04:49:49,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654676485] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:49:49,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390027219] [2023-04-01 04:49:49,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 04:49:49,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:49:49,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:49:49,940 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 04:49:49,942 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 04:49:50,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 04:49:50,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:49:50,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 04:49:50,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:49:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:49:50,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:49:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:49:50,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390027219] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:49:50,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1609046257] [2023-04-01 04:49:50,169 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 04:49:50,169 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:49:50,169 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:49:50,169 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:49:50,169 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:49:50,186 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 04:49:50,324 INFO L197 IcfgInterpreter]: Interpreting procedure check with input of size 43 for LOIs [2023-04-01 04:49:50,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:49:50,334 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:49:50,930 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '769#(and (<= 1 |#StackHeapBarrier|) (= |main_~#ad1~0.offset| 0) (= main_~pa~0.base main_~ad2~0.base) (= main_~ad2~0.offset 0) (<= 20 main_~j~0) (= |main_~#ad1~0.base| main_~ad2~0.base) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) main_~pa~0.base) (= |#NULL.base| 0))' at error location [2023-04-01 04:49:50,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:49:50,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:49:50,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2023-04-01 04:49:50,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399082911] [2023-04-01 04:49:50,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:49:50,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 04:49:50,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:49:50,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 04:49:50,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 04:49:50,933 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:49:50,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:49:50,958 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2023-04-01 04:49:50,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 04:49:50,959 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2023-04-01 04:49:50,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:49:50,960 INFO L225 Difference]: With dead ends: 46 [2023-04-01 04:49:50,960 INFO L226 Difference]: Without dead ends: 36 [2023-04-01 04:49:50,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 04:49:50,963 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:49:50,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:49:50,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-01 04:49:50,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-04-01 04:49:50,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:49:50,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2023-04-01 04:49:50,976 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 25 [2023-04-01 04:49:50,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:49:50,976 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2023-04-01 04:49:50,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:49:50,976 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2023-04-01 04:49:50,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 04:49:50,977 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:49:50,978 INFO L195 NwaCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:49:50,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 04:49:51,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:49:51,185 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:49:51,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:49:51,186 INFO L85 PathProgramCache]: Analyzing trace with hash -413324570, now seen corresponding path program 4 times [2023-04-01 04:49:51,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:49:51,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403602810] [2023-04-01 04:49:51,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:49:51,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:49:51,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 04:49:51,267 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-01 04:49:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 04:49:51,357 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-01 04:49:51,357 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-01 04:49:51,358 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 04:49:51,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 04:49:51,361 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2023-04-01 04:49:51,364 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 04:49:51,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 04:49:51 BoogieIcfgContainer [2023-04-01 04:49:51,397 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 04:49:51,398 INFO L158 Benchmark]: Toolchain (without parser) took 5577.82ms. Allocated memory was 186.6MB in the beginning and 305.1MB in the end (delta: 118.5MB). Free memory was 141.2MB in the beginning and 220.6MB in the end (delta: -79.4MB). Peak memory consumption was 40.9MB. Max. memory is 8.0GB. [2023-04-01 04:49:51,398 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 186.6MB. Free memory is still 139.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 04:49:51,398 INFO L158 Benchmark]: CACSL2BoogieTranslator took 143.36ms. Allocated memory is still 186.6MB. Free memory was 141.2MB in the beginning and 130.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-01 04:49:51,398 INFO L158 Benchmark]: Boogie Preprocessor took 23.82ms. Allocated memory is still 186.6MB. Free memory was 130.7MB in the beginning and 129.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-01 04:49:51,398 INFO L158 Benchmark]: RCFGBuilder took 288.80ms. Allocated memory is still 186.6MB. Free memory was 129.0MB in the beginning and 116.0MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-04-01 04:49:51,399 INFO L158 Benchmark]: TraceAbstraction took 5118.25ms. Allocated memory was 186.6MB in the beginning and 305.1MB in the end (delta: 118.5MB). Free memory was 115.4MB in the beginning and 220.6MB in the end (delta: -105.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-04-01 04:49:51,400 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 186.6MB. Free memory is still 139.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 143.36ms. Allocated memory is still 186.6MB. Free memory was 141.2MB in the beginning and 130.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.82ms. Allocated memory is still 186.6MB. Free memory was 130.7MB in the beginning and 129.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 288.80ms. Allocated memory is still 186.6MB. Free memory was 129.0MB in the beginning and 116.0MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 5118.25ms. Allocated memory was 186.6MB in the beginning and 305.1MB in the end (delta: 118.5MB). Free memory was 115.4MB in the beginning and 220.6MB in the end (delta: -105.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 39]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] struct dummy ad1[20], *ad2; [L18] int i, j, *pa; [L19] j=0 VAL [ad1={5:0}, j=0] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=1] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=2] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=3] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=4] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=5] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=6] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=7] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=8] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=9] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=10] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=11] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=12] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=13] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=14] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=15] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=16] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=17] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=18] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=19] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=20] [L19] COND FALSE !(j<20) [L23] i = __VERIFIER_nondet_int() [L24] COND TRUE i >= 0 && i < 10 [L25] ad2 = ad1 [L26] ad1[i].a = i [L27] pa = &ad1[i].a [L28] EXPR ad2[i].a [L28] i = ad2[i].a + 10 [L29] EXPR \read(*pa) VAL [\read(*pa)=0, ad1={5:0}, ad2={5:0}, i=10, j=20, pa={5:0}] [L29] COND FALSE !(i < *pa) [L32] CALL, EXPR check(ad1, i) VAL [\old(b)=10, ad1={5:0}] [L12] EXPR ad1[b].a [L12] return ad1[b].a == b; [L32] RET, EXPR check(ad1, i) VAL [ad1={5:0}, ad2={5:0}, check(ad1, i)=0, i=10, j=20, pa={5:0}] [L32] COND TRUE !check(ad1, i) [L39] reach_error() VAL [ad1={5:0}, ad2={5:0}, i=10, j=20, pa={5:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.0s, OverallIterations: 6, TraceHistogramMax: 20, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 155 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 84 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 78 IncrementalHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 71 mSDtfsCounter, 78 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 206 GetRequests, 127 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=5, InterpolantAutomatonStates: 45, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 184 NumberOfCodeBlocks, 184 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 198 ConstructedInterpolants, 0 QuantifiedInterpolants, 308 SizeOfPredicates, 0 NumberOfNonLiveVariables, 498 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 0/198 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-04-01 04:49:51,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...