/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:43:16,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:43:16,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:43:16,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 02:43:17,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:43:17,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:43:17,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:43:17,018 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 02:43:17,042 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:43:17,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:43:17,043 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:43:17,043 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:43:17,044 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:43:17,044 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:43:17,044 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:43:17,045 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:43:17,045 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:43:17,045 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:43:17,046 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:43:17,046 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:43:17,046 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:43:17,046 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:43:17,046 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:43:17,046 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:43:17,046 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:43:17,047 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:43:17,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:43:17,047 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:43:17,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:43:17,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:43:17,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:43:17,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:43:17,048 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:43:17,048 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:43:17,048 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:43:17,048 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:43:17,049 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:43:17,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:43:17,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:43:17,049 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:43:17,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:43:17,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:43:17,050 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:43:17,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:43:17,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:43:17,050 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:43:17,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:43:17,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:43:17,050 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:43:17,051 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:43:17,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:43:17,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:43:17,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:43:17,313 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:43:17,314 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:43:17,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i [2023-04-01 02:43:18,420 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:43:18,616 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:43:18,617 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i [2023-04-01 02:43:18,621 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e2e5a5c8/484de4b2299940b6a8356a99d0dc51fa/FLAGdde9a90ad [2023-04-01 02:43:18,632 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e2e5a5c8/484de4b2299940b6a8356a99d0dc51fa [2023-04-01 02:43:18,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:43:18,636 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:43:18,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:43:18,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:43:18,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:43:18,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:43:18" (1/1) ... [2023-04-01 02:43:18,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@189f0a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:43:18, skipping insertion in model container [2023-04-01 02:43:18,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:43:18" (1/1) ... [2023-04-01 02:43:18,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:43:18,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:43:18,770 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_loop_dep.i[817,830] [2023-04-01 02:43:18,780 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:43:19,662 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:43:19,673 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_loop_dep.i[817,830] [2023-04-01 02:43:19,678 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:43:19,690 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:43:19,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:43:19 WrapperNode [2023-04-01 02:43:19,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:43:19,692 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:43:19,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:43:19,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:43:19,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:43:19" (1/1) ... [2023-04-01 02:43:19,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:43:19" (1/1) ... [2023-04-01 02:43:19,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:43:19" (1/1) ... [2023-04-01 02:43:19,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:43:19" (1/1) ... [2023-04-01 02:43:19,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:43:19" (1/1) ... [2023-04-01 02:43:19,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:43:19" (1/1) ... [2023-04-01 02:43:19,724 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:43:19" (1/1) ... [2023-04-01 02:43:19,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:43:19" (1/1) ... [2023-04-01 02:43:19,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:43:19,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:43:19,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:43:19,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:43:19,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:43:19" (1/1) ... [2023-04-01 02:43:19,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:43:19,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:43:19,764 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 02:43:19,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 02:43:19,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:43:19,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:43:19,800 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:43:19,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 02:43:19,800 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:43:19,800 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:43:19,800 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:43:19,800 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 02:43:19,800 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 02:43:19,800 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:43:19,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:43:19,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 02:43:19,801 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:43:19,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:43:19,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:43:19,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:43:19,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:43:19,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:43:19,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:43:19,874 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:43:19,876 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:43:19,972 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:43:20,059 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:43:20,060 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 02:43:20,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:43:20 BoogieIcfgContainer [2023-04-01 02:43:20,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:43:20,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:43:20,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:43:20,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:43:20,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:43:18" (1/3) ... [2023-04-01 02:43:20,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5d3508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:43:20, skipping insertion in model container [2023-04-01 02:43:20,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:43:19" (2/3) ... [2023-04-01 02:43:20,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5d3508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:43:20, skipping insertion in model container [2023-04-01 02:43:20,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:43:20" (3/3) ... [2023-04-01 02:43:20,075 INFO L112 eAbstractionObserver]: Analyzing ICFG array_of_struct_loop_dep.i [2023-04-01 02:43:20,099 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:43:20,099 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:43:20,154 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:43:20,159 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;@66ed604c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:43:20,159 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:43:20,163 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:43:20,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 02:43:20,169 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:43:20,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:43:20,170 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:43:20,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:43:20,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1529679341, now seen corresponding path program 1 times [2023-04-01 02:43:20,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:43:20,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651971749] [2023-04-01 02:43:20,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:43:20,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:43:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:43:20,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:43:20,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:43:20,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651971749] [2023-04-01 02:43:20,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651971749] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:43:20,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:43:20,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 02:43:20,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188215057] [2023-04-01 02:43:20,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:43:20,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:43:20,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:43:20,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:43:20,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:43:20,412 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:43:20,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:43:20,446 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2023-04-01 02:43:20,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:43:20,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2023-04-01 02:43:20,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:43:20,454 INFO L225 Difference]: With dead ends: 34 [2023-04-01 02:43:20,455 INFO L226 Difference]: Without dead ends: 19 [2023-04-01 02:43:20,457 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 02:43:20,460 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 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 [2023-04-01 02:43:20,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:43:20,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-01 02:43:20,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2023-04-01 02:43:20,488 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 02:43:20,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-04-01 02:43:20,490 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2023-04-01 02:43:20,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:43:20,490 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-04-01 02:43:20,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:43:20,491 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-04-01 02:43:20,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 02:43:20,491 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:43:20,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:43:20,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 02:43:20,492 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:43:20,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:43:20,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1341600878, now seen corresponding path program 1 times [2023-04-01 02:43:20,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:43:20,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047422410] [2023-04-01 02:43:20,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:43:20,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:43:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:43:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:43:20,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:43:20,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047422410] [2023-04-01 02:43:20,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047422410] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:43:20,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226754079] [2023-04-01 02:43:20,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:43:20,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:43:20,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:43:20,613 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:43:20,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 02:43:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:43:20,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:43:20,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:43:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:43:20,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:43:20,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:43:20,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226754079] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:43:20,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1738259938] [2023-04-01 02:43:20,753 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 02:43:20,753 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:43:20,756 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:43:20,760 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:43:20,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:43:20,902 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-01 02:43:20,971 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-01 02:43:20,993 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 02:43:21,013 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:43:21,264 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '173#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:43:21,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:43:21,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:43:21,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 02:43:21,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718871875] [2023-04-01 02:43:21,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:43:21,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 02:43:21,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:43:21,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 02:43:21,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-04-01 02:43:21,275 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:43:21,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:43:21,322 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2023-04-01 02:43:21,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 02:43:21,323 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-01 02:43:21,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:43:21,324 INFO L225 Difference]: With dead ends: 38 [2023-04-01 02:43:21,324 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 02:43:21,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-04-01 02:43:21,326 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:43:21,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 38 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:43:21,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 02:43:21,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2023-04-01 02:43:21,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:43:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-04-01 02:43:21,331 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2023-04-01 02:43:21,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:43:21,331 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-04-01 02:43:21,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:43:21,331 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-04-01 02:43:21,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 02:43:21,332 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:43:21,332 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:43:21,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 02:43:21,537 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 [2023-04-01 02:43:21,538 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:43:21,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:43:21,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1828597971, now seen corresponding path program 2 times [2023-04-01 02:43:21,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:43:21,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410931314] [2023-04-01 02:43:21,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:43:21,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:43:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:43:21,710 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 02:43:21,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:43:21,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410931314] [2023-04-01 02:43:21,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410931314] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:43:21,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056032601] [2023-04-01 02:43:21,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:43:21,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:43:21,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:43:21,717 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:43:21,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 02:43:21,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 02:43:21,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:43:21,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 02:43:21,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:43:21,816 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 02:43:21,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:43:21,883 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 02:43:21,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056032601] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:43:21,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2100711691] [2023-04-01 02:43:21,889 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 02:43:21,890 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:43:21,890 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:43:21,890 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:43:21,890 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:43:21,949 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-01 02:43:21,981 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-01 02:43:21,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 02:43:22,002 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:43:22,230 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '374#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:43:22,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:43:22,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:43:22,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-01 02:43:22,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900892537] [2023-04-01 02:43:22,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:43:22,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 02:43:22,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:43:22,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 02:43:22,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2023-04-01 02:43:22,232 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:43:22,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:43:22,323 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2023-04-01 02:43:22,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 02:43:22,323 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-01 02:43:22,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:43:22,325 INFO L225 Difference]: With dead ends: 62 [2023-04-01 02:43:22,325 INFO L226 Difference]: Without dead ends: 53 [2023-04-01 02:43:22,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2023-04-01 02:43:22,327 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:43:22,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 47 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:43:22,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-01 02:43:22,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 25. [2023-04-01 02:43:22,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:43:22,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-04-01 02:43:22,334 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 15 [2023-04-01 02:43:22,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:43:22,334 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-04-01 02:43:22,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:43:22,334 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-04-01 02:43:22,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 02:43:22,335 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:43:22,335 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:43:22,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 02:43:22,541 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 [2023-04-01 02:43:22,541 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:43:22,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:43:22,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1633486093, now seen corresponding path program 3 times [2023-04-01 02:43:22,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:43:22,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335423993] [2023-04-01 02:43:22,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:43:22,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:43:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:43:22,750 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 02:43:22,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:43:22,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335423993] [2023-04-01 02:43:22,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335423993] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:43:22,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364279245] [2023-04-01 02:43:22,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:43:22,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:43:22,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:43:22,753 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:43:22,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 02:43:22,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:43:22,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:43:22,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 02:43:22,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:43:22,859 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 02:43:22,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:43:23,034 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 02:43:23,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364279245] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:43:23,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [235649007] [2023-04-01 02:43:23,038 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 02:43:23,038 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:43:23,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:43:23,039 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:43:23,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:43:23,087 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-01 02:43:23,119 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-01 02:43:23,127 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 02:43:23,138 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:43:23,371 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '677#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:43:23,372 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:43:23,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:43:23,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-01 02:43:23,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183407143] [2023-04-01 02:43:23,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:43:23,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 02:43:23,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:43:23,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 02:43:23,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=810, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 02:43:23,374 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:43:23,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:43:23,585 INFO L93 Difference]: Finished difference Result 110 states and 144 transitions. [2023-04-01 02:43:23,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 02:43:23,586 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-01 02:43:23,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:43:23,589 INFO L225 Difference]: With dead ends: 110 [2023-04-01 02:43:23,589 INFO L226 Difference]: Without dead ends: 101 [2023-04-01 02:43:23,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=810, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 02:43:23,594 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:43:23,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 56 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:43:23,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-04-01 02:43:23,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 37. [2023-04-01 02:43:23,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:43:23,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2023-04-01 02:43:23,610 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 21 [2023-04-01 02:43:23,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:43:23,610 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2023-04-01 02:43:23,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:43:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2023-04-01 02:43:23,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 02:43:23,611 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:43:23,611 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:43:23,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 02:43:23,819 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 [2023-04-01 02:43:23,819 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:43:23,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:43:23,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1542866739, now seen corresponding path program 4 times [2023-04-01 02:43:23,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:43:23,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629048385] [2023-04-01 02:43:23,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:43:23,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:43:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:43:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:43:24,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:43:24,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629048385] [2023-04-01 02:43:24,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629048385] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:43:24,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928944821] [2023-04-01 02:43:24,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:43:24,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:43:24,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:43:24,343 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:43:24,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 02:43:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:43:24,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 02:43:24,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:43:24,465 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:43:24,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:43:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:43:25,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928944821] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:43:25,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1652940953] [2023-04-01 02:43:25,155 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 02:43:25,155 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:43:25,156 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:43:25,156 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:43:25,156 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:43:25,185 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-01 02:43:25,206 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-01 02:43:25,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 02:43:25,220 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:43:25,512 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1184#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:43:25,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:43:25,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:43:25,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-04-01 02:43:25,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858762629] [2023-04-01 02:43:25,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:43:25,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-01 02:43:25,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:43:25,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-01 02:43:25,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1304, Invalid=2118, Unknown=0, NotChecked=0, Total=3422 [2023-04-01 02:43:25,517 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:43:25,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:43:25,961 INFO L93 Difference]: Finished difference Result 206 states and 276 transitions. [2023-04-01 02:43:25,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-01 02:43:25,962 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2023-04-01 02:43:25,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:43:25,963 INFO L225 Difference]: With dead ends: 206 [2023-04-01 02:43:25,963 INFO L226 Difference]: Without dead ends: 197 [2023-04-01 02:43:25,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1304, Invalid=2118, Unknown=0, NotChecked=0, Total=3422 [2023-04-01 02:43:25,965 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 149 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 02:43:25,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 56 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 02:43:25,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-04-01 02:43:25,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 61. [2023-04-01 02:43:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:43:25,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2023-04-01 02:43:25,980 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 33 [2023-04-01 02:43:25,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:43:25,980 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2023-04-01 02:43:25,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:43:25,980 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2023-04-01 02:43:25,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 02:43:25,981 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:43:25,981 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:43:25,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 02:43:26,187 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 [2023-04-01 02:43:26,188 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:43:26,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:43:26,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1388036019, now seen corresponding path program 5 times [2023-04-01 02:43:26,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:43:26,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294793689] [2023-04-01 02:43:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:43:26,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:43:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:43:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:43:27,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:43:27,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294793689] [2023-04-01 02:43:27,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294793689] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:43:27,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128029298] [2023-04-01 02:43:27,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:43:27,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:43:27,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:43:27,766 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:43:27,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 02:44:14,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-04-01 02:44:14,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:44:14,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-01 02:44:14,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:44:14,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:44:14,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:44:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:44:17,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128029298] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:44:17,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2020671718] [2023-04-01 02:44:17,305 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 02:44:17,305 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:44:17,305 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:44:17,305 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:44:17,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:44:17,375 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-01 02:44:17,400 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-01 02:44:17,408 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 02:44:17,414 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:44:17,761 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2099#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:44:17,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:44:17,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:44:17,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2023-04-01 02:44:17,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542110790] [2023-04-01 02:44:17,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:44:17,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-04-01 02:44:17,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:44:17,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-04-01 02:44:17,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4880, Invalid=6462, Unknown=0, NotChecked=0, Total=11342 [2023-04-01 02:44:17,768 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:44:19,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:44:19,430 INFO L93 Difference]: Finished difference Result 398 states and 540 transitions. [2023-04-01 02:44:19,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-04-01 02:44:19,432 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 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 57 [2023-04-01 02:44:19,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:44:19,434 INFO L225 Difference]: With dead ends: 398 [2023-04-01 02:44:19,434 INFO L226 Difference]: Without dead ends: 389 [2023-04-01 02:44:19,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1698 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4880, Invalid=6462, Unknown=0, NotChecked=0, Total=11342 [2023-04-01 02:44:19,437 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 443 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 794 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 02:44:19,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 29 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [794 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 02:44:19,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-04-01 02:44:19,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 109. [2023-04-01 02:44:19,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:44:19,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2023-04-01 02:44:19,463 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 57 [2023-04-01 02:44:19,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:44:19,464 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2023-04-01 02:44:19,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:44:19,464 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2023-04-01 02:44:19,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-01 02:44:19,466 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:44:19,466 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:44:19,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 02:44:19,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:44:19,681 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:44:19,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:44:19,681 INFO L85 PathProgramCache]: Analyzing trace with hash -75641011, now seen corresponding path program 6 times [2023-04-01 02:44:19,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:44:19,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484425582] [2023-04-01 02:44:19,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:44:19,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:44:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:44:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:44:24,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:44:24,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484425582] [2023-04-01 02:44:24,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484425582] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:44:24,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077204412] [2023-04-01 02:44:24,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:44:24,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:44:24,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:44:24,437 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:44:24,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 02:44:24,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:44:24,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:44:24,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 96 conjunts are in the unsatisfiable core [2023-04-01 02:44:24,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:44:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:44:24,813 INFO L327 TraceCheckSpWp]: Computing backward predicates...